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mm/mempolicy.c
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// SPDX-License-Identifier: GPL-2.0-only |
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/* * Simple NUMA memory policy for the Linux kernel. * * Copyright 2003,2004 Andi Kleen, SuSE Labs. |
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* (C) Copyright 2005 Christoph Lameter, Silicon Graphics, Inc. |
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* * NUMA policy allows the user to give hints in which node(s) memory should * be allocated. * * Support four policies per VMA and per process: * * The VMA policy has priority over the process policy for a page fault. * * interleave Allocate memory interleaved over a set of nodes, * with normal fallback if it fails. * For VMA based allocations this interleaves based on the * offset into the backing object or offset into the mapping * for anonymous memory. For process policy an process counter * is used. |
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* |
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* bind Only allocate memory on a specific set of nodes, * no fallback. |
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* FIXME: memory is allocated starting with the first node * to the last. It would be better if bind would truly restrict * the allocation to memory nodes instead * |
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* preferred Try a specific node first before normal fallback. |
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* As a special case NUMA_NO_NODE here means do the allocation |
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* on the local CPU. This is normally identical to default, * but useful to set in a VMA when you have a non default * process policy. |
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* |
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* preferred many Try a set of nodes first before normal fallback. This is * similar to preferred without the special case. * |
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* default Allocate on the local node first, or when on a VMA * use the process policy. This is what Linux always did * in a NUMA aware kernel and still does by, ahem, default. * * The process policy is applied for most non interrupt memory allocations * in that process' context. Interrupts ignore the policies and always * try to allocate on the local CPU. The VMA policy is only applied for memory * allocations for a VMA in the VM. * * Currently there are a few corner cases in swapping where the policy * is not applied, but the majority should be handled. When process policy * is used it is not remembered over swap outs/swap ins. * * Only the highest zone in the zone hierarchy gets policied. Allocations * requesting a lower zone just use default policy. This implies that * on systems with highmem kernel lowmem allocation don't get policied. * Same with GFP_DMA allocations. * * For shmfs/tmpfs/hugetlbfs shared memory the policy is shared between * all users and remembered even when nobody has memory mapped. */ /* Notebook: fix mmap readahead to honour policy and enable policy for any page cache object statistics for bigpages global policy for page cache? currently it uses process policy. Requires first item above. handle mremap for shared memory (currently ignored for the policy) grows down? make bind policy root only? It can trigger oom much faster and the kernel is not always grateful with that. |
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*/ |
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
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#include <linux/mempolicy.h> |
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#include <linux/pagewalk.h> |
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#include <linux/highmem.h> #include <linux/hugetlb.h> #include <linux/kernel.h> #include <linux/sched.h> |
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#include <linux/sched/mm.h> |
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#include <linux/sched/numa_balancing.h> |
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#include <linux/sched/task.h> |
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#include <linux/nodemask.h> #include <linux/cpuset.h> |
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#include <linux/slab.h> #include <linux/string.h> |
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#include <linux/export.h> |
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#include <linux/nsproxy.h> |
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#include <linux/interrupt.h> #include <linux/init.h> #include <linux/compat.h> |
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#include <linux/ptrace.h> |
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#include <linux/swap.h> |
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#include <linux/seq_file.h> #include <linux/proc_fs.h> |
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#include <linux/migrate.h> |
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#include <linux/ksm.h> |
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#include <linux/rmap.h> |
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#include <linux/security.h> |
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#include <linux/syscalls.h> |
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#include <linux/ctype.h> |
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#include <linux/mm_inline.h> |
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#include <linux/mmu_notifier.h> |
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#include <linux/printk.h> |
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#include <linux/swapops.h> |
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|
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#include <asm/tlbflush.h> |
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#include <linux/uaccess.h> |
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|
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#include "internal.h" |
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/* Internal flags */ |
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#define MPOL_MF_DISCONTIG_OK (MPOL_MF_INTERNAL << 0) /* Skip checks for continuous vmas */ |
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#define MPOL_MF_INVERT (MPOL_MF_INTERNAL << 1) /* Invert check for nodemask */ |
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|
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static struct kmem_cache *policy_cache; static struct kmem_cache *sn_cache; |
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|
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/* Highest zone. An specific allocation for a zone below that is not policied. */ |
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enum zone_type policy_zone = 0; |
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|
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/* * run-time system-wide default policy => local allocation */ |
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static struct mempolicy default_policy = { |
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.refcnt = ATOMIC_INIT(1), /* never free it */ |
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.mode = MPOL_LOCAL, |
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}; |
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static struct mempolicy preferred_node_policy[MAX_NUMNODES]; |
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/** * numa_map_to_online_node - Find closest online node |
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* @node: Node id to start the search |
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* * Lookup the next closest node by distance if @nid is not online. */ int numa_map_to_online_node(int node) { |
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int min_dist = INT_MAX, dist, n, min_node; |
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|
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if (node == NUMA_NO_NODE || node_online(node)) return node; |
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min_node = node; |
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for_each_online_node(n) { dist = node_distance(node, n); if (dist < min_dist) { min_dist = dist; min_node = n; |
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} } return min_node; } EXPORT_SYMBOL_GPL(numa_map_to_online_node); |
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struct mempolicy *get_task_policy(struct task_struct *p) |
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{ struct mempolicy *pol = p->mempolicy; |
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int node; |
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|
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if (pol) return pol; |
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|
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node = numa_node_id(); if (node != NUMA_NO_NODE) { pol = &preferred_node_policy[node]; /* preferred_node_policy is not initialised early in boot */ if (pol->mode) return pol; |
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} |
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return &default_policy; |
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} |
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static const struct mempolicy_operations { int (*create)(struct mempolicy *pol, const nodemask_t *nodes); |
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void (*rebind)(struct mempolicy *pol, const nodemask_t *nodes); |
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} mpol_ops[MPOL_MAX]; |
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static inline int mpol_store_user_nodemask(const struct mempolicy *pol) { |
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return pol->flags & MPOL_MODE_FLAGS; |
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} static void mpol_relative_nodemask(nodemask_t *ret, const nodemask_t *orig, const nodemask_t *rel) { nodemask_t tmp; nodes_fold(tmp, *orig, nodes_weight(*rel)); nodes_onto(*ret, tmp, *rel); |
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} |
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static int mpol_new_nodemask(struct mempolicy *pol, const nodemask_t *nodes) |
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{ if (nodes_empty(*nodes)) return -EINVAL; |
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pol->nodes = *nodes; |
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return 0; } static int mpol_new_preferred(struct mempolicy *pol, const nodemask_t *nodes) { |
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if (nodes_empty(*nodes)) return -EINVAL; |
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nodes_clear(pol->nodes); node_set(first_node(*nodes), pol->nodes); |
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return 0; } |
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/* * mpol_set_nodemask is called after mpol_new() to set up the nodemask, if * any, for the new policy. mpol_new() has already validated the nodes |
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* parameter with respect to the policy mode and flags. |
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* * Must be called holding task's alloc_lock to protect task's mems_allowed |
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* and mempolicy. May also be called holding the mmap_lock for write. |
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*/ |
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static int mpol_set_nodemask(struct mempolicy *pol, const nodemask_t *nodes, struct nodemask_scratch *nsc) |
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{ |
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int ret; |
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/* * Default (pol==NULL) resp. local memory policies are not a * subject of any remapping. They also do not need any special * constructor. */ if (!pol || pol->mode == MPOL_LOCAL) |
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return 0; |
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|
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/* Check N_MEMORY */ |
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nodes_and(nsc->mask1, |
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cpuset_current_mems_allowed, node_states[N_MEMORY]); |
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VM_BUG_ON(!nodes); |
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|
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if (pol->flags & MPOL_F_RELATIVE_NODES) mpol_relative_nodemask(&nsc->mask2, nodes, &nsc->mask1); else nodes_and(nsc->mask2, *nodes, nsc->mask1); |
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|
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if (mpol_store_user_nodemask(pol)) pol->w.user_nodemask = *nodes; |
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else |
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pol->w.cpuset_mems_allowed = cpuset_current_mems_allowed; ret = mpol_ops[pol->mode].create(pol, &nsc->mask2); |
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return ret; } /* * This function just creates a new policy, does some check and simple * initialization. You must invoke mpol_set_nodemask() to set nodes. */ |
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static struct mempolicy *mpol_new(unsigned short mode, unsigned short flags, nodemask_t *nodes) |
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{ struct mempolicy *policy; |
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pr_debug("setting mode %d flags %d nodes[0] %lx ", |
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mode, flags, nodes ? nodes_addr(*nodes)[0] : NUMA_NO_NODE); |
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|
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if (mode == MPOL_DEFAULT) { if (nodes && !nodes_empty(*nodes)) |
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return ERR_PTR(-EINVAL); |
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return NULL; |
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} |
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VM_BUG_ON(!nodes); /* * MPOL_PREFERRED cannot be used with MPOL_F_STATIC_NODES or * MPOL_F_RELATIVE_NODES if the nodemask is empty (local allocation). * All other modes require a valid pointer to a non-empty nodemask. */ if (mode == MPOL_PREFERRED) { if (nodes_empty(*nodes)) { if (((flags & MPOL_F_STATIC_NODES) || (flags & MPOL_F_RELATIVE_NODES))) return ERR_PTR(-EINVAL); |
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mode = MPOL_LOCAL; |
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} |
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} else if (mode == MPOL_LOCAL) { |
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if (!nodes_empty(*nodes) || (flags & MPOL_F_STATIC_NODES) || (flags & MPOL_F_RELATIVE_NODES)) |
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return ERR_PTR(-EINVAL); |
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} else if (nodes_empty(*nodes)) return ERR_PTR(-EINVAL); |
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policy = kmem_cache_alloc(policy_cache, GFP_KERNEL); if (!policy) return ERR_PTR(-ENOMEM); atomic_set(&policy->refcnt, 1); |
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policy->mode = mode; |
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policy->flags = flags; |
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|
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return policy; |
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} |
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/* Slow path of a mpol destructor. */ void __mpol_put(struct mempolicy *p) { if (!atomic_dec_and_test(&p->refcnt)) return; |
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kmem_cache_free(policy_cache, p); } |
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static void mpol_rebind_default(struct mempolicy *pol, const nodemask_t *nodes) |
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{ } |
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static void mpol_rebind_nodemask(struct mempolicy *pol, const nodemask_t *nodes) |
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{ nodemask_t tmp; if (pol->flags & MPOL_F_STATIC_NODES) nodes_and(tmp, pol->w.user_nodemask, *nodes); else if (pol->flags & MPOL_F_RELATIVE_NODES) mpol_relative_nodemask(&tmp, &pol->w.user_nodemask, nodes); else { |
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nodes_remap(tmp, pol->nodes, pol->w.cpuset_mems_allowed, |
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*nodes); |
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pol->w.cpuset_mems_allowed = *nodes; |
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} |
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|
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if (nodes_empty(tmp)) tmp = *nodes; |
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pol->nodes = tmp; |
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} static void mpol_rebind_preferred(struct mempolicy *pol, |
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const nodemask_t *nodes) |
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{ |
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pol->w.cpuset_mems_allowed = *nodes; |
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} |
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/* * mpol_rebind_policy - Migrate a policy to a different set of nodes * |
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* Per-vma policies are protected by mmap_lock. Allocations using per-task |
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* policies are protected by task->mems_allowed_seq to prevent a premature * OOM/allocation failure due to parallel nodemask modification. |
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*/ |
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static void mpol_rebind_policy(struct mempolicy *pol, const nodemask_t *newmask) |
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{ |
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if (!pol || pol->mode == MPOL_LOCAL) |
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return; |
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if (!mpol_store_user_nodemask(pol) && |
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nodes_equal(pol->w.cpuset_mems_allowed, *newmask)) return; |
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|
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mpol_ops[pol->mode].rebind(pol, newmask); |
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} /* * Wrapper for mpol_rebind_policy() that just requires task * pointer, and updates task mempolicy. |
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* * Called with task's alloc_lock held. |
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*/ |
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void mpol_rebind_task(struct task_struct *tsk, const nodemask_t *new) |
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{ |
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mpol_rebind_policy(tsk->mempolicy, new); |
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} /* * Rebind each vma in mm to new nodemask. * |
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* Call holding a reference to mm. Takes mm->mmap_lock during call. |
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*/ void mpol_rebind_mm(struct mm_struct *mm, nodemask_t *new) { struct vm_area_struct *vma; |
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mmap_write_lock(mm); |
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for (vma = mm->mmap; vma; vma = vma->vm_next) |
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mpol_rebind_policy(vma->vm_policy, new); |
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mmap_write_unlock(mm); |
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} |
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static const struct mempolicy_operations mpol_ops[MPOL_MAX] = { [MPOL_DEFAULT] = { .rebind = mpol_rebind_default, }, [MPOL_INTERLEAVE] = { |
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.create = mpol_new_nodemask, |
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.rebind = mpol_rebind_nodemask, }, [MPOL_PREFERRED] = { .create = mpol_new_preferred, .rebind = mpol_rebind_preferred, }, [MPOL_BIND] = { |
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.create = mpol_new_nodemask, |
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.rebind = mpol_rebind_nodemask, }, |
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[MPOL_LOCAL] = { .rebind = mpol_rebind_default, }, |
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[MPOL_PREFERRED_MANY] = { |
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.create = mpol_new_nodemask, |
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.rebind = mpol_rebind_preferred, }, |
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}; |
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static int migrate_page_add(struct page *page, struct list_head *pagelist, |
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unsigned long flags); |
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|
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394 395 396 397 |
struct queue_pages { struct list_head *pagelist; unsigned long flags; nodemask_t *nmask; |
f18da660c mm/mempolicy.c: f... |
398 399 400 |
unsigned long start; unsigned long end; struct vm_area_struct *first; |
6f4576e36 mempolicy: apply ... |
401 |
}; |
980949457 mm/mempolicy: ren... |
402 |
/* |
88aaa2a1d mm: mempolicy: ad... |
403 404 405 406 407 408 409 410 411 412 413 414 415 |
* Check if the page's nid is in qp->nmask. * * If MPOL_MF_INVERT is set in qp->flags, check if the nid is * in the invert of qp->nmask. */ static inline bool queue_pages_required(struct page *page, struct queue_pages *qp) { int nid = page_to_nid(page); unsigned long flags = qp->flags; return node_isset(nid, *qp->nmask) == !(flags & MPOL_MF_INVERT); } |
a7f40cfe3 mm: mempolicy: ma... |
416 |
/* |
d88354451 mm: mempolicy: ma... |
417 |
* queue_pages_pmd() has four possible return values: |
e5947d23e mm: mempolicy: do... |
418 419 |
* 0 - pages are placed on the right node or queued successfully, or * special page is met, i.e. huge zero page. |
d88354451 mm: mempolicy: ma... |
420 421 422 423 424 425 |
* 1 - there is unmovable page, and MPOL_MF_MOVE* & MPOL_MF_STRICT were * specified. * 2 - THP was split. * -EIO - is migration entry or only MPOL_MF_STRICT was specified and an * existing page was already on a node that does not follow the * policy. |
a7f40cfe3 mm: mempolicy: ma... |
426 |
*/ |
c86337984 mm: mempolicy: mb... |
427 428 |
static int queue_pages_pmd(pmd_t *pmd, spinlock_t *ptl, unsigned long addr, unsigned long end, struct mm_walk *walk) |
959a7e136 mm/mempolicy: add... |
429 |
__releases(ptl) |
c86337984 mm: mempolicy: mb... |
430 431 432 433 434 435 436 |
{ int ret = 0; struct page *page; struct queue_pages *qp = walk->private; unsigned long flags; if (unlikely(is_pmd_migration_entry(*pmd))) { |
a7f40cfe3 mm: mempolicy: ma... |
437 |
ret = -EIO; |
c86337984 mm: mempolicy: mb... |
438 439 440 441 442 |
goto unlock; } page = pmd_page(*pmd); if (is_huge_zero_page(page)) { spin_unlock(ptl); |
e5947d23e mm: mempolicy: do... |
443 |
walk->action = ACTION_CONTINUE; |
c86337984 mm: mempolicy: mb... |
444 445 |
goto out; } |
d88354451 mm: mempolicy: ma... |
446 |
if (!queue_pages_required(page, qp)) |
c86337984 mm: mempolicy: mb... |
447 |
goto unlock; |
c86337984 mm: mempolicy: mb... |
448 |
|
c86337984 mm: mempolicy: mb... |
449 450 |
flags = qp->flags; /* go to thp migration */ |
a7f40cfe3 mm: mempolicy: ma... |
451 |
if (flags & (MPOL_MF_MOVE | MPOL_MF_MOVE_ALL)) { |
a53190a4a mm: mempolicy: ha... |
452 453 |
if (!vma_migratable(walk->vma) || migrate_page_add(page, qp->pagelist, flags)) { |
d88354451 mm: mempolicy: ma... |
454 |
ret = 1; |
a7f40cfe3 mm: mempolicy: ma... |
455 456 |
goto unlock; } |
a7f40cfe3 mm: mempolicy: ma... |
457 458 |
} else ret = -EIO; |
c86337984 mm: mempolicy: mb... |
459 460 461 462 463 |
unlock: spin_unlock(ptl); out: return ret; } |
88aaa2a1d mm: mempolicy: ad... |
464 |
/* |
980949457 mm/mempolicy: ren... |
465 466 |
* Scan through pages checking if pages follow certain conditions, * and move them to the pagelist if they do. |
d88354451 mm: mempolicy: ma... |
467 468 |
* * queue_pages_pte_range() has three possible return values: |
e5947d23e mm: mempolicy: do... |
469 470 |
* 0 - pages are placed on the right node or queued successfully, or * special page is met, i.e. zero page. |
d88354451 mm: mempolicy: ma... |
471 472 473 474 |
* 1 - there is unmovable page, and MPOL_MF_MOVE* & MPOL_MF_STRICT were * specified. * -EIO - only MPOL_MF_STRICT was specified and an existing page was already * on a node that does not follow the policy. |
980949457 mm/mempolicy: ren... |
475 |
*/ |
6f4576e36 mempolicy: apply ... |
476 477 |
static int queue_pages_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end, struct mm_walk *walk) |
1da177e4c Linux-2.6.12-rc2 |
478 |
{ |
6f4576e36 mempolicy: apply ... |
479 480 481 482 |
struct vm_area_struct *vma = walk->vma; struct page *page; struct queue_pages *qp = walk->private; unsigned long flags = qp->flags; |
c86337984 mm: mempolicy: mb... |
483 |
int ret; |
d88354451 mm: mempolicy: ma... |
484 |
bool has_unmovable = false; |
3f0884209 mm: mempolicy: fi... |
485 |
pte_t *pte, *mapped_pte; |
705e87c0c [PATCH] mm: pte_o... |
486 |
spinlock_t *ptl; |
941150a32 [PATCH] mbind: fi... |
487 |
|
c86337984 mm: mempolicy: mb... |
488 489 490 |
ptl = pmd_trans_huge_lock(pmd, vma); if (ptl) { ret = queue_pages_pmd(pmd, ptl, addr, end, walk); |
d88354451 mm: mempolicy: ma... |
491 |
if (ret != 2) |
a7f40cfe3 mm: mempolicy: ma... |
492 |
return ret; |
248db92da migrate_pages: tr... |
493 |
} |
d88354451 mm: mempolicy: ma... |
494 |
/* THP was split, fall through to pte walk */ |
91612e0df [PATCH] mbind: ch... |
495 |
|
337d9abf1 mm: thp: check pm... |
496 497 |
if (pmd_trans_unstable(pmd)) return 0; |
94723aafb mm: unclutter THP... |
498 |
|
3f0884209 mm: mempolicy: fi... |
499 |
mapped_pte = pte = pte_offset_map_lock(walk->mm, pmd, addr, &ptl); |
6f4576e36 mempolicy: apply ... |
500 |
for (; addr != end; pte++, addr += PAGE_SIZE) { |
91612e0df [PATCH] mbind: ch... |
501 |
if (!pte_present(*pte)) |
1da177e4c Linux-2.6.12-rc2 |
502 |
continue; |
6aab341e0 mm: re-architect ... |
503 504 |
page = vm_normal_page(vma, addr, *pte); if (!page) |
1da177e4c Linux-2.6.12-rc2 |
505 |
continue; |
053837fce [PATCH] mm: migra... |
506 |
/* |
62b61f611 ksm: memory hotre... |
507 508 |
* vm_normal_page() filters out zero pages, but there might * still be PageReserved pages to skip, perhaps in a VDSO. |
053837fce [PATCH] mm: migra... |
509 |
*/ |
b79bc0a0c ksm: enable KSM p... |
510 |
if (PageReserved(page)) |
f4598c8b3 [PATCH] migration... |
511 |
continue; |
88aaa2a1d mm: mempolicy: ad... |
512 |
if (!queue_pages_required(page, qp)) |
38e35860d [PATCH] mempolici... |
513 |
continue; |
a7f40cfe3 mm: mempolicy: ma... |
514 |
if (flags & (MPOL_MF_MOVE | MPOL_MF_MOVE_ALL)) { |
d88354451 mm: mempolicy: ma... |
515 516 517 |
/* MPOL_MF_STRICT must be specified if we get here */ if (!vma_migratable(vma)) { has_unmovable = true; |
a7f40cfe3 mm: mempolicy: ma... |
518 |
break; |
d88354451 mm: mempolicy: ma... |
519 |
} |
a53190a4a mm: mempolicy: ha... |
520 521 522 523 524 525 526 527 |
/* * Do not abort immediately since there may be * temporary off LRU pages in the range. Still * need migrate other LRU pages. */ if (migrate_page_add(page, qp->pagelist, flags)) has_unmovable = true; |
a7f40cfe3 mm: mempolicy: ma... |
528 529 |
} else break; |
6f4576e36 mempolicy: apply ... |
530 |
} |
3f0884209 mm: mempolicy: fi... |
531 |
pte_unmap_unlock(mapped_pte, ptl); |
6f4576e36 mempolicy: apply ... |
532 |
cond_resched(); |
d88354451 mm: mempolicy: ma... |
533 534 535 |
if (has_unmovable) return 1; |
a7f40cfe3 mm: mempolicy: ma... |
536 |
return addr != end ? -EIO : 0; |
91612e0df [PATCH] mbind: ch... |
537 |
} |
6f4576e36 mempolicy: apply ... |
538 539 540 |
static int queue_pages_hugetlb(pte_t *pte, unsigned long hmask, unsigned long addr, unsigned long end, struct mm_walk *walk) |
e2d8cf405 migrate: add huge... |
541 |
{ |
dcf176354 mm/mempolicy: sup... |
542 |
int ret = 0; |
e2d8cf405 migrate: add huge... |
543 |
#ifdef CONFIG_HUGETLB_PAGE |
6f4576e36 mempolicy: apply ... |
544 |
struct queue_pages *qp = walk->private; |
dcf176354 mm/mempolicy: sup... |
545 |
unsigned long flags = (qp->flags & MPOL_MF_VALID); |
e2d8cf405 migrate: add huge... |
546 |
struct page *page; |
cb900f412 mm, hugetlb: conv... |
547 |
spinlock_t *ptl; |
d4c54919e mm: add !pte_pres... |
548 |
pte_t entry; |
e2d8cf405 migrate: add huge... |
549 |
|
6f4576e36 mempolicy: apply ... |
550 551 |
ptl = huge_pte_lock(hstate_vma(walk->vma), walk->mm, pte); entry = huge_ptep_get(pte); |
d4c54919e mm: add !pte_pres... |
552 553 554 |
if (!pte_present(entry)) goto unlock; page = pte_page(entry); |
88aaa2a1d mm: mempolicy: ad... |
555 |
if (!queue_pages_required(page, qp)) |
e2d8cf405 migrate: add huge... |
556 |
goto unlock; |
dcf176354 mm/mempolicy: sup... |
557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 |
if (flags == MPOL_MF_STRICT) { /* * STRICT alone means only detecting misplaced page and no * need to further check other vma. */ ret = -EIO; goto unlock; } if (!vma_migratable(walk->vma)) { /* * Must be STRICT with MOVE*, otherwise .test_walk() have * stopped walking current vma. * Detecting misplaced page but allow migrating pages which * have been queued. */ ret = 1; goto unlock; } |
e2d8cf405 migrate: add huge... |
577 578 |
/* With MPOL_MF_MOVE, we migrate only unshared hugepage. */ if (flags & (MPOL_MF_MOVE_ALL) || |
dcf176354 mm/mempolicy: sup... |
579 580 581 582 583 584 585 586 587 |
(flags & MPOL_MF_MOVE && page_mapcount(page) == 1)) { if (!isolate_huge_page(page, qp->pagelist) && (flags & MPOL_MF_STRICT)) /* * Failed to isolate page but allow migrating pages * which have been queued. */ ret = 1; } |
e2d8cf405 migrate: add huge... |
588 |
unlock: |
cb900f412 mm, hugetlb: conv... |
589 |
spin_unlock(ptl); |
e2d8cf405 migrate: add huge... |
590 591 592 |
#else BUG(); #endif |
dcf176354 mm/mempolicy: sup... |
593 |
return ret; |
1da177e4c Linux-2.6.12-rc2 |
594 |
} |
5877231f6 mm: Move change_p... |
595 |
#ifdef CONFIG_NUMA_BALANCING |
b24f53a0b mm: mempolicy: Ad... |
596 |
/* |
4b10e7d56 mm: mempolicy: Im... |
597 598 599 600 601 602 603 |
* This is used to mark a range of virtual addresses to be inaccessible. * These are later cleared by a NUMA hinting fault. Depending on these * faults, pages may be migrated for better NUMA placement. * * This is assuming that NUMA faults are handled using PROT_NONE. If * an architecture makes a different choice, it will need further * changes to the core. |
b24f53a0b mm: mempolicy: Ad... |
604 |
*/ |
4b10e7d56 mm: mempolicy: Im... |
605 606 |
unsigned long change_prot_numa(struct vm_area_struct *vma, unsigned long addr, unsigned long end) |
b24f53a0b mm: mempolicy: Ad... |
607 |
{ |
4b10e7d56 mm: mempolicy: Im... |
608 |
int nr_updated; |
b24f53a0b mm: mempolicy: Ad... |
609 |
|
58705444c mm: merge paramet... |
610 |
nr_updated = change_protection(vma, addr, end, PAGE_NONE, MM_CP_PROT_NUMA); |
03c5a6e16 mm: numa: Add pte... |
611 612 |
if (nr_updated) count_vm_numa_events(NUMA_PTE_UPDATES, nr_updated); |
b24f53a0b mm: mempolicy: Ad... |
613 |
|
4b10e7d56 mm: mempolicy: Im... |
614 |
return nr_updated; |
b24f53a0b mm: mempolicy: Ad... |
615 616 617 618 619 620 621 |
} #else static unsigned long change_prot_numa(struct vm_area_struct *vma, unsigned long addr, unsigned long end) { return 0; } |
5877231f6 mm: Move change_p... |
622 |
#endif /* CONFIG_NUMA_BALANCING */ |
b24f53a0b mm: mempolicy: Ad... |
623 |
|
6f4576e36 mempolicy: apply ... |
624 625 626 627 628 629 630 |
static int queue_pages_test_walk(unsigned long start, unsigned long end, struct mm_walk *walk) { struct vm_area_struct *vma = walk->vma; struct queue_pages *qp = walk->private; unsigned long endvma = vma->vm_end; unsigned long flags = qp->flags; |
a18b3ac25 mm/mempolicy.c: c... |
631 |
/* range check first */ |
ce33135cd mm/mempolicy: use... |
632 |
VM_BUG_ON_VMA(!range_in_vma(vma, start, end), vma); |
f18da660c mm/mempolicy.c: f... |
633 634 635 636 637 638 |
if (!qp->first) { qp->first = vma; if (!(flags & MPOL_MF_DISCONTIG_OK) && (qp->start < vma->vm_start)) /* hole at head side of range */ |
a18b3ac25 mm/mempolicy.c: c... |
639 640 |
return -EFAULT; } |
f18da660c mm/mempolicy.c: f... |
641 642 643 644 645 |
if (!(flags & MPOL_MF_DISCONTIG_OK) && ((vma->vm_end < qp->end) && (!vma->vm_next || vma->vm_end < vma->vm_next->vm_start))) /* hole at middle or tail of range */ return -EFAULT; |
a18b3ac25 mm/mempolicy.c: c... |
646 |
|
a7f40cfe3 mm: mempolicy: ma... |
647 648 649 650 651 652 |
/* * Need check MPOL_MF_STRICT to return -EIO if possible * regardless of vma_migratable */ if (!vma_migratable(vma) && !(flags & MPOL_MF_STRICT)) |
48684a65b mm: pagewalk: fix... |
653 |
return 1; |
6f4576e36 mempolicy: apply ... |
654 655 |
if (endvma > end) endvma = end; |
6f4576e36 mempolicy: apply ... |
656 |
|
6f4576e36 mempolicy: apply ... |
657 658 |
if (flags & MPOL_MF_LAZY) { /* Similar to task_numa_work, skip inaccessible VMAs */ |
3122e80ef mm/vma: make vma_... |
659 |
if (!is_vm_hugetlb_page(vma) && vma_is_accessible(vma) && |
4355c018c mm/mempolicy.c: s... |
660 |
!(vma->vm_flags & VM_MIXEDMAP)) |
6f4576e36 mempolicy: apply ... |
661 662 663 |
change_prot_numa(vma, start, endvma); return 1; } |
77bf45e78 mempolicy: do not... |
664 |
/* queue pages from current vma */ |
a7f40cfe3 mm: mempolicy: ma... |
665 |
if (flags & MPOL_MF_VALID) |
6f4576e36 mempolicy: apply ... |
666 667 668 |
return 0; return 1; } |
7b86ac337 pagewalk: separat... |
669 670 671 672 673 |
static const struct mm_walk_ops queue_pages_walk_ops = { .hugetlb_entry = queue_pages_hugetlb, .pmd_entry = queue_pages_pte_range, .test_walk = queue_pages_test_walk, }; |
dc9aa5b9d [PATCH] Swap Migr... |
674 |
/* |
980949457 mm/mempolicy: ren... |
675 676 677 678 |
* Walk through page tables and collect pages to be migrated. * * If pages found in a given range are on a set of nodes (determined by * @nodes and @flags,) it's isolated and queued to the pagelist which is |
d88354451 mm: mempolicy: ma... |
679 680 681 682 683 684 |
* passed via @private. * * queue_pages_range() has three possible return values: * 1 - there is unmovable page, but MPOL_MF_MOVE* & MPOL_MF_STRICT were * specified. * 0 - queue pages successfully or no misplaced page. |
a85dfc305 mm: mempolicy: fi... |
685 686 687 |
* errno - i.e. misplaced pages with MPOL_MF_STRICT specified (-EIO) or * memory range specified by nodemask and maxnode points outside * your accessible address space (-EFAULT) |
dc9aa5b9d [PATCH] Swap Migr... |
688 |
*/ |
d05f0cdcb mm: fix crashes f... |
689 |
static int |
980949457 mm/mempolicy: ren... |
690 |
queue_pages_range(struct mm_struct *mm, unsigned long start, unsigned long end, |
6f4576e36 mempolicy: apply ... |
691 692 |
nodemask_t *nodes, unsigned long flags, struct list_head *pagelist) |
1da177e4c Linux-2.6.12-rc2 |
693 |
{ |
f18da660c mm/mempolicy.c: f... |
694 |
int err; |
6f4576e36 mempolicy: apply ... |
695 696 697 698 |
struct queue_pages qp = { .pagelist = pagelist, .flags = flags, .nmask = nodes, |
f18da660c mm/mempolicy.c: f... |
699 700 701 |
.start = start, .end = end, .first = NULL, |
6f4576e36 mempolicy: apply ... |
702 |
}; |
6f4576e36 mempolicy: apply ... |
703 |
|
f18da660c mm/mempolicy.c: f... |
704 705 706 707 708 709 710 |
err = walk_page_range(mm, start, end, &queue_pages_walk_ops, &qp); if (!qp.first) /* whole range in hole */ err = -EFAULT; return err; |
1da177e4c Linux-2.6.12-rc2 |
711 |
} |
869833f2c mempolicy: remove... |
712 713 |
/* * Apply policy to a single VMA |
c1e8d7c6a mmap locking API:... |
714 |
* This must be called with the mmap_lock held for writing. |
869833f2c mempolicy: remove... |
715 716 717 |
*/ static int vma_replace_policy(struct vm_area_struct *vma, struct mempolicy *pol) |
8d34694c1 revert "mm: mempo... |
718 |
{ |
869833f2c mempolicy: remove... |
719 720 721 |
int err; struct mempolicy *old; struct mempolicy *new; |
8d34694c1 revert "mm: mempo... |
722 723 724 725 726 727 |
pr_debug("vma %lx-%lx/%lx vm_ops %p vm_file %p set_policy %p ", vma->vm_start, vma->vm_end, vma->vm_pgoff, vma->vm_ops, vma->vm_file, vma->vm_ops ? vma->vm_ops->set_policy : NULL); |
869833f2c mempolicy: remove... |
728 729 730 731 732 |
new = mpol_dup(pol); if (IS_ERR(new)) return PTR_ERR(new); if (vma->vm_ops && vma->vm_ops->set_policy) { |
8d34694c1 revert "mm: mempo... |
733 |
err = vma->vm_ops->set_policy(vma, new); |
869833f2c mempolicy: remove... |
734 735 |
if (err) goto err_out; |
8d34694c1 revert "mm: mempo... |
736 |
} |
869833f2c mempolicy: remove... |
737 738 |
old = vma->vm_policy; |
c1e8d7c6a mmap locking API:... |
739 |
vma->vm_policy = new; /* protected by mmap_lock */ |
869833f2c mempolicy: remove... |
740 741 742 743 744 |
mpol_put(old); return 0; err_out: mpol_put(new); |
8d34694c1 revert "mm: mempo... |
745 746 |
return err; } |
1da177e4c Linux-2.6.12-rc2 |
747 |
/* Step 2: apply policy to a range and do splits. */ |
9d8cebd4b mm: fix mbind vma... |
748 749 |
static int mbind_range(struct mm_struct *mm, unsigned long start, unsigned long end, struct mempolicy *new_pol) |
1da177e4c Linux-2.6.12-rc2 |
750 |
{ |
9d8cebd4b mm: fix mbind vma... |
751 752 753 |
struct vm_area_struct *prev; struct vm_area_struct *vma; int err = 0; |
e26a51148 mm/mempolicy.c: r... |
754 |
pgoff_t pgoff; |
9d8cebd4b mm: fix mbind vma... |
755 756 |
unsigned long vmstart; unsigned long vmend; |
1da177e4c Linux-2.6.12-rc2 |
757 |
|
097d59106 vm: avoid using f... |
758 |
vma = find_vma(mm, start); |
f18da660c mm/mempolicy.c: f... |
759 |
VM_BUG_ON(!vma); |
9d8cebd4b mm: fix mbind vma... |
760 |
|
097d59106 vm: avoid using f... |
761 |
prev = vma->vm_prev; |
e26a51148 mm/mempolicy.c: r... |
762 763 |
if (start > vma->vm_start) prev = vma; |
5e217aa2c mempolicy: mbind_... |
764 |
for (; vma && vma->vm_start < end; prev = vma, vma = vma->vm_next) { |
9d8cebd4b mm: fix mbind vma... |
765 766 |
vmstart = max(start, vma->vm_start); vmend = min(end, vma->vm_end); |
e26a51148 mm/mempolicy.c: r... |
767 768 769 770 771 |
if (mpol_equal(vma_policy(vma), new_pol)) continue; pgoff = vma->vm_pgoff + ((vmstart - vma->vm_start) >> PAGE_SHIFT); |
9d8cebd4b mm: fix mbind vma... |
772 |
prev = vma_merge(mm, prev, vmstart, vmend, vma->vm_flags, |
19a809afe userfaultfd: teac... |
773 774 |
vma->anon_vma, vma->vm_file, pgoff, new_pol, vma->vm_userfaultfd_ctx); |
9d8cebd4b mm: fix mbind vma... |
775 776 |
if (prev) { vma = prev; |
3964acd0d mm: mempolicy: fi... |
777 |
goto replace; |
9d8cebd4b mm: fix mbind vma... |
778 779 780 781 782 783 784 785 786 787 788 |
} if (vma->vm_start != vmstart) { err = split_vma(vma->vm_mm, vma, vmstart, 1); if (err) goto out; } if (vma->vm_end != vmend) { err = split_vma(vma->vm_mm, vma, vmend, 0); if (err) goto out; } |
3964acd0d mm: mempolicy: fi... |
789 |
replace: |
869833f2c mempolicy: remove... |
790 |
err = vma_replace_policy(vma, new_pol); |
8d34694c1 revert "mm: mempo... |
791 792 |
if (err) goto out; |
1da177e4c Linux-2.6.12-rc2 |
793 |
} |
9d8cebd4b mm: fix mbind vma... |
794 795 |
out: |
1da177e4c Linux-2.6.12-rc2 |
796 797 |
return err; } |
1da177e4c Linux-2.6.12-rc2 |
798 |
/* Set the process memory policy */ |
028fec414 mempolicy: suppor... |
799 800 |
static long do_set_mempolicy(unsigned short mode, unsigned short flags, nodemask_t *nodes) |
1da177e4c Linux-2.6.12-rc2 |
801 |
{ |
58568d2a8 cpuset,mm: update... |
802 |
struct mempolicy *new, *old; |
4bfc44958 mm: make set_memp... |
803 |
NODEMASK_SCRATCH(scratch); |
58568d2a8 cpuset,mm: update... |
804 |
int ret; |
1da177e4c Linux-2.6.12-rc2 |
805 |
|
4bfc44958 mm: make set_memp... |
806 807 |
if (!scratch) return -ENOMEM; |
f4e53d910 mempolicy: write ... |
808 |
|
4bfc44958 mm: make set_memp... |
809 810 811 812 813 |
new = mpol_new(mode, flags, nodes); if (IS_ERR(new)) { ret = PTR_ERR(new); goto out; } |
2c7c3a7d0 mempolicy: kill d... |
814 |
|
4bfc44958 mm: make set_memp... |
815 |
ret = mpol_set_nodemask(new, nodes, scratch); |
58568d2a8 cpuset,mm: update... |
816 |
if (ret) { |
58568d2a8 cpuset,mm: update... |
817 |
mpol_put(new); |
4bfc44958 mm: make set_memp... |
818 |
goto out; |
58568d2a8 cpuset,mm: update... |
819 |
} |
78b132e9b mm/mempolicy: rem... |
820 |
task_lock(current); |
58568d2a8 cpuset,mm: update... |
821 |
old = current->mempolicy; |
1da177e4c Linux-2.6.12-rc2 |
822 |
current->mempolicy = new; |
45816682b mm, mempolicy: st... |
823 824 |
if (new && new->mode == MPOL_INTERLEAVE) current->il_prev = MAX_NUMNODES-1; |
58568d2a8 cpuset,mm: update... |
825 |
task_unlock(current); |
58568d2a8 cpuset,mm: update... |
826 |
mpol_put(old); |
4bfc44958 mm: make set_memp... |
827 828 829 830 |
ret = 0; out: NODEMASK_SCRATCH_FREE(scratch); return ret; |
1da177e4c Linux-2.6.12-rc2 |
831 |
} |
bea904d54 mempolicy: use MP... |
832 833 |
/* * Return nodemask for policy for get_mempolicy() query |
58568d2a8 cpuset,mm: update... |
834 835 |
* * Called with task's alloc_lock held |
bea904d54 mempolicy: use MP... |
836 837 |
*/ static void get_policy_nodemask(struct mempolicy *p, nodemask_t *nodes) |
1da177e4c Linux-2.6.12-rc2 |
838 |
{ |
dfcd3c0dc [PATCH] Convert m... |
839 |
nodes_clear(*nodes); |
bea904d54 mempolicy: use MP... |
840 841 |
if (p == &default_policy) return; |
45c4745af mempolicy: rename... |
842 |
switch (p->mode) { |
19770b326 mm: filter based ... |
843 |
case MPOL_BIND: |
1da177e4c Linux-2.6.12-rc2 |
844 |
case MPOL_INTERLEAVE: |
269fbe72c mm/mempolicy: use... |
845 |
case MPOL_PREFERRED: |
b27abaccf mm/mempolicy: add... |
846 |
case MPOL_PREFERRED_MANY: |
269fbe72c mm/mempolicy: use... |
847 |
*nodes = p->nodes; |
1da177e4c Linux-2.6.12-rc2 |
848 |
break; |
7858d7bca mm/mempolicy: don... |
849 850 851 |
case MPOL_LOCAL: /* return empty node mask for local allocation */ break; |
1da177e4c Linux-2.6.12-rc2 |
852 853 854 855 |
default: BUG(); } } |
3b9aadf72 userfaultfd: allo... |
856 |
static int lookup_node(struct mm_struct *mm, unsigned long addr) |
1da177e4c Linux-2.6.12-rc2 |
857 |
{ |
ba841078c mm/mempolicy: All... |
858 |
struct page *p = NULL; |
1da177e4c Linux-2.6.12-rc2 |
859 |
int err; |
3b9aadf72 userfaultfd: allo... |
860 861 |
int locked = 1; err = get_user_pages_locked(addr & PAGE_MASK, 1, 0, &p, &locked); |
2d3a36a47 mm, mempolicy: fi... |
862 |
if (err > 0) { |
1da177e4c Linux-2.6.12-rc2 |
863 864 865 |
err = page_to_nid(p); put_page(p); } |
3b9aadf72 userfaultfd: allo... |
866 |
if (locked) |
d8ed45c5d mmap locking API:... |
867 |
mmap_read_unlock(mm); |
1da177e4c Linux-2.6.12-rc2 |
868 869 |
return err; } |
1da177e4c Linux-2.6.12-rc2 |
870 |
/* Retrieve NUMA policy */ |
dbcb0f19c mm/mempolicy.c: c... |
871 872 |
static long do_get_mempolicy(int *policy, nodemask_t *nmask, unsigned long addr, unsigned long flags) |
1da177e4c Linux-2.6.12-rc2 |
873 |
{ |
8bccd85ff [PATCH] Implement... |
874 |
int err; |
1da177e4c Linux-2.6.12-rc2 |
875 876 |
struct mm_struct *mm = current->mm; struct vm_area_struct *vma = NULL; |
3b9aadf72 userfaultfd: allo... |
877 |
struct mempolicy *pol = current->mempolicy, *pol_refcount = NULL; |
1da177e4c Linux-2.6.12-rc2 |
878 |
|
754af6f5a Mem Policy: add M... |
879 880 |
if (flags & ~(unsigned long)(MPOL_F_NODE|MPOL_F_ADDR|MPOL_F_MEMS_ALLOWED)) |
1da177e4c Linux-2.6.12-rc2 |
881 |
return -EINVAL; |
754af6f5a Mem Policy: add M... |
882 883 884 885 886 |
if (flags & MPOL_F_MEMS_ALLOWED) { if (flags & (MPOL_F_NODE|MPOL_F_ADDR)) return -EINVAL; *policy = 0; /* just so it's initialized */ |
58568d2a8 cpuset,mm: update... |
887 |
task_lock(current); |
754af6f5a Mem Policy: add M... |
888 |
*nmask = cpuset_current_mems_allowed; |
58568d2a8 cpuset,mm: update... |
889 |
task_unlock(current); |
754af6f5a Mem Policy: add M... |
890 891 |
return 0; } |
1da177e4c Linux-2.6.12-rc2 |
892 |
if (flags & MPOL_F_ADDR) { |
bea904d54 mempolicy: use MP... |
893 894 895 896 897 |
/* * Do NOT fall back to task policy if the * vma/shared policy at addr is NULL. We * want to return MPOL_DEFAULT in this case. */ |
d8ed45c5d mmap locking API:... |
898 |
mmap_read_lock(mm); |
33e3575c5 mm/mempolicy: use... |
899 |
vma = vma_lookup(mm, addr); |
1da177e4c Linux-2.6.12-rc2 |
900 |
if (!vma) { |
d8ed45c5d mmap locking API:... |
901 |
mmap_read_unlock(mm); |
1da177e4c Linux-2.6.12-rc2 |
902 903 904 905 906 907 908 909 910 911 |
return -EFAULT; } if (vma->vm_ops && vma->vm_ops->get_policy) pol = vma->vm_ops->get_policy(vma, addr); else pol = vma->vm_policy; } else if (addr) return -EINVAL; if (!pol) |
bea904d54 mempolicy: use MP... |
912 |
pol = &default_policy; /* indicates default behavior */ |
1da177e4c Linux-2.6.12-rc2 |
913 914 915 |
if (flags & MPOL_F_NODE) { if (flags & MPOL_F_ADDR) { |
3b9aadf72 userfaultfd: allo... |
916 917 |
/* * Take a refcount on the mpol, lookup_node() |
baf2f90ba mm: fix typos in ... |
918 |
* will drop the mmap_lock, so after calling |
3b9aadf72 userfaultfd: allo... |
919 920 921 922 923 924 925 |
* lookup_node() only "pol" remains valid, "vma" * is stale. */ pol_refcount = pol; vma = NULL; mpol_get(pol); err = lookup_node(mm, addr); |
1da177e4c Linux-2.6.12-rc2 |
926 927 |
if (err < 0) goto out; |
8bccd85ff [PATCH] Implement... |
928 |
*policy = err; |
1da177e4c Linux-2.6.12-rc2 |
929 |
} else if (pol == current->mempolicy && |
45c4745af mempolicy: rename... |
930 |
pol->mode == MPOL_INTERLEAVE) { |
269fbe72c mm/mempolicy: use... |
931 |
*policy = next_node_in(current->il_prev, pol->nodes); |
1da177e4c Linux-2.6.12-rc2 |
932 933 934 935 |
} else { err = -EINVAL; goto out; } |
bea904d54 mempolicy: use MP... |
936 937 938 |
} else { *policy = pol == &default_policy ? MPOL_DEFAULT : pol->mode; |
d79df630f mempolicy: mask o... |
939 940 941 942 943 |
/* * Internal mempolicy flags must be masked off before exposing * the policy to userspace. */ *policy |= (pol->flags & MPOL_MODE_FLAGS); |
bea904d54 mempolicy: use MP... |
944 |
} |
1da177e4c Linux-2.6.12-rc2 |
945 |
|
1da177e4c Linux-2.6.12-rc2 |
946 |
err = 0; |
58568d2a8 cpuset,mm: update... |
947 |
if (nmask) { |
c6b6ef8bb mempolicy: fix ge... |
948 949 950 951 952 953 954 |
if (mpol_store_user_nodemask(pol)) { *nmask = pol->w.user_nodemask; } else { task_lock(current); get_policy_nodemask(pol, nmask); task_unlock(current); } |
58568d2a8 cpuset,mm: update... |
955 |
} |
1da177e4c Linux-2.6.12-rc2 |
956 957 |
out: |
52cd3b074 mempolicy: rework... |
958 |
mpol_cond_put(pol); |
1da177e4c Linux-2.6.12-rc2 |
959 |
if (vma) |
d8ed45c5d mmap locking API:... |
960 |
mmap_read_unlock(mm); |
3b9aadf72 userfaultfd: allo... |
961 962 |
if (pol_refcount) mpol_put(pol_refcount); |
1da177e4c Linux-2.6.12-rc2 |
963 964 |
return err; } |
b20a35035 [PATCH] page migr... |
965 |
#ifdef CONFIG_MIGRATION |
8bccd85ff [PATCH] Implement... |
966 |
/* |
c86337984 mm: mempolicy: mb... |
967 |
* page migration, thp tail pages can be passed. |
6ce3c4c0f [PATCH] Move page... |
968 |
*/ |
a53190a4a mm: mempolicy: ha... |
969 |
static int migrate_page_add(struct page *page, struct list_head *pagelist, |
fc3012896 [PATCH] Simplify ... |
970 |
unsigned long flags) |
6ce3c4c0f [PATCH] Move page... |
971 |
{ |
c86337984 mm: mempolicy: mb... |
972 |
struct page *head = compound_head(page); |
6ce3c4c0f [PATCH] Move page... |
973 |
/* |
fc3012896 [PATCH] Simplify ... |
974 |
* Avoid migrating a page that is shared with others. |
6ce3c4c0f [PATCH] Move page... |
975 |
*/ |
c86337984 mm: mempolicy: mb... |
976 977 978 979 |
if ((flags & MPOL_MF_MOVE_ALL) || page_mapcount(head) == 1) { if (!isolate_lru_page(head)) { list_add_tail(&head->lru, pagelist); mod_node_page_state(page_pgdat(head), |
9de4f22a6 mm: code cleanup ... |
980 |
NR_ISOLATED_ANON + page_is_file_lru(head), |
6c357848b mm: replace hpage... |
981 |
thp_nr_pages(head)); |
a53190a4a mm: mempolicy: ha... |
982 983 984 985 986 987 988 989 990 |
} else if (flags & MPOL_MF_STRICT) { /* * Non-movable page may reach here. And, there may be * temporary off LRU pages or non-LRU movable pages. * Treat them as unmovable pages since they can't be * isolated, so they can't be moved at the moment. It * should return -EIO for this case too. */ return -EIO; |
62695a84e vmscan: move isol... |
991 992 |
} } |
a53190a4a mm: mempolicy: ha... |
993 994 |
return 0; |
7e2ab150d [PATCH] Direct Mi... |
995 |
} |
6ce3c4c0f [PATCH] Move page... |
996 |
|
7e2ab150d [PATCH] Direct Mi... |
997 998 999 1000 |
/* * Migrate pages from one node to a target node. * Returns error or the number of pages not migrated. */ |
dbcb0f19c mm/mempolicy.c: c... |
1001 1002 |
static int migrate_to_node(struct mm_struct *mm, int source, int dest, int flags) |
7e2ab150d [PATCH] Direct Mi... |
1003 1004 1005 1006 |
{ nodemask_t nmask; LIST_HEAD(pagelist); int err = 0; |
a09763116 mm/mempolicy: use... |
1007 1008 1009 1010 |
struct migration_target_control mtc = { .nid = dest, .gfp_mask = GFP_HIGHUSER_MOVABLE | __GFP_THISNODE, }; |
7e2ab150d [PATCH] Direct Mi... |
1011 1012 1013 |
nodes_clear(nmask); node_set(source, nmask); |
6ce3c4c0f [PATCH] Move page... |
1014 |
|
082708072 mm: revert 0def08... |
1015 1016 1017 1018 1019 1020 |
/* * This does not "check" the range but isolates all pages that * need migration. Between passing in the full user address * space range and MPOL_MF_DISCONTIG_OK, this call can not fail. */ VM_BUG_ON(!(flags & (MPOL_MF_MOVE | MPOL_MF_MOVE_ALL))); |
980949457 mm/mempolicy: ren... |
1021 |
queue_pages_range(mm, mm->mmap->vm_start, mm->task_size, &nmask, |
7e2ab150d [PATCH] Direct Mi... |
1022 |
flags | MPOL_MF_DISCONTIG_OK, &pagelist); |
cf608ac19 mm: compaction: f... |
1023 |
if (!list_empty(&pagelist)) { |
a09763116 mm/mempolicy: use... |
1024 |
err = migrate_pages(&pagelist, alloc_migration_target, NULL, |
5ac95884a mm/migrate: enabl... |
1025 |
(unsigned long)&mtc, MIGRATE_SYNC, MR_SYSCALL, NULL); |
cf608ac19 mm: compaction: f... |
1026 |
if (err) |
e2d8cf405 migrate: add huge... |
1027 |
putback_movable_pages(&pagelist); |
cf608ac19 mm: compaction: f... |
1028 |
} |
95a402c38 [PATCH] page migr... |
1029 |
|
7e2ab150d [PATCH] Direct Mi... |
1030 |
return err; |
6ce3c4c0f [PATCH] Move page... |
1031 1032 1033 |
} /* |
7e2ab150d [PATCH] Direct Mi... |
1034 1035 |
* Move pages between the two nodesets so as to preserve the physical * layout as much as possible. |
39743889a [PATCH] Swap Migr... |
1036 1037 1038 |
* * Returns the number of page that could not be moved. */ |
0ce72d4f7 mm: do_migrate_pa... |
1039 1040 |
int do_migrate_pages(struct mm_struct *mm, const nodemask_t *from, const nodemask_t *to, int flags) |
39743889a [PATCH] Swap Migr... |
1041 |
{ |
7e2ab150d [PATCH] Direct Mi... |
1042 |
int busy = 0; |
f555befd1 mm: migrate: init... |
1043 |
int err = 0; |
7e2ab150d [PATCH] Direct Mi... |
1044 |
nodemask_t tmp; |
39743889a [PATCH] Swap Migr... |
1045 |
|
361a2a229 mm: replace migra... |
1046 |
lru_cache_disable(); |
0aedadf91 mm: move migrate_... |
1047 |
|
d8ed45c5d mmap locking API:... |
1048 |
mmap_read_lock(mm); |
39743889a [PATCH] Swap Migr... |
1049 |
|
da0aa1389 mm/mempolicy.c: f... |
1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 |
/* * Find a 'source' bit set in 'tmp' whose corresponding 'dest' * bit in 'to' is not also set in 'tmp'. Clear the found 'source' * bit in 'tmp', and return that <source, dest> pair for migration. * The pair of nodemasks 'to' and 'from' define the map. * * If no pair of bits is found that way, fallback to picking some * pair of 'source' and 'dest' bits that are not the same. If the * 'source' and 'dest' bits are the same, this represents a node * that will be migrating to itself, so no pages need move. * * If no bits are left in 'tmp', or if all remaining bits left * in 'tmp' correspond to the same bit in 'to', return false * (nothing left to migrate). * * This lets us pick a pair of nodes to migrate between, such that * if possible the dest node is not already occupied by some other * source node, minimizing the risk of overloading the memory on a * node that would happen if we migrated incoming memory to a node * before migrating outgoing memory source that same node. * * A single scan of tmp is sufficient. As we go, we remember the * most recent <s, d> pair that moved (s != d). If we find a pair * that not only moved, but what's better, moved to an empty slot * (d is not set in tmp), then we break out then, with that pair. |
ae0e47f02 Remove one to man... |
1075 |
* Otherwise when we finish scanning from_tmp, we at least have the |
da0aa1389 mm/mempolicy.c: f... |
1076 1077 1078 1079 |
* most recent <s, d> pair that moved. If we get all the way through * the scan of tmp without finding any node that moved, much less * moved to an empty node, then there is nothing left worth migrating. */ |
d49847113 [PATCH] SwapMig: ... |
1080 |
|
0ce72d4f7 mm: do_migrate_pa... |
1081 |
tmp = *from; |
7e2ab150d [PATCH] Direct Mi... |
1082 |
while (!nodes_empty(tmp)) { |
68d68ff6e mm/mempool: minor... |
1083 |
int s, d; |
b76ac7e73 mm/mempolicy: use... |
1084 |
int source = NUMA_NO_NODE; |
7e2ab150d [PATCH] Direct Mi... |
1085 1086 1087 |
int dest = 0; for_each_node_mask(s, tmp) { |
4a5b18cc1 mm: do_migrate_pa... |
1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 |
/* * do_migrate_pages() tries to maintain the relative * node relationship of the pages established between * threads and memory areas. * * However if the number of source nodes is not equal to * the number of destination nodes we can not preserve * this node relative relationship. In that case, skip * copying memory from a node that is in the destination * mask. * * Example: [2,3,4] -> [3,4,5] moves everything. * [0-7] - > [3,4,5] moves only 0,1,2,6,7. */ |
0ce72d4f7 mm: do_migrate_pa... |
1103 1104 |
if ((nodes_weight(*from) != nodes_weight(*to)) && (node_isset(s, *to))) |
4a5b18cc1 mm: do_migrate_pa... |
1105 |
continue; |
0ce72d4f7 mm: do_migrate_pa... |
1106 |
d = node_remap(s, *from, *to); |
7e2ab150d [PATCH] Direct Mi... |
1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 |
if (s == d) continue; source = s; /* Node moved. Memorize */ dest = d; /* dest not in remaining from nodes? */ if (!node_isset(dest, tmp)) break; } |
b76ac7e73 mm/mempolicy: use... |
1117 |
if (source == NUMA_NO_NODE) |
7e2ab150d [PATCH] Direct Mi... |
1118 1119 1120 1121 1122 1123 1124 1125 |
break; node_clear(source, tmp); err = migrate_to_node(mm, source, dest, flags); if (err > 0) busy += err; if (err < 0) break; |
39743889a [PATCH] Swap Migr... |
1126 |
} |
d8ed45c5d mmap locking API:... |
1127 |
mmap_read_unlock(mm); |
d479960e4 mm: disable LRU p... |
1128 |
|
361a2a229 mm: replace migra... |
1129 |
lru_cache_enable(); |
7e2ab150d [PATCH] Direct Mi... |
1130 1131 1132 |
if (err < 0) return err; return busy; |
b20a35035 [PATCH] page migr... |
1133 1134 |
} |
3ad33b243 Migration: find c... |
1135 1136 |
/* * Allocate a new page for page migration based on vma policy. |
d05f0cdcb mm: fix crashes f... |
1137 |
* Start by assuming the page is mapped by the same vma as contains @start. |
3ad33b243 Migration: find c... |
1138 1139 1140 1141 |
* Search forward from there, if not. N.B., this assumes that the * list of pages handed to migrate_pages()--which is how we get here-- * is in virtual address order. */ |
666feb21a mm, migrate: remo... |
1142 |
static struct page *new_page(struct page *page, unsigned long start) |
95a402c38 [PATCH] page migr... |
1143 |
{ |
d05f0cdcb mm: fix crashes f... |
1144 |
struct vm_area_struct *vma; |
3f649ab72 treewide: Remove ... |
1145 |
unsigned long address; |
95a402c38 [PATCH] page migr... |
1146 |
|
d05f0cdcb mm: fix crashes f... |
1147 |
vma = find_vma(current->mm, start); |
3ad33b243 Migration: find c... |
1148 1149 1150 1151 1152 1153 |
while (vma) { address = page_address_in_vma(page, vma); if (address != -EFAULT) break; vma = vma->vm_next; } |
11c731e81 mm/mempolicy: fix... |
1154 1155 |
if (PageHuge(page)) { |
389c8178d hugetlb, mbind: f... |
1156 1157 |
return alloc_huge_page_vma(page_hstate(compound_head(page)), vma, address); |
94723aafb mm: unclutter THP... |
1158 |
} else if (PageTransHuge(page)) { |
c86337984 mm: mempolicy: mb... |
1159 |
struct page *thp; |
19deb7695 Revert "Revert "R... |
1160 1161 |
thp = alloc_hugepage_vma(GFP_TRANSHUGE, vma, address, HPAGE_PMD_ORDER); |
c86337984 mm: mempolicy: mb... |
1162 1163 1164 1165 |
if (!thp) return NULL; prep_transhuge_page(thp); return thp; |
11c731e81 mm/mempolicy: fix... |
1166 |
} |
0bf598d86 mbind: add BUG_ON... |
1167 |
/* |
11c731e81 mm/mempolicy: fix... |
1168 |
* if !vma, alloc_page_vma() will use task or system default policy |
0bf598d86 mbind: add BUG_ON... |
1169 |
*/ |
0f5568562 mm, migration: do... |
1170 1171 |
return alloc_page_vma(GFP_HIGHUSER_MOVABLE | __GFP_RETRY_MAYFAIL, vma, address); |
95a402c38 [PATCH] page migr... |
1172 |
} |
b20a35035 [PATCH] page migr... |
1173 |
#else |
a53190a4a mm: mempolicy: ha... |
1174 |
static int migrate_page_add(struct page *page, struct list_head *pagelist, |
b20a35035 [PATCH] page migr... |
1175 1176 |
unsigned long flags) { |
a53190a4a mm: mempolicy: ha... |
1177 |
return -EIO; |
39743889a [PATCH] Swap Migr... |
1178 |
} |
0ce72d4f7 mm: do_migrate_pa... |
1179 1180 |
int do_migrate_pages(struct mm_struct *mm, const nodemask_t *from, const nodemask_t *to, int flags) |
b20a35035 [PATCH] page migr... |
1181 1182 1183 |
{ return -ENOSYS; } |
95a402c38 [PATCH] page migr... |
1184 |
|
666feb21a mm, migrate: remo... |
1185 |
static struct page *new_page(struct page *page, unsigned long start) |
95a402c38 [PATCH] page migr... |
1186 1187 1188 |
{ return NULL; } |
b20a35035 [PATCH] page migr... |
1189 |
#endif |
dbcb0f19c mm/mempolicy.c: c... |
1190 |
static long do_mbind(unsigned long start, unsigned long len, |
028fec414 mempolicy: suppor... |
1191 1192 |
unsigned short mode, unsigned short mode_flags, nodemask_t *nmask, unsigned long flags) |
6ce3c4c0f [PATCH] Move page... |
1193 |
{ |
6ce3c4c0f [PATCH] Move page... |
1194 1195 1196 1197 |
struct mm_struct *mm = current->mm; struct mempolicy *new; unsigned long end; int err; |
d88354451 mm: mempolicy: ma... |
1198 |
int ret; |
6ce3c4c0f [PATCH] Move page... |
1199 |
LIST_HEAD(pagelist); |
b24f53a0b mm: mempolicy: Ad... |
1200 |
if (flags & ~(unsigned long)MPOL_MF_VALID) |
6ce3c4c0f [PATCH] Move page... |
1201 |
return -EINVAL; |
74c002410 [PATCH] Consisten... |
1202 |
if ((flags & MPOL_MF_MOVE_ALL) && !capable(CAP_SYS_NICE)) |
6ce3c4c0f [PATCH] Move page... |
1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 |
return -EPERM; if (start & ~PAGE_MASK) return -EINVAL; if (mode == MPOL_DEFAULT) flags &= ~MPOL_MF_STRICT; len = (len + PAGE_SIZE - 1) & PAGE_MASK; end = start + len; if (end < start) return -EINVAL; if (end == start) return 0; |
028fec414 mempolicy: suppor... |
1218 |
new = mpol_new(mode, mode_flags, nmask); |
6ce3c4c0f [PATCH] Move page... |
1219 1220 |
if (IS_ERR(new)) return PTR_ERR(new); |
b24f53a0b mm: mempolicy: Ad... |
1221 1222 |
if (flags & MPOL_MF_LAZY) new->flags |= MPOL_F_MOF; |
6ce3c4c0f [PATCH] Move page... |
1223 1224 1225 1226 1227 1228 |
/* * If we are using the default policy then operation * on discontinuous address spaces is okay after all */ if (!new) flags |= MPOL_MF_DISCONTIG_OK; |
028fec414 mempolicy: suppor... |
1229 1230 1231 |
pr_debug("mbind %lx-%lx mode:%d flags:%d nodes:%lx ", start, start + len, mode, mode_flags, |
00ef2d2f8 mm: use NUMA_NO_NODE |
1232 |
nmask ? nodes_addr(*nmask)[0] : NUMA_NO_NODE); |
6ce3c4c0f [PATCH] Move page... |
1233 |
|
0aedadf91 mm: move migrate_... |
1234 |
if (flags & (MPOL_MF_MOVE | MPOL_MF_MOVE_ALL)) { |
361a2a229 mm: replace migra... |
1235 |
lru_cache_disable(); |
0aedadf91 mm: move migrate_... |
1236 |
} |
4bfc44958 mm: make set_memp... |
1237 1238 1239 |
{ NODEMASK_SCRATCH(scratch); if (scratch) { |
d8ed45c5d mmap locking API:... |
1240 |
mmap_write_lock(mm); |
4bfc44958 mm: make set_memp... |
1241 |
err = mpol_set_nodemask(new, nmask, scratch); |
4bfc44958 mm: make set_memp... |
1242 |
if (err) |
d8ed45c5d mmap locking API:... |
1243 |
mmap_write_unlock(mm); |
4bfc44958 mm: make set_memp... |
1244 1245 1246 1247 |
} else err = -ENOMEM; NODEMASK_SCRATCH_FREE(scratch); } |
b05ca7385 do_mbind(): fix m... |
1248 1249 |
if (err) goto mpol_out; |
d88354451 mm: mempolicy: ma... |
1250 |
ret = queue_pages_range(mm, start, end, nmask, |
6ce3c4c0f [PATCH] Move page... |
1251 |
flags | MPOL_MF_INVERT, &pagelist); |
d88354451 mm: mempolicy: ma... |
1252 1253 |
if (ret < 0) { |
a85dfc305 mm: mempolicy: fi... |
1254 |
err = ret; |
d88354451 mm: mempolicy: ma... |
1255 1256 1257 1258 |
goto up_out; } err = mbind_range(mm, start, end, new); |
7e2ab150d [PATCH] Direct Mi... |
1259 |
|
b24f53a0b mm: mempolicy: Ad... |
1260 1261 |
if (!err) { int nr_failed = 0; |
cf608ac19 mm: compaction: f... |
1262 |
if (!list_empty(&pagelist)) { |
b24f53a0b mm: mempolicy: Ad... |
1263 |
WARN_ON_ONCE(flags & MPOL_MF_LAZY); |
d05f0cdcb mm: fix crashes f... |
1264 |
nr_failed = migrate_pages(&pagelist, new_page, NULL, |
5ac95884a mm/migrate: enabl... |
1265 |
start, MIGRATE_SYNC, MR_MEMPOLICY_MBIND, NULL); |
cf608ac19 mm: compaction: f... |
1266 |
if (nr_failed) |
74060e4d7 mm: mbind: add hu... |
1267 |
putback_movable_pages(&pagelist); |
cf608ac19 mm: compaction: f... |
1268 |
} |
6ce3c4c0f [PATCH] Move page... |
1269 |
|
d88354451 mm: mempolicy: ma... |
1270 |
if ((ret > 0) || (nr_failed && (flags & MPOL_MF_STRICT))) |
6ce3c4c0f [PATCH] Move page... |
1271 |
err = -EIO; |
a85dfc305 mm: mempolicy: fi... |
1272 |
} else { |
d88354451 mm: mempolicy: ma... |
1273 |
up_out: |
a85dfc305 mm: mempolicy: fi... |
1274 1275 1276 |
if (!list_empty(&pagelist)) putback_movable_pages(&pagelist); } |
d8ed45c5d mmap locking API:... |
1277 |
mmap_write_unlock(mm); |
d88354451 mm: mempolicy: ma... |
1278 |
mpol_out: |
f0be3d32b mempolicy: rename... |
1279 |
mpol_put(new); |
d479960e4 mm: disable LRU p... |
1280 |
if (flags & (MPOL_MF_MOVE | MPOL_MF_MOVE_ALL)) |
361a2a229 mm: replace migra... |
1281 |
lru_cache_enable(); |
6ce3c4c0f [PATCH] Move page... |
1282 1283 |
return err; } |
39743889a [PATCH] Swap Migr... |
1284 |
/* |
8bccd85ff [PATCH] Implement... |
1285 1286 |
* User space interface with variable sized bitmaps for nodelists. */ |
e130242dc mm: simplify comp... |
1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 |
static int get_bitmap(unsigned long *mask, const unsigned long __user *nmask, unsigned long maxnode) { unsigned long nlongs = BITS_TO_LONGS(maxnode); int ret; if (in_compat_syscall()) ret = compat_get_bitmap(mask, (const compat_ulong_t __user *)nmask, maxnode); else ret = copy_from_user(mask, nmask, nlongs * sizeof(unsigned long)); if (ret) return -EFAULT; if (maxnode % BITS_PER_LONG) mask[nlongs - 1] &= (1UL << (maxnode % BITS_PER_LONG)) - 1; return 0; } |
8bccd85ff [PATCH] Implement... |
1309 1310 |
/* Copy a node mask from user space. */ |
39743889a [PATCH] Swap Migr... |
1311 |
static int get_nodes(nodemask_t *nodes, const unsigned long __user *nmask, |
8bccd85ff [PATCH] Implement... |
1312 1313 |
unsigned long maxnode) { |
8bccd85ff [PATCH] Implement... |
1314 1315 1316 1317 |
--maxnode; nodes_clear(*nodes); if (maxnode == 0 || !nmask) return 0; |
a9c930bac [PATCH] Fix units... |
1318 |
if (maxnode > PAGE_SIZE*BITS_PER_BYTE) |
636f13c17 [PATCH] sys_mbind... |
1319 |
return -EINVAL; |
8bccd85ff [PATCH] Implement... |
1320 |
|
56521e7a0 mm/mempolicy: fix... |
1321 1322 |
/* * When the user specified more nodes than supported just check |
e130242dc mm: simplify comp... |
1323 1324 |
* if the non supported part is all zero, one word at a time, * starting at the end. |
56521e7a0 mm/mempolicy: fix... |
1325 |
*/ |
e130242dc mm: simplify comp... |
1326 1327 1328 |
while (maxnode > MAX_NUMNODES) { unsigned long bits = min_t(unsigned long, maxnode, BITS_PER_LONG); unsigned long t; |
8bccd85ff [PATCH] Implement... |
1329 |
|
446521544 mm/mempolicy: fix... |
1330 |
if (get_bitmap(&t, &nmask[(maxnode - 1) / BITS_PER_LONG], bits)) |
56521e7a0 mm/mempolicy: fix... |
1331 |
return -EFAULT; |
e130242dc mm: simplify comp... |
1332 1333 1334 1335 1336 1337 1338 1339 |
if (maxnode - bits >= MAX_NUMNODES) { maxnode -= bits; } else { maxnode = MAX_NUMNODES; t &= ~((1UL << (MAX_NUMNODES % BITS_PER_LONG)) - 1); } if (t) |
56521e7a0 mm/mempolicy: fix... |
1340 1341 |
return -EINVAL; } |
e130242dc mm: simplify comp... |
1342 |
return get_bitmap(nodes_addr(*nodes), nmask, maxnode); |
8bccd85ff [PATCH] Implement... |
1343 1344 1345 1346 1347 1348 1349 |
} /* Copy a kernel node mask to user space */ static int copy_nodes_to_user(unsigned long __user *mask, unsigned long maxnode, nodemask_t *nodes) { unsigned long copy = ALIGN(maxnode-1, 64) / 8; |
050c17f23 numa: change get_... |
1350 |
unsigned int nbytes = BITS_TO_LONGS(nr_node_ids) * sizeof(long); |
e130242dc mm: simplify comp... |
1351 1352 1353 1354 |
bool compat = in_compat_syscall(); if (compat) nbytes = BITS_TO_COMPAT_LONGS(nr_node_ids) * sizeof(compat_long_t); |
8bccd85ff [PATCH] Implement... |
1355 1356 1357 1358 1359 1360 1361 |
if (copy > nbytes) { if (copy > PAGE_SIZE) return -EINVAL; if (clear_user((char __user *)mask + nbytes, copy - nbytes)) return -EFAULT; copy = nbytes; |
e130242dc mm: simplify comp... |
1362 |
maxnode = nr_node_ids; |
8bccd85ff [PATCH] Implement... |
1363 |
} |
e130242dc mm: simplify comp... |
1364 1365 1366 1367 |
if (compat) return compat_put_bitmap((compat_ulong_t __user *)mask, nodes_addr(*nodes), maxnode); |
8bccd85ff [PATCH] Implement... |
1368 1369 |
return copy_to_user(mask, nodes_addr(*nodes), copy) ? -EFAULT : 0; } |
958379245 mm/mempolicy: uni... |
1370 1371 1372 1373 1374 |
/* Basic parameter sanity check used by both mbind() and set_mempolicy() */ static inline int sanitize_mpol_flags(int *mode, unsigned short *flags) { *flags = *mode & MPOL_MODE_FLAGS; *mode &= ~MPOL_MODE_FLAGS; |
b27abaccf mm/mempolicy: add... |
1375 |
|
a38a59fdf mm/mempolicy: adv... |
1376 |
if ((unsigned int)(*mode) >= MPOL_MAX) |
958379245 mm/mempolicy: uni... |
1377 1378 1379 |
return -EINVAL; if ((*flags & MPOL_F_STATIC_NODES) && (*flags & MPOL_F_RELATIVE_NODES)) return -EINVAL; |
6d2aec9e1 mm/mempolicy: do ... |
1380 1381 1382 1383 1384 |
if (*flags & MPOL_F_NUMA_BALANCING) { if (*mode != MPOL_BIND) return -EINVAL; *flags |= (MPOL_F_MOF | MPOL_F_MORON); } |
958379245 mm/mempolicy: uni... |
1385 1386 |
return 0; } |
e7dc9ad6e mm: add kernel_mb... |
1387 1388 1389 |
static long kernel_mbind(unsigned long start, unsigned long len, unsigned long mode, const unsigned long __user *nmask, unsigned long maxnode, unsigned int flags) |
8bccd85ff [PATCH] Implement... |
1390 |
{ |
958379245 mm/mempolicy: uni... |
1391 |
unsigned short mode_flags; |
8bccd85ff [PATCH] Implement... |
1392 |
nodemask_t nodes; |
958379245 mm/mempolicy: uni... |
1393 |
int lmode = mode; |
8bccd85ff [PATCH] Implement... |
1394 |
int err; |
057d33891 mm: untag user po... |
1395 |
start = untagged_addr(start); |
958379245 mm/mempolicy: uni... |
1396 1397 1398 |
err = sanitize_mpol_flags(&lmode, &mode_flags); if (err) return err; |
8bccd85ff [PATCH] Implement... |
1399 1400 1401 |
err = get_nodes(&nodes, nmask, maxnode); if (err) return err; |
958379245 mm/mempolicy: uni... |
1402 1403 |
return do_mbind(start, len, lmode, mode_flags, &nodes, flags); |
8bccd85ff [PATCH] Implement... |
1404 |
} |
e7dc9ad6e mm: add kernel_mb... |
1405 1406 1407 1408 1409 1410 |
SYSCALL_DEFINE6(mbind, unsigned long, start, unsigned long, len, unsigned long, mode, const unsigned long __user *, nmask, unsigned long, maxnode, unsigned int, flags) { return kernel_mbind(start, len, mode, nmask, maxnode, flags); } |
8bccd85ff [PATCH] Implement... |
1411 |
/* Set the process memory policy */ |
af03c4acb mm: add kernel_[s... |
1412 1413 |
static long kernel_set_mempolicy(int mode, const unsigned long __user *nmask, unsigned long maxnode) |
8bccd85ff [PATCH] Implement... |
1414 |
{ |
958379245 mm/mempolicy: uni... |
1415 |
unsigned short mode_flags; |
8bccd85ff [PATCH] Implement... |
1416 |
nodemask_t nodes; |
958379245 mm/mempolicy: uni... |
1417 1418 1419 1420 1421 1422 |
int lmode = mode; int err; err = sanitize_mpol_flags(&lmode, &mode_flags); if (err) return err; |
8bccd85ff [PATCH] Implement... |
1423 |
|
8bccd85ff [PATCH] Implement... |
1424 1425 1426 |
err = get_nodes(&nodes, nmask, maxnode); if (err) return err; |
958379245 mm/mempolicy: uni... |
1427 1428 |
return do_set_mempolicy(lmode, mode_flags, &nodes); |
8bccd85ff [PATCH] Implement... |
1429 |
} |
af03c4acb mm: add kernel_[s... |
1430 1431 1432 1433 1434 |
SYSCALL_DEFINE3(set_mempolicy, int, mode, const unsigned long __user *, nmask, unsigned long, maxnode) { return kernel_set_mempolicy(mode, nmask, maxnode); } |
b6e9b0bab mm: add kernel_mi... |
1435 1436 1437 |
static int kernel_migrate_pages(pid_t pid, unsigned long maxnode, const unsigned long __user *old_nodes, const unsigned long __user *new_nodes) |
39743889a [PATCH] Swap Migr... |
1438 |
{ |
596d7cfa2 mempolicy: reduce... |
1439 |
struct mm_struct *mm = NULL; |
39743889a [PATCH] Swap Migr... |
1440 |
struct task_struct *task; |
39743889a [PATCH] Swap Migr... |
1441 1442 |
nodemask_t task_nodes; int err; |
596d7cfa2 mempolicy: reduce... |
1443 1444 1445 1446 1447 1448 |
nodemask_t *old; nodemask_t *new; NODEMASK_SCRATCH(scratch); if (!scratch) return -ENOMEM; |
39743889a [PATCH] Swap Migr... |
1449 |
|
596d7cfa2 mempolicy: reduce... |
1450 1451 1452 1453 |
old = &scratch->mask1; new = &scratch->mask2; err = get_nodes(old, old_nodes, maxnode); |
39743889a [PATCH] Swap Migr... |
1454 |
if (err) |
596d7cfa2 mempolicy: reduce... |
1455 |
goto out; |
39743889a [PATCH] Swap Migr... |
1456 |
|
596d7cfa2 mempolicy: reduce... |
1457 |
err = get_nodes(new, new_nodes, maxnode); |
39743889a [PATCH] Swap Migr... |
1458 |
if (err) |
596d7cfa2 mempolicy: reduce... |
1459 |
goto out; |
39743889a [PATCH] Swap Migr... |
1460 1461 |
/* Find the mm_struct */ |
55cfaa3cb mm/mempolicy.c: a... |
1462 |
rcu_read_lock(); |
228ebcbe6 Uninline find_tas... |
1463 |
task = pid ? find_task_by_vpid(pid) : current; |
39743889a [PATCH] Swap Migr... |
1464 |
if (!task) { |
55cfaa3cb mm/mempolicy.c: a... |
1465 |
rcu_read_unlock(); |
596d7cfa2 mempolicy: reduce... |
1466 1467 |
err = -ESRCH; goto out; |
39743889a [PATCH] Swap Migr... |
1468 |
} |
3268c63ed mm: fix move/migr... |
1469 |
get_task_struct(task); |
39743889a [PATCH] Swap Migr... |
1470 |
|
596d7cfa2 mempolicy: reduce... |
1471 |
err = -EINVAL; |
39743889a [PATCH] Swap Migr... |
1472 1473 |
/* |
313674661 Unify migrate_pag... |
1474 1475 |
* Check if this process has the right to modify the specified process. * Use the regular "ptrace_may_access()" checks. |
39743889a [PATCH] Swap Migr... |
1476 |
*/ |
313674661 Unify migrate_pag... |
1477 |
if (!ptrace_may_access(task, PTRACE_MODE_READ_REALCREDS)) { |
c69e8d9c0 CRED: Use RCU to ... |
1478 |
rcu_read_unlock(); |
39743889a [PATCH] Swap Migr... |
1479 |
err = -EPERM; |
3268c63ed mm: fix move/migr... |
1480 |
goto out_put; |
39743889a [PATCH] Swap Migr... |
1481 |
} |
c69e8d9c0 CRED: Use RCU to ... |
1482 |
rcu_read_unlock(); |
39743889a [PATCH] Swap Migr... |
1483 1484 1485 |
task_nodes = cpuset_mems_allowed(task); /* Is the user allowed to access the target nodes? */ |
596d7cfa2 mempolicy: reduce... |
1486 |
if (!nodes_subset(*new, task_nodes) && !capable(CAP_SYS_NICE)) { |
39743889a [PATCH] Swap Migr... |
1487 |
err = -EPERM; |
3268c63ed mm: fix move/migr... |
1488 |
goto out_put; |
39743889a [PATCH] Swap Migr... |
1489 |
} |
0486a38bc mm/mempolicy: add... |
1490 1491 1492 1493 |
task_nodes = cpuset_mems_allowed(current); nodes_and(*new, *new, task_nodes); if (nodes_empty(*new)) goto out_put; |
86c3a7645 [PATCH] SELinux: ... |
1494 1495 |
err = security_task_movememory(task); if (err) |
3268c63ed mm: fix move/migr... |
1496 |
goto out_put; |
86c3a7645 [PATCH] SELinux: ... |
1497 |
|
3268c63ed mm: fix move/migr... |
1498 1499 |
mm = get_task_mm(task); put_task_struct(task); |
f2a9ef880 mm: fix NULL ptr ... |
1500 1501 |
if (!mm) { |
3268c63ed mm: fix move/migr... |
1502 |
err = -EINVAL; |
f2a9ef880 mm: fix NULL ptr ... |
1503 1504 1505 1506 1507 |
goto out; } err = do_migrate_pages(mm, old, new, capable(CAP_SYS_NICE) ? MPOL_MF_MOVE_ALL : MPOL_MF_MOVE); |
3268c63ed mm: fix move/migr... |
1508 1509 1510 |
mmput(mm); out: |
596d7cfa2 mempolicy: reduce... |
1511 |
NODEMASK_SCRATCH_FREE(scratch); |
39743889a [PATCH] Swap Migr... |
1512 |
return err; |
3268c63ed mm: fix move/migr... |
1513 1514 1515 1516 |
out_put: put_task_struct(task); goto out; |
39743889a [PATCH] Swap Migr... |
1517 |
} |
b6e9b0bab mm: add kernel_mi... |
1518 1519 1520 1521 1522 1523 |
SYSCALL_DEFINE4(migrate_pages, pid_t, pid, unsigned long, maxnode, const unsigned long __user *, old_nodes, const unsigned long __user *, new_nodes) { return kernel_migrate_pages(pid, maxnode, old_nodes, new_nodes); } |
39743889a [PATCH] Swap Migr... |
1524 |
|
8bccd85ff [PATCH] Implement... |
1525 |
/* Retrieve NUMA policy */ |
af03c4acb mm: add kernel_[s... |
1526 1527 1528 1529 1530 |
static int kernel_get_mempolicy(int __user *policy, unsigned long __user *nmask, unsigned long maxnode, unsigned long addr, unsigned long flags) |
8bccd85ff [PATCH] Implement... |
1531 |
{ |
dbcb0f19c mm/mempolicy.c: c... |
1532 |
int err; |
3f649ab72 treewide: Remove ... |
1533 |
int pval; |
8bccd85ff [PATCH] Implement... |
1534 |
nodemask_t nodes; |
050c17f23 numa: change get_... |
1535 |
if (nmask != NULL && maxnode < nr_node_ids) |
8bccd85ff [PATCH] Implement... |
1536 |
return -EINVAL; |
4605f057a mm/mempolicy.c: c... |
1537 |
addr = untagged_addr(addr); |
8bccd85ff [PATCH] Implement... |
1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 |
err = do_get_mempolicy(&pval, &nodes, addr, flags); if (err) return err; if (policy && put_user(pval, policy)) return -EFAULT; if (nmask) err = copy_nodes_to_user(nmask, maxnode, &nodes); return err; } |
af03c4acb mm: add kernel_[s... |
1551 1552 1553 1554 1555 1556 |
SYSCALL_DEFINE5(get_mempolicy, int __user *, policy, unsigned long __user *, nmask, unsigned long, maxnode, unsigned long, addr, unsigned long, flags) { return kernel_get_mempolicy(policy, nmask, maxnode, addr, flags); } |
20ca87f22 mm/mempolicy: che... |
1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 |
bool vma_migratable(struct vm_area_struct *vma) { if (vma->vm_flags & (VM_IO | VM_PFNMAP)) return false; /* * DAX device mappings require predictable access latency, so avoid * incurring periodic faults. */ if (vma_is_dax(vma)) return false; if (is_vm_hugetlb_page(vma) && !hugepage_migration_supported(hstate_vma(vma))) return false; /* * Migration allocates pages in the highest zone. If we cannot * do so then migration (at least from node to node) is not * possible. */ if (vma->vm_file && gfp_zone(mapping_gfp_mask(vma->vm_file->f_mapping)) < policy_zone) return false; return true; } |
74d2c3a05 mempolicy: introd... |
1584 1585 |
struct mempolicy *__get_vma_policy(struct vm_area_struct *vma, unsigned long addr) |
1da177e4c Linux-2.6.12-rc2 |
1586 |
{ |
8d90274b3 mempolicy: saniti... |
1587 |
struct mempolicy *pol = NULL; |
1da177e4c Linux-2.6.12-rc2 |
1588 1589 |
if (vma) { |
480eccf9a Fix NUMA Memory P... |
1590 |
if (vma->vm_ops && vma->vm_ops->get_policy) { |
8d90274b3 mempolicy: saniti... |
1591 |
pol = vma->vm_ops->get_policy(vma, addr); |
00442ad04 mempolicy: fix a ... |
1592 |
} else if (vma->vm_policy) { |
1da177e4c Linux-2.6.12-rc2 |
1593 |
pol = vma->vm_policy; |
00442ad04 mempolicy: fix a ... |
1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 |
/* * shmem_alloc_page() passes MPOL_F_SHARED policy with * a pseudo vma whose vma->vm_ops=NULL. Take a reference * count on these policies which will be dropped by * mpol_cond_put() later */ if (mpol_needs_cond_ref(pol)) mpol_get(pol); } |
1da177e4c Linux-2.6.12-rc2 |
1604 |
} |
f15ca78e3 mempolicy: change... |
1605 |
|
74d2c3a05 mempolicy: introd... |
1606 1607 1608 1609 |
return pol; } /* |
dd6eecb91 mempolicy: unexpo... |
1610 |
* get_vma_policy(@vma, @addr) |
74d2c3a05 mempolicy: introd... |
1611 1612 1613 1614 |
* @vma: virtual memory area whose policy is sought * @addr: address in @vma for shared policy lookup * * Returns effective policy for a VMA at specified address. |
dd6eecb91 mempolicy: unexpo... |
1615 |
* Falls back to current->mempolicy or system default policy, as necessary. |
74d2c3a05 mempolicy: introd... |
1616 1617 1618 1619 1620 |
* Shared policies [those marked as MPOL_F_SHARED] require an extra reference * count--added by the get_policy() vm_op, as appropriate--to protect against * freeing by another task. It is the caller's responsibility to free the * extra reference for shared policies. */ |
ac79f78da Revert "Revert "m... |
1621 |
static struct mempolicy *get_vma_policy(struct vm_area_struct *vma, |
dd6eecb91 mempolicy: unexpo... |
1622 |
unsigned long addr) |
74d2c3a05 mempolicy: introd... |
1623 1624 |
{ struct mempolicy *pol = __get_vma_policy(vma, addr); |
8d90274b3 mempolicy: saniti... |
1625 |
if (!pol) |
dd6eecb91 mempolicy: unexpo... |
1626 |
pol = get_task_policy(current); |
8d90274b3 mempolicy: saniti... |
1627 |
|
1da177e4c Linux-2.6.12-rc2 |
1628 1629 |
return pol; } |
6b6482bbf mempolicy: remove... |
1630 |
bool vma_policy_mof(struct vm_area_struct *vma) |
fc3147245 mm: numa: Limit N... |
1631 |
{ |
6b6482bbf mempolicy: remove... |
1632 |
struct mempolicy *pol; |
fc3147245 mm: numa: Limit N... |
1633 |
|
6b6482bbf mempolicy: remove... |
1634 1635 |
if (vma->vm_ops && vma->vm_ops->get_policy) { bool ret = false; |
fc3147245 mm: numa: Limit N... |
1636 |
|
6b6482bbf mempolicy: remove... |
1637 1638 1639 1640 |
pol = vma->vm_ops->get_policy(vma, vma->vm_start); if (pol && (pol->flags & MPOL_F_MOF)) ret = true; mpol_cond_put(pol); |
8d90274b3 mempolicy: saniti... |
1641 |
|
6b6482bbf mempolicy: remove... |
1642 |
return ret; |
fc3147245 mm: numa: Limit N... |
1643 |
} |
6b6482bbf mempolicy: remove... |
1644 |
pol = vma->vm_policy; |
8d90274b3 mempolicy: saniti... |
1645 |
if (!pol) |
6b6482bbf mempolicy: remove... |
1646 |
pol = get_task_policy(current); |
8d90274b3 mempolicy: saniti... |
1647 |
|
fc3147245 mm: numa: Limit N... |
1648 1649 |
return pol->flags & MPOL_F_MOF; } |
d3eb1570a mempolicy: fix is... |
1650 1651 1652 1653 1654 1655 1656 |
static int apply_policy_zone(struct mempolicy *policy, enum zone_type zone) { enum zone_type dynamic_policy_zone = policy_zone; BUG_ON(dynamic_policy_zone == ZONE_MOVABLE); /* |
269fbe72c mm/mempolicy: use... |
1657 |
* if policy->nodes has movable memory only, |
d3eb1570a mempolicy: fix is... |
1658 1659 |
* we apply policy when gfp_zone(gfp) = ZONE_MOVABLE only. * |
269fbe72c mm/mempolicy: use... |
1660 |
* policy->nodes is intersect with node_states[N_MEMORY]. |
f0953a1bb mm: fix typos in ... |
1661 |
* so if the following test fails, it implies |
269fbe72c mm/mempolicy: use... |
1662 |
* policy->nodes has movable memory only. |
d3eb1570a mempolicy: fix is... |
1663 |
*/ |
269fbe72c mm/mempolicy: use... |
1664 |
if (!nodes_intersects(policy->nodes, node_states[N_HIGH_MEMORY])) |
d3eb1570a mempolicy: fix is... |
1665 1666 1667 1668 |
dynamic_policy_zone = ZONE_MOVABLE; return zone >= dynamic_policy_zone; } |
52cd3b074 mempolicy: rework... |
1669 1670 1671 1672 |
/* * Return a nodemask representing a mempolicy for filtering nodes for * page allocation */ |
8ca39e687 mm/hugetlb: add m... |
1673 |
nodemask_t *policy_nodemask(gfp_t gfp, struct mempolicy *policy) |
19770b326 mm: filter based ... |
1674 |
{ |
b27abaccf mm/mempolicy: add... |
1675 |
int mode = policy->mode; |
19770b326 mm: filter based ... |
1676 |
/* Lower zones don't get a nodemask applied for MPOL_BIND */ |
b27abaccf mm/mempolicy: add... |
1677 1678 1679 1680 1681 1682 |
if (unlikely(mode == MPOL_BIND) && apply_policy_zone(policy, gfp_zone(gfp)) && cpuset_nodemask_valid_mems_allowed(&policy->nodes)) return &policy->nodes; if (mode == MPOL_PREFERRED_MANY) |
269fbe72c mm/mempolicy: use... |
1683 |
return &policy->nodes; |
19770b326 mm: filter based ... |
1684 1685 1686 |
return NULL; } |
b27abaccf mm/mempolicy: add... |
1687 1688 1689 1690 1691 1692 1693 |
/* * Return the preferred node id for 'prefer' mempolicy, and return * the given id for all other policies. * * policy_node() is always coupled with policy_nodemask(), which * secures the nodemask limit for 'bind' and 'prefer-many' policy. */ |
f8fd52535 mm: remove unused... |
1694 |
static int policy_node(gfp_t gfp, struct mempolicy *policy, int nd) |
1da177e4c Linux-2.6.12-rc2 |
1695 |
{ |
7858d7bca mm/mempolicy: don... |
1696 |
if (policy->mode == MPOL_PREFERRED) { |
269fbe72c mm/mempolicy: use... |
1697 |
nd = first_node(policy->nodes); |
7858d7bca mm/mempolicy: don... |
1698 |
} else { |
19770b326 mm: filter based ... |
1699 |
/* |
6d8409580 mm, mempolicy: cl... |
1700 1701 1702 |
* __GFP_THISNODE shouldn't even be used with the bind policy * because we might easily break the expectation to stay on the * requested node and not break the policy. |
19770b326 mm: filter based ... |
1703 |
*/ |
6d8409580 mm, mempolicy: cl... |
1704 |
WARN_ON_ONCE(policy->mode == MPOL_BIND && (gfp & __GFP_THISNODE)); |
1da177e4c Linux-2.6.12-rc2 |
1705 |
} |
6d8409580 mm, mempolicy: cl... |
1706 |
|
04ec6264f mm, page_alloc: p... |
1707 |
return nd; |
1da177e4c Linux-2.6.12-rc2 |
1708 1709 1710 1711 1712 |
} /* Do dynamic interleaving for a process */ static unsigned interleave_nodes(struct mempolicy *policy) { |
45816682b mm, mempolicy: st... |
1713 |
unsigned next; |
1da177e4c Linux-2.6.12-rc2 |
1714 |
struct task_struct *me = current; |
269fbe72c mm/mempolicy: use... |
1715 |
next = next_node_in(me->il_prev, policy->nodes); |
f5b087b52 mempolicy: add MP... |
1716 |
if (next < MAX_NUMNODES) |
45816682b mm, mempolicy: st... |
1717 1718 |
me->il_prev = next; return next; |
1da177e4c Linux-2.6.12-rc2 |
1719 |
} |
dc85da15d [PATCH] NUMA poli... |
1720 1721 1722 1723 |
/* * Depending on the memory policy provide a node from which to allocate the * next slab entry. */ |
2a389610a mm, mempolicy: re... |
1724 |
unsigned int mempolicy_slab_node(void) |
dc85da15d [PATCH] NUMA poli... |
1725 |
{ |
e7b691b08 slab/mempolicy: a... |
1726 |
struct mempolicy *policy; |
2a389610a mm, mempolicy: re... |
1727 |
int node = numa_mem_id(); |
e7b691b08 slab/mempolicy: a... |
1728 |
|
38b031dd4 mm/mempolicy.c: u... |
1729 |
if (!in_task()) |
2a389610a mm, mempolicy: re... |
1730 |
return node; |
e7b691b08 slab/mempolicy: a... |
1731 1732 |
policy = current->mempolicy; |
7858d7bca mm/mempolicy: don... |
1733 |
if (!policy) |
2a389610a mm, mempolicy: re... |
1734 |
return node; |
bea904d54 mempolicy: use MP... |
1735 1736 1737 |
switch (policy->mode) { case MPOL_PREFERRED: |
269fbe72c mm/mempolicy: use... |
1738 |
return first_node(policy->nodes); |
765c4507a [PATCH] GFP_THISN... |
1739 |
|
dc85da15d [PATCH] NUMA poli... |
1740 1741 |
case MPOL_INTERLEAVE: return interleave_nodes(policy); |
b27abaccf mm/mempolicy: add... |
1742 1743 1744 |
case MPOL_BIND: case MPOL_PREFERRED_MANY: { |
c33d6c06f mm, page_alloc: a... |
1745 |
struct zoneref *z; |
dc85da15d [PATCH] NUMA poli... |
1746 1747 1748 1749 |
/* * Follow bind policy behavior and start allocation at the * first node. */ |
19770b326 mm: filter based ... |
1750 |
struct zonelist *zonelist; |
19770b326 mm: filter based ... |
1751 |
enum zone_type highest_zoneidx = gfp_zone(GFP_KERNEL); |
c9634cf01 mm: use zonelist ... |
1752 |
zonelist = &NODE_DATA(node)->node_zonelists[ZONELIST_FALLBACK]; |
c33d6c06f mm, page_alloc: a... |
1753 |
z = first_zones_zonelist(zonelist, highest_zoneidx, |
269fbe72c mm/mempolicy: use... |
1754 |
&policy->nodes); |
c1093b746 mm: access zone->... |
1755 |
return z->zone ? zone_to_nid(z->zone) : node; |
dd1a239f6 mm: have zonelist... |
1756 |
} |
7858d7bca mm/mempolicy: don... |
1757 1758 |
case MPOL_LOCAL: return node; |
dc85da15d [PATCH] NUMA poli... |
1759 |
|
dc85da15d [PATCH] NUMA poli... |
1760 |
default: |
bea904d54 mempolicy: use MP... |
1761 |
BUG(); |
dc85da15d [PATCH] NUMA poli... |
1762 1763 |
} } |
fee83b3ab mm/mempolicy.c:of... |
1764 1765 |
/* * Do static interleaving for a VMA with known offset @n. Returns the n'th |
269fbe72c mm/mempolicy: use... |
1766 |
* node in pol->nodes (starting from n=0), wrapping around if n exceeds the |
fee83b3ab mm/mempolicy.c:of... |
1767 1768 |
* number of present nodes. */ |
98c70baad mm: remove useles... |
1769 |
static unsigned offset_il_node(struct mempolicy *pol, unsigned long n) |
1da177e4c Linux-2.6.12-rc2 |
1770 |
{ |
276aeee1c mm/mempolicy: fix... |
1771 1772 |
nodemask_t nodemask = pol->nodes; unsigned int target, nnodes; |
fee83b3ab mm/mempolicy.c:of... |
1773 1774 |
int i; int nid; |
276aeee1c mm/mempolicy: fix... |
1775 1776 1777 1778 1779 1780 1781 1782 |
/* * The barrier will stabilize the nodemask in a register or on * the stack so that it will stop changing under the code. * * Between first_node() and next_node(), pol->nodes could be changed * by other threads. So we put pol->nodes in a local stack. */ barrier(); |
1da177e4c Linux-2.6.12-rc2 |
1783 |
|
276aeee1c mm/mempolicy: fix... |
1784 |
nnodes = nodes_weight(nodemask); |
f5b087b52 mempolicy: add MP... |
1785 1786 |
if (!nnodes) return numa_node_id(); |
fee83b3ab mm/mempolicy.c:of... |
1787 |
target = (unsigned int)n % nnodes; |
276aeee1c mm/mempolicy: fix... |
1788 |
nid = first_node(nodemask); |
fee83b3ab mm/mempolicy.c:of... |
1789 |
for (i = 0; i < target; i++) |
276aeee1c mm/mempolicy: fix... |
1790 |
nid = next_node(nid, nodemask); |
1da177e4c Linux-2.6.12-rc2 |
1791 1792 |
return nid; } |
5da7ca860 [PATCH] Add NUMA ... |
1793 1794 1795 1796 1797 1798 |
/* Determine a node number for interleave */ static inline unsigned interleave_nid(struct mempolicy *pol, struct vm_area_struct *vma, unsigned long addr, int shift) { if (vma) { unsigned long off; |
3b98b087f [PATCH] fix NUMA ... |
1799 1800 1801 1802 1803 1804 1805 1806 1807 |
/* * for small pages, there is no difference between * shift and PAGE_SHIFT, so the bit-shift is safe. * for huge pages, since vm_pgoff is in units of small * pages, we need to shift off the always 0 bits to get * a useful offset. */ BUG_ON(shift < PAGE_SHIFT); off = vma->vm_pgoff >> (shift - PAGE_SHIFT); |
5da7ca860 [PATCH] Add NUMA ... |
1808 |
off += (addr - vma->vm_start) >> shift; |
98c70baad mm: remove useles... |
1809 |
return offset_il_node(pol, off); |
5da7ca860 [PATCH] Add NUMA ... |
1810 1811 1812 |
} else return interleave_nodes(pol); } |
00ac59adf [PATCH] x86_64: F... |
1813 |
#ifdef CONFIG_HUGETLBFS |
480eccf9a Fix NUMA Memory P... |
1814 |
/* |
04ec6264f mm, page_alloc: p... |
1815 |
* huge_node(@vma, @addr, @gfp_flags, @mpol) |
b46e14acb mm/mempolicy.c: p... |
1816 1817 1818 1819 |
* @vma: virtual memory area whose policy is sought * @addr: address in @vma for shared policy lookup and interleave policy * @gfp_flags: for requested zone * @mpol: pointer to mempolicy pointer for reference counted mempolicy |
b27abaccf mm/mempolicy: add... |
1820 |
* @nodemask: pointer to nodemask pointer for 'bind' and 'prefer-many' policy |
480eccf9a Fix NUMA Memory P... |
1821 |
* |
04ec6264f mm, page_alloc: p... |
1822 |
* Returns a nid suitable for a huge page allocation and a pointer |
52cd3b074 mempolicy: rework... |
1823 |
* to the struct mempolicy for conditional unref after allocation. |
b27abaccf mm/mempolicy: add... |
1824 1825 |
* If the effective policy is 'bind' or 'prefer-many', returns a pointer * to the mempolicy's @nodemask for filtering the zonelist. |
c0ff7453b cpuset,mm: fix no... |
1826 |
* |
d26914d11 mm: optimize put_... |
1827 |
* Must be protected by read_mems_allowed_begin() |
480eccf9a Fix NUMA Memory P... |
1828 |
*/ |
04ec6264f mm, page_alloc: p... |
1829 1830 |
int huge_node(struct vm_area_struct *vma, unsigned long addr, gfp_t gfp_flags, struct mempolicy **mpol, nodemask_t **nodemask) |
5da7ca860 [PATCH] Add NUMA ... |
1831 |
{ |
04ec6264f mm, page_alloc: p... |
1832 |
int nid; |
b27abaccf mm/mempolicy: add... |
1833 |
int mode; |
5da7ca860 [PATCH] Add NUMA ... |
1834 |
|
dd6eecb91 mempolicy: unexpo... |
1835 |
*mpol = get_vma_policy(vma, addr); |
b27abaccf mm/mempolicy: add... |
1836 1837 |
*nodemask = NULL; mode = (*mpol)->mode; |
5da7ca860 [PATCH] Add NUMA ... |
1838 |
|
b27abaccf mm/mempolicy: add... |
1839 |
if (unlikely(mode == MPOL_INTERLEAVE)) { |
04ec6264f mm, page_alloc: p... |
1840 1841 |
nid = interleave_nid(*mpol, vma, addr, huge_page_shift(hstate_vma(vma))); |
52cd3b074 mempolicy: rework... |
1842 |
} else { |
04ec6264f mm, page_alloc: p... |
1843 |
nid = policy_node(gfp_flags, *mpol, numa_node_id()); |
b27abaccf mm/mempolicy: add... |
1844 |
if (mode == MPOL_BIND || mode == MPOL_PREFERRED_MANY) |
269fbe72c mm/mempolicy: use... |
1845 |
*nodemask = &(*mpol)->nodes; |
480eccf9a Fix NUMA Memory P... |
1846 |
} |
04ec6264f mm, page_alloc: p... |
1847 |
return nid; |
5da7ca860 [PATCH] Add NUMA ... |
1848 |
} |
06808b082 hugetlb: derive h... |
1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 |
/* * init_nodemask_of_mempolicy * * If the current task's mempolicy is "default" [NULL], return 'false' * to indicate default policy. Otherwise, extract the policy nodemask * for 'bind' or 'interleave' policy into the argument nodemask, or * initialize the argument nodemask to contain the single node for * 'preferred' or 'local' policy and return 'true' to indicate presence * of non-default mempolicy. * * We don't bother with reference counting the mempolicy [mpol_get/put] * because the current task is examining it's own mempolicy and a task's * mempolicy is only ever changed by the task itself. * * N.B., it is the caller's responsibility to free a returned nodemask. */ bool init_nodemask_of_mempolicy(nodemask_t *mask) { struct mempolicy *mempolicy; |
06808b082 hugetlb: derive h... |
1869 1870 1871 |
if (!(mask && current->mempolicy)) return false; |
c0ff7453b cpuset,mm: fix no... |
1872 |
task_lock(current); |
06808b082 hugetlb: derive h... |
1873 1874 1875 |
mempolicy = current->mempolicy; switch (mempolicy->mode) { case MPOL_PREFERRED: |
b27abaccf mm/mempolicy: add... |
1876 |
case MPOL_PREFERRED_MANY: |
06808b082 hugetlb: derive h... |
1877 |
case MPOL_BIND: |
06808b082 hugetlb: derive h... |
1878 |
case MPOL_INTERLEAVE: |
269fbe72c mm/mempolicy: use... |
1879 |
*mask = mempolicy->nodes; |
7858d7bca mm/mempolicy: don... |
1880 1881 1882 |
break; case MPOL_LOCAL: |
269fbe72c mm/mempolicy: use... |
1883 |
init_nodemask_of_node(mask, numa_node_id()); |
06808b082 hugetlb: derive h... |
1884 1885 1886 1887 1888 |
break; default: BUG(); } |
c0ff7453b cpuset,mm: fix no... |
1889 |
task_unlock(current); |
06808b082 hugetlb: derive h... |
1890 1891 1892 |
return true; } |
00ac59adf [PATCH] x86_64: F... |
1893 |
#endif |
5da7ca860 [PATCH] Add NUMA ... |
1894 |
|
6f48d0ebd oom: select task ... |
1895 |
/* |
b26e517a0 mm/mempolicy: cle... |
1896 |
* mempolicy_in_oom_domain |
6f48d0ebd oom: select task ... |
1897 |
* |
b26e517a0 mm/mempolicy: cle... |
1898 1899 1900 1901 |
* If tsk's mempolicy is "bind", check for intersection between mask and * the policy nodemask. Otherwise, return true for all other policies * including "interleave", as a tsk with "interleave" policy may have * memory allocated from all nodes in system. |
6f48d0ebd oom: select task ... |
1902 1903 1904 |
* * Takes task_lock(tsk) to prevent freeing of its mempolicy. */ |
b26e517a0 mm/mempolicy: cle... |
1905 |
bool mempolicy_in_oom_domain(struct task_struct *tsk, |
6f48d0ebd oom: select task ... |
1906 1907 1908 1909 1910 1911 1912 |
const nodemask_t *mask) { struct mempolicy *mempolicy; bool ret = true; if (!mask) return ret; |
b26e517a0 mm/mempolicy: cle... |
1913 |
|
6f48d0ebd oom: select task ... |
1914 1915 |
task_lock(tsk); mempolicy = tsk->mempolicy; |
b26e517a0 mm/mempolicy: cle... |
1916 |
if (mempolicy && mempolicy->mode == MPOL_BIND) |
269fbe72c mm/mempolicy: use... |
1917 |
ret = nodes_intersects(mempolicy->nodes, *mask); |
6f48d0ebd oom: select task ... |
1918 |
task_unlock(tsk); |
b26e517a0 mm/mempolicy: cle... |
1919 |
|
6f48d0ebd oom: select task ... |
1920 1921 |
return ret; } |
1da177e4c Linux-2.6.12-rc2 |
1922 1923 |
/* Allocate a page in interleaved policy. Own path because it needs to do special accounting. */ |
662f3a0b9 [PATCH] Remove ne... |
1924 1925 |
static struct page *alloc_page_interleave(gfp_t gfp, unsigned order, unsigned nid) |
1da177e4c Linux-2.6.12-rc2 |
1926 |
{ |
1da177e4c Linux-2.6.12-rc2 |
1927 |
struct page *page; |
84172f4bb mm/page_alloc: co... |
1928 |
page = __alloc_pages(gfp, order, nid, NULL); |
4518085e1 mm, sysctl: make ... |
1929 1930 1931 |
/* skip NUMA_INTERLEAVE_HIT counter update if numa stats is disabled */ if (!static_branch_likely(&vm_numa_stat_key)) return page; |
de55c8b25 mm/mempolicy: fix... |
1932 1933 |
if (page && page_to_nid(page) == nid) { preempt_disable(); |
f19298b95 mm/vmstat: conver... |
1934 |
__count_numa_event(page_zone(page), NUMA_INTERLEAVE_HIT); |
de55c8b25 mm/mempolicy: fix... |
1935 1936 |
preempt_enable(); } |
1da177e4c Linux-2.6.12-rc2 |
1937 1938 |
return page; } |
4c54d9490 mm/memplicy: add ... |
1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 |
static struct page *alloc_pages_preferred_many(gfp_t gfp, unsigned int order, int nid, struct mempolicy *pol) { struct page *page; gfp_t preferred_gfp; /* * This is a two pass approach. The first pass will only try the * preferred nodes but skip the direct reclaim and allow the * allocation to fail, while the second pass will try all the * nodes in system. */ preferred_gfp = gfp | __GFP_NOWARN; preferred_gfp &= ~(__GFP_DIRECT_RECLAIM | __GFP_NOFAIL); page = __alloc_pages(preferred_gfp, order, nid, &pol->nodes); if (!page) page = __alloc_pages(gfp, order, numa_node_id(), NULL); return page; } |
1da177e4c Linux-2.6.12-rc2 |
1959 |
/** |
eb3507396 mm/mempolicy: rew... |
1960 1961 1962 1963 1964 1965 1966 |
* alloc_pages_vma - Allocate a page for a VMA. * @gfp: GFP flags. * @order: Order of the GFP allocation. * @vma: Pointer to VMA or NULL if not available. * @addr: Virtual address of the allocation. Must be inside @vma. * @node: Which node to prefer for allocation (modulo policy). * @hugepage: For hugepages try only the preferred node if possible. |
1da177e4c Linux-2.6.12-rc2 |
1967 |
* |
eb3507396 mm/mempolicy: rew... |
1968 1969 1970 1971 |
* Allocate a page for a specific address in @vma, using the appropriate * NUMA policy. When @vma is not NULL the caller must hold the mmap_lock * of the mm_struct of the VMA to prevent it from going away. Should be * used for all allocations for pages that will be mapped into user space. |
1da177e4c Linux-2.6.12-rc2 |
1972 |
* |
eb3507396 mm/mempolicy: rew... |
1973 |
* Return: The page on success or NULL if allocation fails. |
1da177e4c Linux-2.6.12-rc2 |
1974 |
*/ |
eb3507396 mm/mempolicy: rew... |
1975 |
struct page *alloc_pages_vma(gfp_t gfp, int order, struct vm_area_struct *vma, |
19deb7695 Revert "Revert "R... |
1976 |
unsigned long addr, int node, bool hugepage) |
1da177e4c Linux-2.6.12-rc2 |
1977 |
{ |
cc9a6c877 cpuset: mm: reduc... |
1978 |
struct mempolicy *pol; |
c0ff7453b cpuset,mm: fix no... |
1979 |
struct page *page; |
04ec6264f mm, page_alloc: p... |
1980 |
int preferred_nid; |
be97a41b2 mm/mempolicy.c: m... |
1981 |
nodemask_t *nmask; |
cc9a6c877 cpuset: mm: reduc... |
1982 |
|
dd6eecb91 mempolicy: unexpo... |
1983 |
pol = get_vma_policy(vma, addr); |
1da177e4c Linux-2.6.12-rc2 |
1984 |
|
0867a57c4 mm, thp: respect ... |
1985 1986 1987 1988 1989 1990 1991 |
if (pol->mode == MPOL_INTERLEAVE) { unsigned nid; nid = interleave_nid(pol, vma, addr, PAGE_SHIFT + order); mpol_cond_put(pol); page = alloc_page_interleave(gfp, order, nid); goto out; |
19deb7695 Revert "Revert "R... |
1992 |
} |
4c54d9490 mm/memplicy: add ... |
1993 1994 1995 1996 1997 |
if (pol->mode == MPOL_PREFERRED_MANY) { page = alloc_pages_preferred_many(gfp, order, node, pol); mpol_cond_put(pol); goto out; } |
19deb7695 Revert "Revert "R... |
1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 |
if (unlikely(IS_ENABLED(CONFIG_TRANSPARENT_HUGEPAGE) && hugepage)) { int hpage_node = node; /* * For hugepage allocation and non-interleave policy which * allows the current node (or other explicitly preferred * node) we only try to allocate from the current/preferred * node and don't fall back to other nodes, as the cost of * remote accesses would likely offset THP benefits. * |
b27abaccf mm/mempolicy: add... |
2008 |
* If the policy is interleave or does not allow the current |
19deb7695 Revert "Revert "R... |
2009 2010 |
* node in its nodemask, we allocate the standard way. */ |
7858d7bca mm/mempolicy: don... |
2011 |
if (pol->mode == MPOL_PREFERRED) |
269fbe72c mm/mempolicy: use... |
2012 |
hpage_node = first_node(pol->nodes); |
19deb7695 Revert "Revert "R... |
2013 2014 2015 2016 |
nmask = policy_nodemask(gfp, pol); if (!nmask || node_isset(hpage_node, *nmask)) { mpol_cond_put(pol); |
cc638f329 mm, thp: tweak re... |
2017 2018 2019 2020 |
/* * First, try to allocate THP only on local node, but * don't reclaim unnecessarily, just compact. */ |
19deb7695 Revert "Revert "R... |
2021 |
page = __alloc_pages_node(hpage_node, |
cc638f329 mm, thp: tweak re... |
2022 |
gfp | __GFP_THISNODE | __GFP_NORETRY, order); |
76e654cc9 mm, page_alloc: a... |
2023 2024 2025 2026 2027 |
/* * If hugepage allocations are configured to always * synchronous compact or the vma has been madvised * to prefer hugepage backing, retry allowing remote |
cc638f329 mm, thp: tweak re... |
2028 |
* memory with both reclaim and compact as well. |
76e654cc9 mm, page_alloc: a... |
2029 2030 |
*/ if (!page && (gfp & __GFP_DIRECT_RECLAIM)) |
6b2cdcc8f mm: mempolicy: fi... |
2031 |
page = __alloc_pages(gfp, order, hpage_node, nmask); |
76e654cc9 mm, page_alloc: a... |
2032 |
|
19deb7695 Revert "Revert "R... |
2033 2034 |
goto out; } |
356ff8a9a Revert "mm, thp: ... |
2035 |
} |
be97a41b2 mm/mempolicy.c: m... |
2036 |
nmask = policy_nodemask(gfp, pol); |
04ec6264f mm, page_alloc: p... |
2037 |
preferred_nid = policy_node(gfp, pol, node); |
84172f4bb mm/page_alloc: co... |
2038 |
page = __alloc_pages(gfp, order, preferred_nid, nmask); |
d51e9894d mm/mempolicy.c: d... |
2039 |
mpol_cond_put(pol); |
be97a41b2 mm/mempolicy.c: m... |
2040 |
out: |
c0ff7453b cpuset,mm: fix no... |
2041 |
return page; |
1da177e4c Linux-2.6.12-rc2 |
2042 |
} |
692622157 mm: export alloc_... |
2043 |
EXPORT_SYMBOL(alloc_pages_vma); |
1da177e4c Linux-2.6.12-rc2 |
2044 2045 |
/** |
6421ec764 mm/mempolicy: rew... |
2046 2047 2048 |
* alloc_pages - Allocate pages. * @gfp: GFP flags. * @order: Power of two of number of pages to allocate. |
1da177e4c Linux-2.6.12-rc2 |
2049 |
* |
6421ec764 mm/mempolicy: rew... |
2050 2051 2052 2053 |
* Allocate 1 << @order contiguous pages. The physical address of the * first page is naturally aligned (eg an order-3 allocation will be aligned * to a multiple of 8 * PAGE_SIZE bytes). The NUMA policy of the current * process is honoured when in process context. |
1da177e4c Linux-2.6.12-rc2 |
2054 |
* |
6421ec764 mm/mempolicy: rew... |
2055 2056 2057 |
* Context: Can be called from any context, providing the appropriate GFP * flags are used. * Return: The page on success or NULL if allocation fails. |
1da177e4c Linux-2.6.12-rc2 |
2058 |
*/ |
d7f946d0f mm/mempolicy: ren... |
2059 |
struct page *alloc_pages(gfp_t gfp, unsigned order) |
1da177e4c Linux-2.6.12-rc2 |
2060 |
{ |
8d90274b3 mempolicy: saniti... |
2061 |
struct mempolicy *pol = &default_policy; |
c0ff7453b cpuset,mm: fix no... |
2062 |
struct page *page; |
1da177e4c Linux-2.6.12-rc2 |
2063 |
|
8d90274b3 mempolicy: saniti... |
2064 2065 |
if (!in_interrupt() && !(gfp & __GFP_THISNODE)) pol = get_task_policy(current); |
52cd3b074 mempolicy: rework... |
2066 2067 2068 2069 2070 |
/* * No reference counting needed for current->mempolicy * nor system default_policy */ |
45c4745af mempolicy: rename... |
2071 |
if (pol->mode == MPOL_INTERLEAVE) |
c0ff7453b cpuset,mm: fix no... |
2072 |
page = alloc_page_interleave(gfp, order, interleave_nodes(pol)); |
4c54d9490 mm/memplicy: add ... |
2073 2074 2075 |
else if (pol->mode == MPOL_PREFERRED_MANY) page = alloc_pages_preferred_many(gfp, order, numa_node_id(), pol); |
c0ff7453b cpuset,mm: fix no... |
2076 |
else |
84172f4bb mm/page_alloc: co... |
2077 |
page = __alloc_pages(gfp, order, |
04ec6264f mm, page_alloc: p... |
2078 |
policy_node(gfp, pol, numa_node_id()), |
5c4b4be3b mm: use correct n... |
2079 |
policy_nodemask(gfp, pol)); |
cc9a6c877 cpuset: mm: reduc... |
2080 |
|
c0ff7453b cpuset,mm: fix no... |
2081 |
return page; |
1da177e4c Linux-2.6.12-rc2 |
2082 |
} |
d7f946d0f mm/mempolicy: ren... |
2083 |
EXPORT_SYMBOL(alloc_pages); |
1da177e4c Linux-2.6.12-rc2 |
2084 |
|
ef0855d33 mm: mempolicy: tu... |
2085 2086 2087 2088 2089 2090 2091 2092 2093 |
int vma_dup_policy(struct vm_area_struct *src, struct vm_area_struct *dst) { struct mempolicy *pol = mpol_dup(vma_policy(src)); if (IS_ERR(pol)) return PTR_ERR(pol); dst->vm_policy = pol; return 0; } |
4225399a6 [PATCH] cpuset: r... |
2094 |
/* |
846a16bf0 mempolicy: rename... |
2095 |
* If mpol_dup() sees current->cpuset == cpuset_being_rebound, then it |
4225399a6 [PATCH] cpuset: r... |
2096 2097 2098 2099 |
* rebinds the mempolicy its copying by calling mpol_rebind_policy() * with the mems_allowed returned by cpuset_mems_allowed(). This * keeps mempolicies cpuset relative after its cpuset moves. See * further kernel/cpuset.c update_nodemask(). |
708c1bbc9 mempolicy: restru... |
2100 2101 2102 |
* * current's mempolicy may be rebinded by the other task(the task that changes * cpuset's mems), so we needn't do rebind work for current task. |
4225399a6 [PATCH] cpuset: r... |
2103 |
*/ |
4225399a6 [PATCH] cpuset: r... |
2104 |
|
846a16bf0 mempolicy: rename... |
2105 2106 |
/* Slow path of a mempolicy duplicate */ struct mempolicy *__mpol_dup(struct mempolicy *old) |
1da177e4c Linux-2.6.12-rc2 |
2107 2108 2109 2110 2111 |
{ struct mempolicy *new = kmem_cache_alloc(policy_cache, GFP_KERNEL); if (!new) return ERR_PTR(-ENOMEM); |
708c1bbc9 mempolicy: restru... |
2112 2113 2114 2115 2116 2117 2118 2119 |
/* task's mempolicy is protected by alloc_lock */ if (old == current->mempolicy) { task_lock(current); *new = *old; task_unlock(current); } else *new = *old; |
4225399a6 [PATCH] cpuset: r... |
2120 2121 |
if (current_cpuset_is_being_rebound()) { nodemask_t mems = cpuset_mems_allowed(current); |
213980c0f mm, mempolicy: si... |
2122 |
mpol_rebind_policy(new, &mems); |
4225399a6 [PATCH] cpuset: r... |
2123 |
} |
1da177e4c Linux-2.6.12-rc2 |
2124 |
atomic_set(&new->refcnt, 1); |
1da177e4c Linux-2.6.12-rc2 |
2125 2126 2127 2128 |
return new; } /* Slow path of a mempolicy comparison */ |
fcfb4dcc9 mm/mempolicy.c: m... |
2129 |
bool __mpol_equal(struct mempolicy *a, struct mempolicy *b) |
1da177e4c Linux-2.6.12-rc2 |
2130 2131 |
{ if (!a || !b) |
fcfb4dcc9 mm/mempolicy.c: m... |
2132 |
return false; |
45c4745af mempolicy: rename... |
2133 |
if (a->mode != b->mode) |
fcfb4dcc9 mm/mempolicy.c: m... |
2134 |
return false; |
198005025 mempolicy: remove... |
2135 |
if (a->flags != b->flags) |
fcfb4dcc9 mm/mempolicy.c: m... |
2136 |
return false; |
198005025 mempolicy: remove... |
2137 2138 |
if (mpol_store_user_nodemask(a)) if (!nodes_equal(a->w.user_nodemask, b->w.user_nodemask)) |
fcfb4dcc9 mm/mempolicy.c: m... |
2139 |
return false; |
198005025 mempolicy: remove... |
2140 |
|
45c4745af mempolicy: rename... |
2141 |
switch (a->mode) { |
19770b326 mm: filter based ... |
2142 |
case MPOL_BIND: |
1da177e4c Linux-2.6.12-rc2 |
2143 |
case MPOL_INTERLEAVE: |
1da177e4c Linux-2.6.12-rc2 |
2144 |
case MPOL_PREFERRED: |
b27abaccf mm/mempolicy: add... |
2145 |
case MPOL_PREFERRED_MANY: |
269fbe72c mm/mempolicy: use... |
2146 |
return !!nodes_equal(a->nodes, b->nodes); |
7858d7bca mm/mempolicy: don... |
2147 2148 |
case MPOL_LOCAL: return true; |
1da177e4c Linux-2.6.12-rc2 |
2149 2150 |
default: BUG(); |
fcfb4dcc9 mm/mempolicy.c: m... |
2151 |
return false; |
1da177e4c Linux-2.6.12-rc2 |
2152 2153 |
} } |
1da177e4c Linux-2.6.12-rc2 |
2154 |
/* |
1da177e4c Linux-2.6.12-rc2 |
2155 2156 2157 2158 |
* Shared memory backing store policy support. * * Remember policies even when nobody has shared memory mapped. * The policies are kept in Red-Black tree linked from the inode. |
4a8c7bb59 mm/mempolicy.c: c... |
2159 |
* They are protected by the sp->lock rwlock, which should be held |
1da177e4c Linux-2.6.12-rc2 |
2160 2161 |
* for any accesses to the tree. */ |
4a8c7bb59 mm/mempolicy.c: c... |
2162 2163 2164 2165 |
/* * lookup first element intersecting start-end. Caller holds sp->lock for * reading or for writing */ |
1da177e4c Linux-2.6.12-rc2 |
2166 2167 2168 2169 2170 2171 2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 2188 2189 2190 2191 2192 2193 2194 |
static struct sp_node * sp_lookup(struct shared_policy *sp, unsigned long start, unsigned long end) { struct rb_node *n = sp->root.rb_node; while (n) { struct sp_node *p = rb_entry(n, struct sp_node, nd); if (start >= p->end) n = n->rb_right; else if (end <= p->start) n = n->rb_left; else break; } if (!n) return NULL; for (;;) { struct sp_node *w = NULL; struct rb_node *prev = rb_prev(n); if (!prev) break; w = rb_entry(prev, struct sp_node, nd); if (w->end <= start) break; n = prev; } return rb_entry(n, struct sp_node, nd); } |
4a8c7bb59 mm/mempolicy.c: c... |
2195 2196 2197 2198 |
/* * Insert a new shared policy into the list. Caller holds sp->lock for * writing. */ |
1da177e4c Linux-2.6.12-rc2 |
2199 2200 2201 2202 2203 2204 2205 2206 2207 2208 2209 2210 2211 2212 2213 2214 2215 2216 |
static void sp_insert(struct shared_policy *sp, struct sp_node *new) { struct rb_node **p = &sp->root.rb_node; struct rb_node *parent = NULL; struct sp_node *nd; while (*p) { parent = *p; nd = rb_entry(parent, struct sp_node, nd); if (new->start < nd->start) p = &(*p)->rb_left; else if (new->end > nd->end) p = &(*p)->rb_right; else BUG(); } rb_link_node(&new->nd, parent, p); rb_insert_color(&new->nd, &sp->root); |
140d5a490 numa: mempolicy: ... |
2217 2218 |
pr_debug("inserting %lx-%lx: %d ", new->start, new->end, |
45c4745af mempolicy: rename... |
2219 |
new->policy ? new->policy->mode : 0); |
1da177e4c Linux-2.6.12-rc2 |
2220 2221 2222 2223 2224 2225 2226 2227 2228 2229 2230 |
} /* Find shared policy intersecting idx */ struct mempolicy * mpol_shared_policy_lookup(struct shared_policy *sp, unsigned long idx) { struct mempolicy *pol = NULL; struct sp_node *sn; if (!sp->root.rb_node) return NULL; |
4a8c7bb59 mm/mempolicy.c: c... |
2231 |
read_lock(&sp->lock); |
1da177e4c Linux-2.6.12-rc2 |
2232 2233 2234 2235 2236 |
sn = sp_lookup(sp, idx, idx+1); if (sn) { mpol_get(sn->policy); pol = sn->policy; } |
4a8c7bb59 mm/mempolicy.c: c... |
2237 |
read_unlock(&sp->lock); |
1da177e4c Linux-2.6.12-rc2 |
2238 2239 |
return pol; } |
63f74ca21 mempolicy: fix re... |
2240 2241 2242 2243 2244 |
static void sp_free(struct sp_node *n) { mpol_put(n->policy); kmem_cache_free(sn_cache, n); } |
771fb4d80 mm: mempolicy: Ch... |
2245 2246 2247 |
/** * mpol_misplaced - check whether current page node is valid in policy * |
b46e14acb mm/mempolicy.c: p... |
2248 2249 2250 |
* @page: page to be checked * @vma: vm area where page mapped * @addr: virtual address where page mapped |
771fb4d80 mm: mempolicy: Ch... |
2251 2252 |
* * Lookup current policy node id for vma,addr and "compare to" page's |
5f076944f mm/mempolicy: fix... |
2253 |
* node id. Policy determination "mimics" alloc_page_vma(). |
771fb4d80 mm: mempolicy: Ch... |
2254 |
* Called from fault path where we know the vma and faulting address. |
5f076944f mm/mempolicy: fix... |
2255 |
* |
062db2935 mm/mempolicy: use... |
2256 2257 |
* Return: NUMA_NO_NODE if the page is in a node that is valid for this * policy, or a suitable node ID to allocate a replacement page from. |
771fb4d80 mm: mempolicy: Ch... |
2258 2259 2260 2261 |
*/ int mpol_misplaced(struct page *page, struct vm_area_struct *vma, unsigned long addr) { struct mempolicy *pol; |
c33d6c06f mm, page_alloc: a... |
2262 |
struct zoneref *z; |
771fb4d80 mm: mempolicy: Ch... |
2263 2264 |
int curnid = page_to_nid(page); unsigned long pgoff; |
90572890d mm: numa: Change ... |
2265 2266 |
int thiscpu = raw_smp_processor_id(); int thisnid = cpu_to_node(thiscpu); |
98fa15f34 mm: replace all o... |
2267 |
int polnid = NUMA_NO_NODE; |
062db2935 mm/mempolicy: use... |
2268 |
int ret = NUMA_NO_NODE; |
771fb4d80 mm: mempolicy: Ch... |
2269 |
|
dd6eecb91 mempolicy: unexpo... |
2270 |
pol = get_vma_policy(vma, addr); |
771fb4d80 mm: mempolicy: Ch... |
2271 2272 2273 2274 2275 |
if (!(pol->flags & MPOL_F_MOF)) goto out; switch (pol->mode) { case MPOL_INTERLEAVE: |
771fb4d80 mm: mempolicy: Ch... |
2276 2277 |
pgoff = vma->vm_pgoff; pgoff += (addr - vma->vm_start) >> PAGE_SHIFT; |
98c70baad mm: remove useles... |
2278 |
polnid = offset_il_node(pol, pgoff); |
771fb4d80 mm: mempolicy: Ch... |
2279 2280 2281 |
break; case MPOL_PREFERRED: |
b27abaccf mm/mempolicy: add... |
2282 2283 |
if (node_isset(curnid, pol->nodes)) goto out; |
269fbe72c mm/mempolicy: use... |
2284 |
polnid = first_node(pol->nodes); |
7858d7bca mm/mempolicy: don... |
2285 2286 2287 2288 |
break; case MPOL_LOCAL: polnid = numa_node_id(); |
771fb4d80 mm: mempolicy: Ch... |
2289 2290 2291 |
break; case MPOL_BIND: |
bda420b98 numa balancing: m... |
2292 2293 |
/* Optimize placement among multiple nodes via NUMA balancing */ if (pol->flags & MPOL_F_MORON) { |
269fbe72c mm/mempolicy: use... |
2294 |
if (node_isset(thisnid, pol->nodes)) |
bda420b98 numa balancing: m... |
2295 2296 2297 |
break; goto out; } |
b27abaccf mm/mempolicy: add... |
2298 |
fallthrough; |
c33d6c06f mm, page_alloc: a... |
2299 |
|
b27abaccf mm/mempolicy: add... |
2300 |
case MPOL_PREFERRED_MANY: |
771fb4d80 mm: mempolicy: Ch... |
2301 |
/* |
771fb4d80 mm: mempolicy: Ch... |
2302 2303 2304 2305 |
* use current page if in policy nodemask, * else select nearest allowed node, if any. * If no allowed nodes, use current [!misplaced]. */ |
269fbe72c mm/mempolicy: use... |
2306 |
if (node_isset(curnid, pol->nodes)) |
771fb4d80 mm: mempolicy: Ch... |
2307 |
goto out; |
c33d6c06f mm, page_alloc: a... |
2308 |
z = first_zones_zonelist( |
771fb4d80 mm: mempolicy: Ch... |
2309 2310 |
node_zonelist(numa_node_id(), GFP_HIGHUSER), gfp_zone(GFP_HIGHUSER), |
269fbe72c mm/mempolicy: use... |
2311 |
&pol->nodes); |
c1093b746 mm: access zone->... |
2312 |
polnid = zone_to_nid(z->zone); |
771fb4d80 mm: mempolicy: Ch... |
2313 2314 2315 2316 2317 |
break; default: BUG(); } |
5606e3877 mm: numa: Migrate... |
2318 2319 |
/* Migrate the page towards the node whose CPU is referencing it */ |
e42c8ff29 mm: numa: Use a t... |
2320 |
if (pol->flags & MPOL_F_MORON) { |
90572890d mm: numa: Change ... |
2321 |
polnid = thisnid; |
5606e3877 mm: numa: Migrate... |
2322 |
|
10f390427 sched/numa, mm: U... |
2323 |
if (!should_numa_migrate_memory(current, page, curnid, thiscpu)) |
de1c9ce6f sched/numa: Skip ... |
2324 |
goto out; |
e42c8ff29 mm: numa: Use a t... |
2325 |
} |
771fb4d80 mm: mempolicy: Ch... |
2326 2327 2328 2329 2330 2331 2332 |
if (curnid != polnid) ret = polnid; out: mpol_cond_put(pol); return ret; } |
c11600e4f mm, mempolicy: ta... |
2333 2334 2335 2336 2337 2338 2339 2340 2341 2342 2343 2344 2345 2346 2347 2348 |
/* * Drop the (possibly final) reference to task->mempolicy. It needs to be * dropped after task->mempolicy is set to NULL so that any allocation done as * part of its kmem_cache_free(), such as by KASAN, doesn't reference a freed * policy. */ void mpol_put_task_policy(struct task_struct *task) { struct mempolicy *pol; task_lock(task); pol = task->mempolicy; task->mempolicy = NULL; task_unlock(task); mpol_put(pol); } |
1da177e4c Linux-2.6.12-rc2 |
2349 2350 |
static void sp_delete(struct shared_policy *sp, struct sp_node *n) { |
140d5a490 numa: mempolicy: ... |
2351 2352 |
pr_debug("deleting %lx-l%lx ", n->start, n->end); |
1da177e4c Linux-2.6.12-rc2 |
2353 |
rb_erase(&n->nd, &sp->root); |
63f74ca21 mempolicy: fix re... |
2354 |
sp_free(n); |
1da177e4c Linux-2.6.12-rc2 |
2355 |
} |
42288fe36 mm: mempolicy: Co... |
2356 2357 2358 2359 2360 2361 2362 |
static void sp_node_init(struct sp_node *node, unsigned long start, unsigned long end, struct mempolicy *pol) { node->start = start; node->end = end; node->policy = pol; } |
dbcb0f19c mm/mempolicy.c: c... |
2363 2364 |
static struct sp_node *sp_alloc(unsigned long start, unsigned long end, struct mempolicy *pol) |
1da177e4c Linux-2.6.12-rc2 |
2365 |
{ |
869833f2c mempolicy: remove... |
2366 2367 |
struct sp_node *n; struct mempolicy *newpol; |
1da177e4c Linux-2.6.12-rc2 |
2368 |
|
869833f2c mempolicy: remove... |
2369 |
n = kmem_cache_alloc(sn_cache, GFP_KERNEL); |
1da177e4c Linux-2.6.12-rc2 |
2370 2371 |
if (!n) return NULL; |
869833f2c mempolicy: remove... |
2372 2373 2374 2375 2376 2377 2378 |
newpol = mpol_dup(pol); if (IS_ERR(newpol)) { kmem_cache_free(sn_cache, n); return NULL; } newpol->flags |= MPOL_F_SHARED; |
42288fe36 mm: mempolicy: Co... |
2379 |
sp_node_init(n, start, end, newpol); |
869833f2c mempolicy: remove... |
2380 |
|
1da177e4c Linux-2.6.12-rc2 |
2381 2382 2383 2384 2385 2386 2387 |
return n; } /* Replace a policy range. */ static int shared_policy_replace(struct shared_policy *sp, unsigned long start, unsigned long end, struct sp_node *new) { |
b22d127a3 mempolicy: fix a ... |
2388 |
struct sp_node *n; |
42288fe36 mm: mempolicy: Co... |
2389 2390 |
struct sp_node *n_new = NULL; struct mempolicy *mpol_new = NULL; |
b22d127a3 mempolicy: fix a ... |
2391 |
int ret = 0; |
1da177e4c Linux-2.6.12-rc2 |
2392 |
|
42288fe36 mm: mempolicy: Co... |
2393 |
restart: |
4a8c7bb59 mm/mempolicy.c: c... |
2394 |
write_lock(&sp->lock); |
1da177e4c Linux-2.6.12-rc2 |
2395 2396 2397 2398 2399 2400 2401 2402 2403 2404 2405 2406 |
n = sp_lookup(sp, start, end); /* Take care of old policies in the same range. */ while (n && n->start < end) { struct rb_node *next = rb_next(&n->nd); if (n->start >= start) { if (n->end <= end) sp_delete(sp, n); else n->start = end; } else { /* Old policy spanning whole new range. */ if (n->end > end) { |
42288fe36 mm: mempolicy: Co... |
2407 2408 2409 2410 2411 |
if (!n_new) goto alloc_new; *mpol_new = *n->policy; atomic_set(&mpol_new->refcnt, 1); |
7880639c3 mm/mempolicy.c: f... |
2412 |
sp_node_init(n_new, end, n->end, mpol_new); |
1da177e4c Linux-2.6.12-rc2 |
2413 |
n->end = start; |
5ca395751 mm/mempolicy.c: f... |
2414 |
sp_insert(sp, n_new); |
42288fe36 mm: mempolicy: Co... |
2415 2416 |
n_new = NULL; mpol_new = NULL; |
1da177e4c Linux-2.6.12-rc2 |
2417 2418 2419 2420 2421 2422 2423 2424 2425 2426 |
break; } else n->end = start; } if (!next) break; n = rb_entry(next, struct sp_node, nd); } if (new) sp_insert(sp, new); |
4a8c7bb59 mm/mempolicy.c: c... |
2427 |
write_unlock(&sp->lock); |
42288fe36 mm: mempolicy: Co... |
2428 2429 2430 2431 2432 2433 2434 |
ret = 0; err_out: if (mpol_new) mpol_put(mpol_new); if (n_new) kmem_cache_free(sn_cache, n_new); |
b22d127a3 mempolicy: fix a ... |
2435 |
return ret; |
42288fe36 mm: mempolicy: Co... |
2436 2437 |
alloc_new: |
4a8c7bb59 mm/mempolicy.c: c... |
2438 |
write_unlock(&sp->lock); |
42288fe36 mm: mempolicy: Co... |
2439 2440 2441 2442 2443 2444 2445 |
ret = -ENOMEM; n_new = kmem_cache_alloc(sn_cache, GFP_KERNEL); if (!n_new) goto err_out; mpol_new = kmem_cache_alloc(policy_cache, GFP_KERNEL); if (!mpol_new) goto err_out; |
198932a14 mm/mempolicy: fix... |
2446 |
atomic_set(&mpol_new->refcnt, 1); |
42288fe36 mm: mempolicy: Co... |
2447 |
goto restart; |
1da177e4c Linux-2.6.12-rc2 |
2448 |
} |
71fe804b6 mempolicy: use st... |
2449 2450 2451 2452 2453 2454 2455 2456 |
/** * mpol_shared_policy_init - initialize shared policy for inode * @sp: pointer to inode shared policy * @mpol: struct mempolicy to install * * Install non-NULL @mpol in inode's shared policy rb-tree. * On entry, the current task has a reference on a non-NULL @mpol. * This must be released on exit. |
4bfc44958 mm: make set_memp... |
2457 |
* This is called at get_inode() calls and we can use GFP_KERNEL. |
71fe804b6 mempolicy: use st... |
2458 2459 2460 |
*/ void mpol_shared_policy_init(struct shared_policy *sp, struct mempolicy *mpol) { |
58568d2a8 cpuset,mm: update... |
2461 |
int ret; |
71fe804b6 mempolicy: use st... |
2462 |
sp->root = RB_ROOT; /* empty tree == default mempolicy */ |
4a8c7bb59 mm/mempolicy.c: c... |
2463 |
rwlock_init(&sp->lock); |
71fe804b6 mempolicy: use st... |
2464 2465 2466 2467 |
if (mpol) { struct vm_area_struct pvma; struct mempolicy *new; |
4bfc44958 mm: make set_memp... |
2468 |
NODEMASK_SCRATCH(scratch); |
71fe804b6 mempolicy: use st... |
2469 |
|
4bfc44958 mm: make set_memp... |
2470 |
if (!scratch) |
5c0c16549 mempolicy: fix da... |
2471 |
goto put_mpol; |
71fe804b6 mempolicy: use st... |
2472 2473 |
/* contextualize the tmpfs mount point mempolicy */ new = mpol_new(mpol->mode, mpol->flags, &mpol->w.user_nodemask); |
15d77835a mempolicy: factor... |
2474 |
if (IS_ERR(new)) |
0cae3457b mempolicy: ERR_PT... |
2475 |
goto free_scratch; /* no valid nodemask intersection */ |
58568d2a8 cpuset,mm: update... |
2476 2477 |
task_lock(current); |
4bfc44958 mm: make set_memp... |
2478 |
ret = mpol_set_nodemask(new, &mpol->w.user_nodemask, scratch); |
58568d2a8 cpuset,mm: update... |
2479 |
task_unlock(current); |
15d77835a mempolicy: factor... |
2480 |
if (ret) |
5c0c16549 mempolicy: fix da... |
2481 |
goto put_new; |
71fe804b6 mempolicy: use st... |
2482 2483 |
/* Create pseudo-vma that contains just the policy */ |
2c4541e24 mm: use vma_init(... |
2484 |
vma_init(&pvma, NULL); |
71fe804b6 mempolicy: use st... |
2485 2486 |
pvma.vm_end = TASK_SIZE; /* policy covers entire file */ mpol_set_shared_policy(sp, &pvma, new); /* adds ref */ |
15d77835a mempolicy: factor... |
2487 |
|
5c0c16549 mempolicy: fix da... |
2488 |
put_new: |
71fe804b6 mempolicy: use st... |
2489 |
mpol_put(new); /* drop initial ref */ |
0cae3457b mempolicy: ERR_PT... |
2490 |
free_scratch: |
4bfc44958 mm: make set_memp... |
2491 |
NODEMASK_SCRATCH_FREE(scratch); |
5c0c16549 mempolicy: fix da... |
2492 2493 |
put_mpol: mpol_put(mpol); /* drop our incoming ref on sb mpol */ |
7339ff830 [PATCH] Add tmpfs... |
2494 2495 |
} } |
1da177e4c Linux-2.6.12-rc2 |
2496 2497 2498 2499 2500 2501 |
int mpol_set_shared_policy(struct shared_policy *info, struct vm_area_struct *vma, struct mempolicy *npol) { int err; struct sp_node *new = NULL; unsigned long sz = vma_pages(vma); |
028fec414 mempolicy: suppor... |
2502 2503 |
pr_debug("set_shared_policy %lx sz %lu %d %d %lx ", |
1da177e4c Linux-2.6.12-rc2 |
2504 |
vma->vm_pgoff, |
45c4745af mempolicy: rename... |
2505 |
sz, npol ? npol->mode : -1, |
028fec414 mempolicy: suppor... |
2506 |
npol ? npol->flags : -1, |
269fbe72c mm/mempolicy: use... |
2507 |
npol ? nodes_addr(npol->nodes)[0] : NUMA_NO_NODE); |
1da177e4c Linux-2.6.12-rc2 |
2508 2509 2510 2511 2512 2513 2514 2515 |
if (npol) { new = sp_alloc(vma->vm_pgoff, vma->vm_pgoff + sz, npol); if (!new) return -ENOMEM; } err = shared_policy_replace(info, vma->vm_pgoff, vma->vm_pgoff+sz, new); if (err && new) |
63f74ca21 mempolicy: fix re... |
2516 |
sp_free(new); |
1da177e4c Linux-2.6.12-rc2 |
2517 2518 2519 2520 2521 2522 2523 2524 2525 2526 2527 |
return err; } /* Free a backing policy store on inode delete. */ void mpol_free_shared_policy(struct shared_policy *p) { struct sp_node *n; struct rb_node *next; if (!p->root.rb_node) return; |
4a8c7bb59 mm/mempolicy.c: c... |
2528 |
write_lock(&p->lock); |
1da177e4c Linux-2.6.12-rc2 |
2529 2530 2531 2532 |
next = rb_first(&p->root); while (next) { n = rb_entry(next, struct sp_node, nd); next = rb_next(&n->nd); |
63f74ca21 mempolicy: fix re... |
2533 |
sp_delete(p, n); |
1da177e4c Linux-2.6.12-rc2 |
2534 |
} |
4a8c7bb59 mm/mempolicy.c: c... |
2535 |
write_unlock(&p->lock); |
1da177e4c Linux-2.6.12-rc2 |
2536 |
} |
1a687c2e9 mm: sched: numa: ... |
2537 |
#ifdef CONFIG_NUMA_BALANCING |
c297663c0 mm: numa: initial... |
2538 |
static int __initdata numabalancing_override; |
1a687c2e9 mm: sched: numa: ... |
2539 2540 2541 2542 2543 2544 2545 |
static void __init check_numabalancing_enable(void) { bool numabalancing_default = false; if (IS_ENABLED(CONFIG_NUMA_BALANCING_DEFAULT_ENABLED)) numabalancing_default = true; |
c297663c0 mm: numa: initial... |
2546 2547 2548 |
/* Parsed by setup_numabalancing. override == 1 enables, -1 disables */ if (numabalancing_override) set_numabalancing_state(numabalancing_override == 1); |
b0dc2b9bb mm, numa: really ... |
2549 |
if (num_online_nodes() > 1 && !numabalancing_override) { |
756a025f0 mm: coalesce spli... |
2550 2551 |
pr_info("%s automatic NUMA balancing. Configure with numa_balancing= or the kernel.numa_balancing sysctl ", |
c297663c0 mm: numa: initial... |
2552 |
numabalancing_default ? "Enabling" : "Disabling"); |
1a687c2e9 mm: sched: numa: ... |
2553 2554 2555 2556 2557 2558 2559 2560 2561 |
set_numabalancing_state(numabalancing_default); } } static int __init setup_numabalancing(char *str) { int ret = 0; if (!str) goto out; |
1a687c2e9 mm: sched: numa: ... |
2562 2563 |
if (!strcmp(str, "enable")) { |
c297663c0 mm: numa: initial... |
2564 |
numabalancing_override = 1; |
1a687c2e9 mm: sched: numa: ... |
2565 2566 |
ret = 1; } else if (!strcmp(str, "disable")) { |
c297663c0 mm: numa: initial... |
2567 |
numabalancing_override = -1; |
1a687c2e9 mm: sched: numa: ... |
2568 2569 2570 2571 |
ret = 1; } out: if (!ret) |
4a404bea9 mm/mempolicy.c: c... |
2572 2573 |
pr_warn("Unable to parse numa_balancing= "); |
1a687c2e9 mm: sched: numa: ... |
2574 2575 2576 2577 2578 2579 2580 2581 2582 |
return ret; } __setup("numa_balancing=", setup_numabalancing); #else static inline void __init check_numabalancing_enable(void) { } #endif /* CONFIG_NUMA_BALANCING */ |
1da177e4c Linux-2.6.12-rc2 |
2583 2584 2585 |
/* assumes fs == KERNEL_DS */ void __init numa_policy_init(void) { |
b71636e29 numa: mempolicy: ... |
2586 2587 2588 |
nodemask_t interleave_nodes; unsigned long largest = 0; int nid, prefer = 0; |
1da177e4c Linux-2.6.12-rc2 |
2589 2590 |
policy_cache = kmem_cache_create("numa_policy", sizeof(struct mempolicy), |
20c2df83d mm: Remove slab d... |
2591 |
0, SLAB_PANIC, NULL); |
1da177e4c Linux-2.6.12-rc2 |
2592 2593 2594 |
sn_cache = kmem_cache_create("shared_policy_node", sizeof(struct sp_node), |
20c2df83d mm: Remove slab d... |
2595 |
0, SLAB_PANIC, NULL); |
1da177e4c Linux-2.6.12-rc2 |
2596 |
|
5606e3877 mm: numa: Migrate... |
2597 2598 2599 2600 2601 |
for_each_node(nid) { preferred_node_policy[nid] = (struct mempolicy) { .refcnt = ATOMIC_INIT(1), .mode = MPOL_PREFERRED, .flags = MPOL_F_MOF | MPOL_F_MORON, |
269fbe72c mm/mempolicy: use... |
2602 |
.nodes = nodemask_of_node(nid), |
5606e3877 mm: numa: Migrate... |
2603 2604 |
}; } |
b71636e29 numa: mempolicy: ... |
2605 2606 2607 2608 2609 2610 |
/* * Set interleaving policy for system init. Interleaving is only * enabled across suitably sized nodes (default is >= 16MB), or * fall back to the largest node if they're all smaller. */ nodes_clear(interleave_nodes); |
01f13bd60 mempolicy: use N_... |
2611 |
for_each_node_state(nid, N_MEMORY) { |
b71636e29 numa: mempolicy: ... |
2612 2613 2614 2615 2616 2617 2618 2619 2620 2621 2622 2623 2624 2625 2626 2627 |
unsigned long total_pages = node_present_pages(nid); /* Preserve the largest node */ if (largest < total_pages) { largest = total_pages; prefer = nid; } /* Interleave this node? */ if ((total_pages << PAGE_SHIFT) >= (16 << 20)) node_set(nid, interleave_nodes); } /* All too small, use the largest */ if (unlikely(nodes_empty(interleave_nodes))) node_set(prefer, interleave_nodes); |
1da177e4c Linux-2.6.12-rc2 |
2628 |
|
028fec414 mempolicy: suppor... |
2629 |
if (do_set_mempolicy(MPOL_INTERLEAVE, 0, &interleave_nodes)) |
b1de0d139 mm: convert some ... |
2630 2631 |
pr_err("%s: interleaving failed ", __func__); |
1a687c2e9 mm: sched: numa: ... |
2632 2633 |
check_numabalancing_enable(); |
1da177e4c Linux-2.6.12-rc2 |
2634 |
} |
8bccd85ff [PATCH] Implement... |
2635 |
/* Reset policy of current process to default */ |
1da177e4c Linux-2.6.12-rc2 |
2636 2637 |
void numa_default_policy(void) { |
028fec414 mempolicy: suppor... |
2638 |
do_set_mempolicy(MPOL_DEFAULT, 0, NULL); |
1da177e4c Linux-2.6.12-rc2 |
2639 |
} |
68860ec10 [PATCH] cpusets: ... |
2640 |
|
4225399a6 [PATCH] cpuset: r... |
2641 |
/* |
095f1fc4e mempolicy: rework... |
2642 2643 |
* Parse and format mempolicy from/to strings */ |
345ace9c7 mempolicy: rename... |
2644 2645 2646 2647 2648 2649 |
static const char * const policy_modes[] = { [MPOL_DEFAULT] = "default", [MPOL_PREFERRED] = "prefer", [MPOL_BIND] = "bind", [MPOL_INTERLEAVE] = "interleave", |
d3a710337 mm: mempolicy: Ad... |
2650 |
[MPOL_LOCAL] = "local", |
b27abaccf mm/mempolicy: add... |
2651 |
[MPOL_PREFERRED_MANY] = "prefer (many)", |
345ace9c7 mempolicy: rename... |
2652 |
}; |
1a75a6c82 [PATCH] Fold numa... |
2653 |
|
095f1fc4e mempolicy: rework... |
2654 2655 2656 |
#ifdef CONFIG_TMPFS /** |
f2a07f40d tmpfs mempolicy: ... |
2657 |
* mpol_parse_str - parse string to mempolicy, for tmpfs mpol mount option. |
095f1fc4e mempolicy: rework... |
2658 |
* @str: string containing mempolicy to parse |
71fe804b6 mempolicy: use st... |
2659 |
* @mpol: pointer to struct mempolicy pointer, returned on success. |
095f1fc4e mempolicy: rework... |
2660 2661 2662 2663 |
* * Format of input: * <mode>[=<flags>][:<nodelist>] * |
71fe804b6 mempolicy: use st... |
2664 |
* On success, returns 0, else 1 |
095f1fc4e mempolicy: rework... |
2665 |
*/ |
a7a88b237 mempolicy: remove... |
2666 |
int mpol_parse_str(char *str, struct mempolicy **mpol) |
095f1fc4e mempolicy: rework... |
2667 |
{ |
71fe804b6 mempolicy: use st... |
2668 |
struct mempolicy *new = NULL; |
f2a07f40d tmpfs mempolicy: ... |
2669 |
unsigned short mode_flags; |
71fe804b6 mempolicy: use st... |
2670 |
nodemask_t nodes; |
095f1fc4e mempolicy: rework... |
2671 2672 |
char *nodelist = strchr(str, ':'); char *flags = strchr(str, '='); |
dedf2c73b mm/mempolicy.c: u... |
2673 |
int err = 1, mode; |
095f1fc4e mempolicy: rework... |
2674 |
|
c7a91bc7c mm/mempolicy.c: f... |
2675 2676 |
if (flags) *flags++ = '\0'; /* terminate mode string */ |
095f1fc4e mempolicy: rework... |
2677 2678 2679 |
if (nodelist) { /* NUL-terminate mode or flags string */ *nodelist++ = '\0'; |
71fe804b6 mempolicy: use st... |
2680 |
if (nodelist_parse(nodelist, nodes)) |
095f1fc4e mempolicy: rework... |
2681 |
goto out; |
01f13bd60 mempolicy: use N_... |
2682 |
if (!nodes_subset(nodes, node_states[N_MEMORY])) |
095f1fc4e mempolicy: rework... |
2683 |
goto out; |
71fe804b6 mempolicy: use st... |
2684 2685 |
} else nodes_clear(nodes); |
dedf2c73b mm/mempolicy.c: u... |
2686 2687 |
mode = match_string(policy_modes, MPOL_MAX, str); if (mode < 0) |
095f1fc4e mempolicy: rework... |
2688 |
goto out; |
71fe804b6 mempolicy: use st... |
2689 |
switch (mode) { |
095f1fc4e mempolicy: rework... |
2690 |
case MPOL_PREFERRED: |
71fe804b6 mempolicy: use st... |
2691 |
/* |
aa9f7d517 mm: mempolicy: re... |
2692 2693 2694 |
* Insist on a nodelist of one node only, although later * we use first_node(nodes) to grab a single node, so here * nodelist (or nodes) cannot be empty. |
71fe804b6 mempolicy: use st... |
2695 |
*/ |
095f1fc4e mempolicy: rework... |
2696 2697 2698 2699 |
if (nodelist) { char *rest = nodelist; while (isdigit(*rest)) rest++; |
926f2ae04 tmpfs: cleanup mp... |
2700 2701 |
if (*rest) goto out; |
aa9f7d517 mm: mempolicy: re... |
2702 2703 |
if (nodes_empty(nodes)) goto out; |
095f1fc4e mempolicy: rework... |
2704 2705 |
} break; |
095f1fc4e mempolicy: rework... |
2706 2707 2708 2709 2710 |
case MPOL_INTERLEAVE: /* * Default to online nodes with memory if no nodelist */ if (!nodelist) |
01f13bd60 mempolicy: use N_... |
2711 |
nodes = node_states[N_MEMORY]; |
3f226aa1c mempolicy: suppor... |
2712 |
break; |
71fe804b6 mempolicy: use st... |
2713 |
case MPOL_LOCAL: |
3f226aa1c mempolicy: suppor... |
2714 |
/* |
71fe804b6 mempolicy: use st... |
2715 |
* Don't allow a nodelist; mpol_new() checks flags |
3f226aa1c mempolicy: suppor... |
2716 |
*/ |
71fe804b6 mempolicy: use st... |
2717 |
if (nodelist) |
3f226aa1c mempolicy: suppor... |
2718 |
goto out; |
3f226aa1c mempolicy: suppor... |
2719 |
break; |
413b43dea tmpfs: fix oops o... |
2720 2721 2722 2723 2724 2725 2726 |
case MPOL_DEFAULT: /* * Insist on a empty nodelist */ if (!nodelist) err = 0; goto out; |
b27abaccf mm/mempolicy: add... |
2727 |
case MPOL_PREFERRED_MANY: |
d69b2e63e tmpfs: mpol=bind:... |
2728 2729 2730 2731 2732 2733 |
case MPOL_BIND: /* * Insist on a nodelist */ if (!nodelist) goto out; |
095f1fc4e mempolicy: rework... |
2734 |
} |
71fe804b6 mempolicy: use st... |
2735 |
mode_flags = 0; |
095f1fc4e mempolicy: rework... |
2736 2737 2738 2739 2740 2741 |
if (flags) { /* * Currently, we only support two mutually exclusive * mode flags. */ if (!strcmp(flags, "static")) |
71fe804b6 mempolicy: use st... |
2742 |
mode_flags |= MPOL_F_STATIC_NODES; |
095f1fc4e mempolicy: rework... |
2743 |
else if (!strcmp(flags, "relative")) |
71fe804b6 mempolicy: use st... |
2744 |
mode_flags |= MPOL_F_RELATIVE_NODES; |
095f1fc4e mempolicy: rework... |
2745 |
else |
926f2ae04 tmpfs: cleanup mp... |
2746 |
goto out; |
095f1fc4e mempolicy: rework... |
2747 |
} |
71fe804b6 mempolicy: use st... |
2748 2749 2750 |
new = mpol_new(mode, mode_flags, &nodes); if (IS_ERR(new)) |
926f2ae04 tmpfs: cleanup mp... |
2751 |
goto out; |
f2a07f40d tmpfs mempolicy: ... |
2752 2753 2754 2755 |
/* * Save nodes for mpol_to_str() to show the tmpfs mount options * for /proc/mounts, /proc/pid/mounts and /proc/pid/mountinfo. */ |
269fbe72c mm/mempolicy: use... |
2756 2757 2758 2759 2760 2761 |
if (mode != MPOL_PREFERRED) { new->nodes = nodes; } else if (nodelist) { nodes_clear(new->nodes); node_set(first_node(nodes), new->nodes); } else { |
7858d7bca mm/mempolicy: don... |
2762 |
new->mode = MPOL_LOCAL; |
269fbe72c mm/mempolicy: use... |
2763 |
} |
f2a07f40d tmpfs mempolicy: ... |
2764 2765 2766 2767 2768 2769 |
/* * Save nodes for contextualization: this will be used to "clone" * the mempolicy in a specific context [cpuset] at a later time. */ new->w.user_nodemask = nodes; |
926f2ae04 tmpfs: cleanup mp... |
2770 |
err = 0; |
71fe804b6 mempolicy: use st... |
2771 |
|
095f1fc4e mempolicy: rework... |
2772 2773 2774 2775 2776 2777 |
out: /* Restore string for error message */ if (nodelist) *--nodelist = ':'; if (flags) *--flags = '='; |
71fe804b6 mempolicy: use st... |
2778 2779 |
if (!err) *mpol = new; |
095f1fc4e mempolicy: rework... |
2780 2781 2782 |
return err; } #endif /* CONFIG_TMPFS */ |
71fe804b6 mempolicy: use st... |
2783 2784 2785 2786 2787 |
/** * mpol_to_str - format a mempolicy structure for printing * @buffer: to contain formatted mempolicy string * @maxlen: length of @buffer * @pol: pointer to mempolicy to be formatted |
71fe804b6 mempolicy: use st... |
2788 |
* |
948927ee9 mm, mempolicy: ma... |
2789 2790 2791 |
* Convert @pol into a string. If @buffer is too short, truncate the string. * Recommend a @maxlen of at least 32 for the longest mode, "interleave", the * longest flag, "relative", and to display at least a few node ids. |
1a75a6c82 [PATCH] Fold numa... |
2792 |
*/ |
948927ee9 mm, mempolicy: ma... |
2793 |
void mpol_to_str(char *buffer, int maxlen, struct mempolicy *pol) |
1a75a6c82 [PATCH] Fold numa... |
2794 2795 |
{ char *p = buffer; |
948927ee9 mm, mempolicy: ma... |
2796 2797 2798 |
nodemask_t nodes = NODE_MASK_NONE; unsigned short mode = MPOL_DEFAULT; unsigned short flags = 0; |
2291990ab mempolicy: clean-... |
2799 |
|
8790c71a1 mm/mempolicy.c: f... |
2800 |
if (pol && pol != &default_policy && !(pol->flags & MPOL_F_MORON)) { |
bea904d54 mempolicy: use MP... |
2801 |
mode = pol->mode; |
948927ee9 mm, mempolicy: ma... |
2802 2803 |
flags = pol->flags; } |
bea904d54 mempolicy: use MP... |
2804 |
|
1a75a6c82 [PATCH] Fold numa... |
2805 2806 |
switch (mode) { case MPOL_DEFAULT: |
7858d7bca mm/mempolicy: don... |
2807 |
case MPOL_LOCAL: |
1a75a6c82 [PATCH] Fold numa... |
2808 |
break; |
1a75a6c82 [PATCH] Fold numa... |
2809 |
case MPOL_PREFERRED: |
b27abaccf mm/mempolicy: add... |
2810 |
case MPOL_PREFERRED_MANY: |
1a75a6c82 [PATCH] Fold numa... |
2811 |
case MPOL_BIND: |
1a75a6c82 [PATCH] Fold numa... |
2812 |
case MPOL_INTERLEAVE: |
269fbe72c mm/mempolicy: use... |
2813 |
nodes = pol->nodes; |
1a75a6c82 [PATCH] Fold numa... |
2814 |
break; |
1a75a6c82 [PATCH] Fold numa... |
2815 |
default: |
948927ee9 mm, mempolicy: ma... |
2816 2817 2818 |
WARN_ON_ONCE(1); snprintf(p, maxlen, "unknown"); return; |
1a75a6c82 [PATCH] Fold numa... |
2819 |
} |
b7a9f420e mm, mempolicy: si... |
2820 |
p += snprintf(p, maxlen, "%s", policy_modes[mode]); |
1a75a6c82 [PATCH] Fold numa... |
2821 |
|
fc36b8d3d mempolicy: use MP... |
2822 |
if (flags & MPOL_MODE_FLAGS) { |
948927ee9 mm, mempolicy: ma... |
2823 |
p += snprintf(p, buffer + maxlen - p, "="); |
f5b087b52 mempolicy: add MP... |
2824 |
|
2291990ab mempolicy: clean-... |
2825 2826 2827 |
/* * Currently, the only defined flags are mutually exclusive */ |
f5b087b52 mempolicy: add MP... |
2828 |
if (flags & MPOL_F_STATIC_NODES) |
2291990ab mempolicy: clean-... |
2829 2830 2831 |
p += snprintf(p, buffer + maxlen - p, "static"); else if (flags & MPOL_F_RELATIVE_NODES) p += snprintf(p, buffer + maxlen - p, "relative"); |
f5b087b52 mempolicy: add MP... |
2832 |
} |
9e763e0f4 mm: use %*pb[l] t... |
2833 2834 2835 |
if (!nodes_empty(nodes)) p += scnprintf(p, buffer + maxlen - p, ":%*pbl", nodemask_pr_args(&nodes)); |
1a75a6c82 [PATCH] Fold numa... |
2836 |
} |
20b51af15 mm/migrate: add s... |
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bool numa_demotion_enabled = false; #ifdef CONFIG_SYSFS static ssize_t numa_demotion_enabled_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf) { return sysfs_emit(buf, "%s ", numa_demotion_enabled? "true" : "false"); } static ssize_t numa_demotion_enabled_store(struct kobject *kobj, struct kobj_attribute *attr, const char *buf, size_t count) { if (!strncmp(buf, "true", 4) || !strncmp(buf, "1", 1)) numa_demotion_enabled = true; else if (!strncmp(buf, "false", 5) || !strncmp(buf, "0", 1)) numa_demotion_enabled = false; else return -EINVAL; return count; } static struct kobj_attribute numa_demotion_enabled_attr = __ATTR(demotion_enabled, 0644, numa_demotion_enabled_show, numa_demotion_enabled_store); static struct attribute *numa_attrs[] = { &numa_demotion_enabled_attr.attr, NULL, }; static const struct attribute_group numa_attr_group = { .attrs = numa_attrs, }; static int __init numa_init_sysfs(void) { int err; struct kobject *numa_kobj; numa_kobj = kobject_create_and_add("numa", mm_kobj); if (!numa_kobj) { pr_err("failed to create numa kobject "); return -ENOMEM; } err = sysfs_create_group(numa_kobj, &numa_attr_group); if (err) { pr_err("failed to register numa group "); goto delete_obj; } return 0; delete_obj: kobject_put(numa_kobj); return err; } subsys_initcall(numa_init_sysfs); #endif |