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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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* 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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/* 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_PREFERRED, |
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.flags = MPOL_F_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_interleave(struct mempolicy *pol, const nodemask_t *nodes) { if (nodes_empty(*nodes)) return -EINVAL; pol->v.nodes = *nodes; return 0; } static int mpol_new_preferred(struct mempolicy *pol, const nodemask_t *nodes) { if (!nodes) |
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pol->flags |= MPOL_F_LOCAL; /* local allocation */ |
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else if (nodes_empty(*nodes)) return -EINVAL; /* no allowed nodes */ else pol->v.preferred_node = first_node(*nodes); return 0; } static int mpol_new_bind(struct mempolicy *pol, const nodemask_t *nodes) { |
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if (nodes_empty(*nodes)) |
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return -EINVAL; pol->v.nodes = *nodes; 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 * parameter with respect to the policy mode and flags. But, we need to * handle an empty nodemask with MPOL_PREFERRED here. * * 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; /* if mode is MPOL_DEFAULT, pol is NULL. This is right. */ if (pol == NULL) return 0; |
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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); if (pol->mode == MPOL_PREFERRED && nodes_empty(*nodes)) nodes = NULL; /* explicit local allocation */ else { if (pol->flags & MPOL_F_RELATIVE_NODES) |
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mpol_relative_nodemask(&nsc->mask2, nodes, &nsc->mask1); |
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else |
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nodes_and(nsc->mask2, *nodes, nsc->mask1); |
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if (mpol_store_user_nodemask(pol)) pol->w.user_nodemask = *nodes; else pol->w.cpuset_mems_allowed = cpuset_current_mems_allowed; } |
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if (nodes) ret = mpol_ops[pol->mode].create(pol, &nsc->mask2); else ret = mpol_ops[pol->mode].create(pol, NULL); |
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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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} |
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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); mode = MPOL_PREFERRED; |
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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->v.nodes,pol->w.cpuset_mems_allowed, *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->v.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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{ nodemask_t tmp; |
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if (pol->flags & MPOL_F_STATIC_NODES) { int node = first_node(pol->w.user_nodemask); |
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if (node_isset(node, *nodes)) { |
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pol->v.preferred_node = node; |
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pol->flags &= ~MPOL_F_LOCAL; } else pol->flags |= MPOL_F_LOCAL; |
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} else if (pol->flags & MPOL_F_RELATIVE_NODES) { mpol_relative_nodemask(&tmp, &pol->w.user_nodemask, nodes); pol->v.preferred_node = first_node(tmp); |
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} else if (!(pol->flags & MPOL_F_LOCAL)) { |
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pol->v.preferred_node = node_remap(pol->v.preferred_node, pol->w.cpuset_mems_allowed, *nodes); 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) return; |
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if (!mpol_store_user_nodemask(pol) && !(pol->flags & MPOL_F_LOCAL) && |
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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] = { .create = mpol_new_interleave, .rebind = mpol_rebind_nodemask, }, [MPOL_PREFERRED] = { .create = mpol_new_preferred, .rebind = mpol_rebind_preferred, }, [MPOL_BIND] = { .create = mpol_new_bind, .rebind = mpol_rebind_nodemask, }, }; |
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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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struct queue_pages { struct list_head *pagelist; unsigned long flags; nodemask_t *nmask; |
f18da660c mm/mempolicy.c: f... |
415 416 417 |
unsigned long start; unsigned long end; struct vm_area_struct *first; |
6f4576e36 mempolicy: apply ... |
418 |
}; |
980949457 mm/mempolicy: ren... |
419 |
/* |
88aaa2a1d mm: mempolicy: ad... |
420 421 422 423 424 425 426 427 428 429 430 431 432 |
* 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... |
433 |
/* |
d88354451 mm: mempolicy: ma... |
434 435 436 437 438 439 440 441 |
* queue_pages_pmd() has four possible return values: * 0 - pages are placed on the right node or queued successfully. * 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... |
442 |
*/ |
c86337984 mm: mempolicy: mb... |
443 444 |
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... |
445 |
__releases(ptl) |
c86337984 mm: mempolicy: mb... |
446 447 448 449 450 451 452 |
{ 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... |
453 |
ret = -EIO; |
c86337984 mm: mempolicy: mb... |
454 455 456 457 458 459 |
goto unlock; } page = pmd_page(*pmd); if (is_huge_zero_page(page)) { spin_unlock(ptl); __split_huge_pmd(walk->vma, pmd, addr, false, NULL); |
d88354451 mm: mempolicy: ma... |
460 |
ret = 2; |
c86337984 mm: mempolicy: mb... |
461 462 |
goto out; } |
d88354451 mm: mempolicy: ma... |
463 |
if (!queue_pages_required(page, qp)) |
c86337984 mm: mempolicy: mb... |
464 |
goto unlock; |
c86337984 mm: mempolicy: mb... |
465 |
|
c86337984 mm: mempolicy: mb... |
466 467 |
flags = qp->flags; /* go to thp migration */ |
a7f40cfe3 mm: mempolicy: ma... |
468 |
if (flags & (MPOL_MF_MOVE | MPOL_MF_MOVE_ALL)) { |
a53190a4a mm: mempolicy: ha... |
469 470 |
if (!vma_migratable(walk->vma) || migrate_page_add(page, qp->pagelist, flags)) { |
d88354451 mm: mempolicy: ma... |
471 |
ret = 1; |
a7f40cfe3 mm: mempolicy: ma... |
472 473 |
goto unlock; } |
a7f40cfe3 mm: mempolicy: ma... |
474 475 |
} else ret = -EIO; |
c86337984 mm: mempolicy: mb... |
476 477 478 479 480 |
unlock: spin_unlock(ptl); out: return ret; } |
88aaa2a1d mm: mempolicy: ad... |
481 |
/* |
980949457 mm/mempolicy: ren... |
482 483 |
* Scan through pages checking if pages follow certain conditions, * and move them to the pagelist if they do. |
d88354451 mm: mempolicy: ma... |
484 485 486 487 488 489 490 |
* * queue_pages_pte_range() has three possible return values: * 0 - pages are placed on the right node or queued successfully. * 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... |
491 |
*/ |
6f4576e36 mempolicy: apply ... |
492 493 |
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 |
494 |
{ |
6f4576e36 mempolicy: apply ... |
495 496 497 498 |
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... |
499 |
int ret; |
d88354451 mm: mempolicy: ma... |
500 |
bool has_unmovable = false; |
3f0884209 mm: mempolicy: fi... |
501 |
pte_t *pte, *mapped_pte; |
705e87c0c [PATCH] mm: pte_o... |
502 |
spinlock_t *ptl; |
941150a32 [PATCH] mbind: fi... |
503 |
|
c86337984 mm: mempolicy: mb... |
504 505 506 |
ptl = pmd_trans_huge_lock(pmd, vma); if (ptl) { ret = queue_pages_pmd(pmd, ptl, addr, end, walk); |
d88354451 mm: mempolicy: ma... |
507 |
if (ret != 2) |
a7f40cfe3 mm: mempolicy: ma... |
508 |
return ret; |
248db92da migrate_pages: tr... |
509 |
} |
d88354451 mm: mempolicy: ma... |
510 |
/* THP was split, fall through to pte walk */ |
91612e0df [PATCH] mbind: ch... |
511 |
|
337d9abf1 mm: thp: check pm... |
512 513 |
if (pmd_trans_unstable(pmd)) return 0; |
94723aafb mm: unclutter THP... |
514 |
|
3f0884209 mm: mempolicy: fi... |
515 |
mapped_pte = pte = pte_offset_map_lock(walk->mm, pmd, addr, &ptl); |
6f4576e36 mempolicy: apply ... |
516 |
for (; addr != end; pte++, addr += PAGE_SIZE) { |
91612e0df [PATCH] mbind: ch... |
517 |
if (!pte_present(*pte)) |
1da177e4c Linux-2.6.12-rc2 |
518 |
continue; |
6aab341e0 mm: re-architect ... |
519 520 |
page = vm_normal_page(vma, addr, *pte); if (!page) |
1da177e4c Linux-2.6.12-rc2 |
521 |
continue; |
053837fce [PATCH] mm: migra... |
522 |
/* |
62b61f611 ksm: memory hotre... |
523 524 |
* vm_normal_page() filters out zero pages, but there might * still be PageReserved pages to skip, perhaps in a VDSO. |
053837fce [PATCH] mm: migra... |
525 |
*/ |
b79bc0a0c ksm: enable KSM p... |
526 |
if (PageReserved(page)) |
f4598c8b3 [PATCH] migration... |
527 |
continue; |
88aaa2a1d mm: mempolicy: ad... |
528 |
if (!queue_pages_required(page, qp)) |
38e35860d [PATCH] mempolici... |
529 |
continue; |
a7f40cfe3 mm: mempolicy: ma... |
530 |
if (flags & (MPOL_MF_MOVE | MPOL_MF_MOVE_ALL)) { |
d88354451 mm: mempolicy: ma... |
531 532 533 |
/* MPOL_MF_STRICT must be specified if we get here */ if (!vma_migratable(vma)) { has_unmovable = true; |
a7f40cfe3 mm: mempolicy: ma... |
534 |
break; |
d88354451 mm: mempolicy: ma... |
535 |
} |
a53190a4a mm: mempolicy: ha... |
536 537 538 539 540 541 542 543 |
/* * 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... |
544 545 |
} else break; |
6f4576e36 mempolicy: apply ... |
546 |
} |
3f0884209 mm: mempolicy: fi... |
547 |
pte_unmap_unlock(mapped_pte, ptl); |
6f4576e36 mempolicy: apply ... |
548 |
cond_resched(); |
d88354451 mm: mempolicy: ma... |
549 550 551 |
if (has_unmovable) return 1; |
a7f40cfe3 mm: mempolicy: ma... |
552 |
return addr != end ? -EIO : 0; |
91612e0df [PATCH] mbind: ch... |
553 |
} |
6f4576e36 mempolicy: apply ... |
554 555 556 |
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... |
557 |
{ |
dcf176354 mm/mempolicy: sup... |
558 |
int ret = 0; |
e2d8cf405 migrate: add huge... |
559 |
#ifdef CONFIG_HUGETLB_PAGE |
6f4576e36 mempolicy: apply ... |
560 |
struct queue_pages *qp = walk->private; |
dcf176354 mm/mempolicy: sup... |
561 |
unsigned long flags = (qp->flags & MPOL_MF_VALID); |
e2d8cf405 migrate: add huge... |
562 |
struct page *page; |
cb900f412 mm, hugetlb: conv... |
563 |
spinlock_t *ptl; |
d4c54919e mm: add !pte_pres... |
564 |
pte_t entry; |
e2d8cf405 migrate: add huge... |
565 |
|
6f4576e36 mempolicy: apply ... |
566 567 |
ptl = huge_pte_lock(hstate_vma(walk->vma), walk->mm, pte); entry = huge_ptep_get(pte); |
d4c54919e mm: add !pte_pres... |
568 569 570 |
if (!pte_present(entry)) goto unlock; page = pte_page(entry); |
88aaa2a1d mm: mempolicy: ad... |
571 |
if (!queue_pages_required(page, qp)) |
e2d8cf405 migrate: add huge... |
572 |
goto unlock; |
dcf176354 mm/mempolicy: sup... |
573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 |
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... |
593 594 |
/* With MPOL_MF_MOVE, we migrate only unshared hugepage. */ if (flags & (MPOL_MF_MOVE_ALL) || |
dcf176354 mm/mempolicy: sup... |
595 596 597 598 599 600 601 602 603 |
(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... |
604 |
unlock: |
cb900f412 mm, hugetlb: conv... |
605 |
spin_unlock(ptl); |
e2d8cf405 migrate: add huge... |
606 607 608 |
#else BUG(); #endif |
dcf176354 mm/mempolicy: sup... |
609 |
return ret; |
1da177e4c Linux-2.6.12-rc2 |
610 |
} |
5877231f6 mm: Move change_p... |
611 |
#ifdef CONFIG_NUMA_BALANCING |
b24f53a0b mm: mempolicy: Ad... |
612 |
/* |
4b10e7d56 mm: mempolicy: Im... |
613 614 615 616 617 618 619 |
* 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... |
620 |
*/ |
4b10e7d56 mm: mempolicy: Im... |
621 622 |
unsigned long change_prot_numa(struct vm_area_struct *vma, unsigned long addr, unsigned long end) |
b24f53a0b mm: mempolicy: Ad... |
623 |
{ |
4b10e7d56 mm: mempolicy: Im... |
624 |
int nr_updated; |
b24f53a0b mm: mempolicy: Ad... |
625 |
|
58705444c mm: merge paramet... |
626 |
nr_updated = change_protection(vma, addr, end, PAGE_NONE, MM_CP_PROT_NUMA); |
03c5a6e16 mm: numa: Add pte... |
627 628 |
if (nr_updated) count_vm_numa_events(NUMA_PTE_UPDATES, nr_updated); |
b24f53a0b mm: mempolicy: Ad... |
629 |
|
4b10e7d56 mm: mempolicy: Im... |
630 |
return nr_updated; |
b24f53a0b mm: mempolicy: Ad... |
631 632 633 634 635 636 637 |
} #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... |
638 |
#endif /* CONFIG_NUMA_BALANCING */ |
b24f53a0b mm: mempolicy: Ad... |
639 |
|
6f4576e36 mempolicy: apply ... |
640 641 642 643 644 645 646 |
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... |
647 |
/* range check first */ |
d888fb2b1 mm: mempolicy: us... |
648 |
VM_BUG_ON_VMA((vma->vm_start > start) || (vma->vm_end < end), vma); |
f18da660c mm/mempolicy.c: f... |
649 650 651 652 653 654 |
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... |
655 656 |
return -EFAULT; } |
f18da660c mm/mempolicy.c: f... |
657 658 659 660 661 |
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... |
662 |
|
a7f40cfe3 mm: mempolicy: ma... |
663 664 665 666 667 668 |
/* * 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... |
669 |
return 1; |
6f4576e36 mempolicy: apply ... |
670 671 |
if (endvma > end) endvma = end; |
6f4576e36 mempolicy: apply ... |
672 |
|
6f4576e36 mempolicy: apply ... |
673 674 |
if (flags & MPOL_MF_LAZY) { /* Similar to task_numa_work, skip inaccessible VMAs */ |
3122e80ef mm/vma: make vma_... |
675 |
if (!is_vm_hugetlb_page(vma) && vma_is_accessible(vma) && |
4355c018c mm/mempolicy.c: s... |
676 |
!(vma->vm_flags & VM_MIXEDMAP)) |
6f4576e36 mempolicy: apply ... |
677 678 679 |
change_prot_numa(vma, start, endvma); return 1; } |
77bf45e78 mempolicy: do not... |
680 |
/* queue pages from current vma */ |
a7f40cfe3 mm: mempolicy: ma... |
681 |
if (flags & MPOL_MF_VALID) |
6f4576e36 mempolicy: apply ... |
682 683 684 |
return 0; return 1; } |
7b86ac337 pagewalk: separat... |
685 686 687 688 689 |
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... |
690 |
/* |
980949457 mm/mempolicy: ren... |
691 692 693 694 |
* 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... |
695 696 697 698 699 700 |
* 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... |
701 702 703 |
* 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... |
704 |
*/ |
d05f0cdcb mm: fix crashes f... |
705 |
static int |
980949457 mm/mempolicy: ren... |
706 |
queue_pages_range(struct mm_struct *mm, unsigned long start, unsigned long end, |
6f4576e36 mempolicy: apply ... |
707 708 |
nodemask_t *nodes, unsigned long flags, struct list_head *pagelist) |
1da177e4c Linux-2.6.12-rc2 |
709 |
{ |
f18da660c mm/mempolicy.c: f... |
710 |
int err; |
6f4576e36 mempolicy: apply ... |
711 712 713 714 |
struct queue_pages qp = { .pagelist = pagelist, .flags = flags, .nmask = nodes, |
f18da660c mm/mempolicy.c: f... |
715 716 717 |
.start = start, .end = end, .first = NULL, |
6f4576e36 mempolicy: apply ... |
718 |
}; |
6f4576e36 mempolicy: apply ... |
719 |
|
f18da660c mm/mempolicy.c: f... |
720 721 722 723 724 725 726 |
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 |
727 |
} |
869833f2c mempolicy: remove... |
728 729 |
/* * Apply policy to a single VMA |
c1e8d7c6a mmap locking API:... |
730 |
* This must be called with the mmap_lock held for writing. |
869833f2c mempolicy: remove... |
731 732 733 |
*/ static int vma_replace_policy(struct vm_area_struct *vma, struct mempolicy *pol) |
8d34694c1 revert "mm: mempo... |
734 |
{ |
869833f2c mempolicy: remove... |
735 736 737 |
int err; struct mempolicy *old; struct mempolicy *new; |
8d34694c1 revert "mm: mempo... |
738 739 740 741 742 743 |
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... |
744 745 746 747 748 |
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... |
749 |
err = vma->vm_ops->set_policy(vma, new); |
869833f2c mempolicy: remove... |
750 751 |
if (err) goto err_out; |
8d34694c1 revert "mm: mempo... |
752 |
} |
869833f2c mempolicy: remove... |
753 754 |
old = vma->vm_policy; |
c1e8d7c6a mmap locking API:... |
755 |
vma->vm_policy = new; /* protected by mmap_lock */ |
869833f2c mempolicy: remove... |
756 757 758 759 760 |
mpol_put(old); return 0; err_out: mpol_put(new); |
8d34694c1 revert "mm: mempo... |
761 762 |
return err; } |
1da177e4c Linux-2.6.12-rc2 |
763 |
/* Step 2: apply policy to a range and do splits. */ |
9d8cebd4b mm: fix mbind vma... |
764 765 |
static int mbind_range(struct mm_struct *mm, unsigned long start, unsigned long end, struct mempolicy *new_pol) |
1da177e4c Linux-2.6.12-rc2 |
766 767 |
{ struct vm_area_struct *next; |
9d8cebd4b mm: fix mbind vma... |
768 769 770 |
struct vm_area_struct *prev; struct vm_area_struct *vma; int err = 0; |
e26a51148 mm/mempolicy.c: r... |
771 |
pgoff_t pgoff; |
9d8cebd4b mm: fix mbind vma... |
772 773 |
unsigned long vmstart; unsigned long vmend; |
1da177e4c Linux-2.6.12-rc2 |
774 |
|
097d59106 vm: avoid using f... |
775 |
vma = find_vma(mm, start); |
f18da660c mm/mempolicy.c: f... |
776 |
VM_BUG_ON(!vma); |
9d8cebd4b mm: fix mbind vma... |
777 |
|
097d59106 vm: avoid using f... |
778 |
prev = vma->vm_prev; |
e26a51148 mm/mempolicy.c: r... |
779 780 |
if (start > vma->vm_start) prev = vma; |
9d8cebd4b mm: fix mbind vma... |
781 |
for (; vma && vma->vm_start < end; prev = vma, vma = next) { |
1da177e4c Linux-2.6.12-rc2 |
782 |
next = vma->vm_next; |
9d8cebd4b mm: fix mbind vma... |
783 784 |
vmstart = max(start, vma->vm_start); vmend = min(end, vma->vm_end); |
e26a51148 mm/mempolicy.c: r... |
785 786 787 788 789 |
if (mpol_equal(vma_policy(vma), new_pol)) continue; pgoff = vma->vm_pgoff + ((vmstart - vma->vm_start) >> PAGE_SHIFT); |
9d8cebd4b mm: fix mbind vma... |
790 |
prev = vma_merge(mm, prev, vmstart, vmend, vma->vm_flags, |
19a809afe userfaultfd: teac... |
791 |
vma->anon_vma, vma->vm_file, pgoff, |
60500a422 ANDROID: mm: add ... |
792 793 |
new_pol, vma->vm_userfaultfd_ctx, vma_get_anon_name(vma)); |
9d8cebd4b mm: fix mbind vma... |
794 795 796 |
if (prev) { vma = prev; next = vma->vm_next; |
3964acd0d mm: mempolicy: fi... |
797 798 799 800 |
if (mpol_equal(vma_policy(vma), new_pol)) continue; /* vma_merge() joined vma && vma->next, case 8 */ goto replace; |
9d8cebd4b mm: fix mbind vma... |
801 802 803 804 805 806 807 808 809 810 811 |
} 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... |
812 |
replace: |
869833f2c mempolicy: remove... |
813 |
err = vma_replace_policy(vma, new_pol); |
8d34694c1 revert "mm: mempo... |
814 815 |
if (err) goto out; |
1da177e4c Linux-2.6.12-rc2 |
816 |
} |
9d8cebd4b mm: fix mbind vma... |
817 818 |
out: |
1da177e4c Linux-2.6.12-rc2 |
819 820 |
return err; } |
1da177e4c Linux-2.6.12-rc2 |
821 |
/* Set the process memory policy */ |
028fec414 mempolicy: suppor... |
822 823 |
static long do_set_mempolicy(unsigned short mode, unsigned short flags, nodemask_t *nodes) |
1da177e4c Linux-2.6.12-rc2 |
824 |
{ |
58568d2a8 cpuset,mm: update... |
825 |
struct mempolicy *new, *old; |
4bfc44958 mm: make set_memp... |
826 |
NODEMASK_SCRATCH(scratch); |
58568d2a8 cpuset,mm: update... |
827 |
int ret; |
1da177e4c Linux-2.6.12-rc2 |
828 |
|
4bfc44958 mm: make set_memp... |
829 830 |
if (!scratch) return -ENOMEM; |
f4e53d910 mempolicy: write ... |
831 |
|
4bfc44958 mm: make set_memp... |
832 833 834 835 836 |
new = mpol_new(mode, flags, nodes); if (IS_ERR(new)) { ret = PTR_ERR(new); goto out; } |
2c7c3a7d0 mempolicy: kill d... |
837 |
|
4bfc44958 mm: make set_memp... |
838 |
ret = mpol_set_nodemask(new, nodes, scratch); |
58568d2a8 cpuset,mm: update... |
839 |
if (ret) { |
58568d2a8 cpuset,mm: update... |
840 |
mpol_put(new); |
4bfc44958 mm: make set_memp... |
841 |
goto out; |
58568d2a8 cpuset,mm: update... |
842 |
} |
78b132e9b mm/mempolicy: rem... |
843 |
task_lock(current); |
58568d2a8 cpuset,mm: update... |
844 |
old = current->mempolicy; |
1da177e4c Linux-2.6.12-rc2 |
845 |
current->mempolicy = new; |
45816682b mm, mempolicy: st... |
846 847 |
if (new && new->mode == MPOL_INTERLEAVE) current->il_prev = MAX_NUMNODES-1; |
58568d2a8 cpuset,mm: update... |
848 |
task_unlock(current); |
58568d2a8 cpuset,mm: update... |
849 |
mpol_put(old); |
4bfc44958 mm: make set_memp... |
850 851 852 853 |
ret = 0; out: NODEMASK_SCRATCH_FREE(scratch); return ret; |
1da177e4c Linux-2.6.12-rc2 |
854 |
} |
bea904d54 mempolicy: use MP... |
855 856 |
/* * Return nodemask for policy for get_mempolicy() query |
58568d2a8 cpuset,mm: update... |
857 858 |
* * Called with task's alloc_lock held |
bea904d54 mempolicy: use MP... |
859 860 |
*/ static void get_policy_nodemask(struct mempolicy *p, nodemask_t *nodes) |
1da177e4c Linux-2.6.12-rc2 |
861 |
{ |
dfcd3c0dc [PATCH] Convert m... |
862 |
nodes_clear(*nodes); |
bea904d54 mempolicy: use MP... |
863 864 |
if (p == &default_policy) return; |
45c4745af mempolicy: rename... |
865 |
switch (p->mode) { |
19770b326 mm: filter based ... |
866 |
case MPOL_BIND: |
1da177e4c Linux-2.6.12-rc2 |
867 |
case MPOL_INTERLEAVE: |
dfcd3c0dc [PATCH] Convert m... |
868 |
*nodes = p->v.nodes; |
1da177e4c Linux-2.6.12-rc2 |
869 870 |
break; case MPOL_PREFERRED: |
fc36b8d3d mempolicy: use MP... |
871 |
if (!(p->flags & MPOL_F_LOCAL)) |
dfcd3c0dc [PATCH] Convert m... |
872 |
node_set(p->v.preferred_node, *nodes); |
53f2556b6 mempolicy: mPOL_P... |
873 |
/* else return empty node mask for local allocation */ |
1da177e4c Linux-2.6.12-rc2 |
874 875 876 877 878 |
break; default: BUG(); } } |
3b9aadf72 userfaultfd: allo... |
879 |
static int lookup_node(struct mm_struct *mm, unsigned long addr) |
1da177e4c Linux-2.6.12-rc2 |
880 |
{ |
ba841078c mm/mempolicy: All... |
881 |
struct page *p = NULL; |
1da177e4c Linux-2.6.12-rc2 |
882 |
int err; |
3b9aadf72 userfaultfd: allo... |
883 884 |
int locked = 1; err = get_user_pages_locked(addr & PAGE_MASK, 1, 0, &p, &locked); |
2d3a36a47 mm, mempolicy: fi... |
885 |
if (err > 0) { |
1da177e4c Linux-2.6.12-rc2 |
886 887 888 |
err = page_to_nid(p); put_page(p); } |
3b9aadf72 userfaultfd: allo... |
889 |
if (locked) |
d8ed45c5d mmap locking API:... |
890 |
mmap_read_unlock(mm); |
1da177e4c Linux-2.6.12-rc2 |
891 892 |
return err; } |
1da177e4c Linux-2.6.12-rc2 |
893 |
/* Retrieve NUMA policy */ |
dbcb0f19c mm/mempolicy.c: c... |
894 895 |
static long do_get_mempolicy(int *policy, nodemask_t *nmask, unsigned long addr, unsigned long flags) |
1da177e4c Linux-2.6.12-rc2 |
896 |
{ |
8bccd85ff [PATCH] Implement... |
897 |
int err; |
1da177e4c Linux-2.6.12-rc2 |
898 899 |
struct mm_struct *mm = current->mm; struct vm_area_struct *vma = NULL; |
3b9aadf72 userfaultfd: allo... |
900 |
struct mempolicy *pol = current->mempolicy, *pol_refcount = NULL; |
1da177e4c Linux-2.6.12-rc2 |
901 |
|
754af6f5a Mem Policy: add M... |
902 903 |
if (flags & ~(unsigned long)(MPOL_F_NODE|MPOL_F_ADDR|MPOL_F_MEMS_ALLOWED)) |
1da177e4c Linux-2.6.12-rc2 |
904 |
return -EINVAL; |
754af6f5a Mem Policy: add M... |
905 906 907 908 909 |
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... |
910 |
task_lock(current); |
754af6f5a Mem Policy: add M... |
911 |
*nmask = cpuset_current_mems_allowed; |
58568d2a8 cpuset,mm: update... |
912 |
task_unlock(current); |
754af6f5a Mem Policy: add M... |
913 914 |
return 0; } |
1da177e4c Linux-2.6.12-rc2 |
915 |
if (flags & MPOL_F_ADDR) { |
bea904d54 mempolicy: use MP... |
916 917 918 919 920 |
/* * 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:... |
921 |
mmap_read_lock(mm); |
1da177e4c Linux-2.6.12-rc2 |
922 923 |
vma = find_vma_intersection(mm, addr, addr+1); if (!vma) { |
d8ed45c5d mmap locking API:... |
924 |
mmap_read_unlock(mm); |
1da177e4c Linux-2.6.12-rc2 |
925 926 927 928 929 930 931 932 933 934 |
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... |
935 |
pol = &default_policy; /* indicates default behavior */ |
1da177e4c Linux-2.6.12-rc2 |
936 937 938 |
if (flags & MPOL_F_NODE) { if (flags & MPOL_F_ADDR) { |
3b9aadf72 userfaultfd: allo... |
939 940 |
/* * Take a refcount on the mpol, lookup_node() |
c1e8d7c6a mmap locking API:... |
941 |
* wil drop the mmap_lock, so after calling |
3b9aadf72 userfaultfd: allo... |
942 943 944 945 946 947 948 |
* 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 |
949 950 |
if (err < 0) goto out; |
8bccd85ff [PATCH] Implement... |
951 |
*policy = err; |
1da177e4c Linux-2.6.12-rc2 |
952 |
} else if (pol == current->mempolicy && |
45c4745af mempolicy: rename... |
953 |
pol->mode == MPOL_INTERLEAVE) { |
45816682b mm, mempolicy: st... |
954 |
*policy = next_node_in(current->il_prev, pol->v.nodes); |
1da177e4c Linux-2.6.12-rc2 |
955 956 957 958 |
} else { err = -EINVAL; goto out; } |
bea904d54 mempolicy: use MP... |
959 960 961 |
} else { *policy = pol == &default_policy ? MPOL_DEFAULT : pol->mode; |
d79df630f mempolicy: mask o... |
962 963 964 965 966 |
/* * Internal mempolicy flags must be masked off before exposing * the policy to userspace. */ *policy |= (pol->flags & MPOL_MODE_FLAGS); |
bea904d54 mempolicy: use MP... |
967 |
} |
1da177e4c Linux-2.6.12-rc2 |
968 |
|
1da177e4c Linux-2.6.12-rc2 |
969 |
err = 0; |
58568d2a8 cpuset,mm: update... |
970 |
if (nmask) { |
c6b6ef8bb mempolicy: fix ge... |
971 972 973 974 975 976 977 |
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... |
978 |
} |
1da177e4c Linux-2.6.12-rc2 |
979 980 |
out: |
52cd3b074 mempolicy: rework... |
981 |
mpol_cond_put(pol); |
1da177e4c Linux-2.6.12-rc2 |
982 |
if (vma) |
d8ed45c5d mmap locking API:... |
983 |
mmap_read_unlock(mm); |
3b9aadf72 userfaultfd: allo... |
984 985 |
if (pol_refcount) mpol_put(pol_refcount); |
1da177e4c Linux-2.6.12-rc2 |
986 987 |
return err; } |
b20a35035 [PATCH] page migr... |
988 |
#ifdef CONFIG_MIGRATION |
8bccd85ff [PATCH] Implement... |
989 |
/* |
c86337984 mm: mempolicy: mb... |
990 |
* page migration, thp tail pages can be passed. |
6ce3c4c0f [PATCH] Move page... |
991 |
*/ |
a53190a4a mm: mempolicy: ha... |
992 |
static int migrate_page_add(struct page *page, struct list_head *pagelist, |
fc3012896 [PATCH] Simplify ... |
993 |
unsigned long flags) |
6ce3c4c0f [PATCH] Move page... |
994 |
{ |
c86337984 mm: mempolicy: mb... |
995 |
struct page *head = compound_head(page); |
6ce3c4c0f [PATCH] Move page... |
996 |
/* |
fc3012896 [PATCH] Simplify ... |
997 |
* Avoid migrating a page that is shared with others. |
6ce3c4c0f [PATCH] Move page... |
998 |
*/ |
c86337984 mm: mempolicy: mb... |
999 1000 1001 1002 |
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 ... |
1003 |
NR_ISOLATED_ANON + page_is_file_lru(head), |
6c357848b mm: replace hpage... |
1004 |
thp_nr_pages(head)); |
a53190a4a mm: mempolicy: ha... |
1005 1006 1007 1008 1009 1010 1011 1012 1013 |
} 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... |
1014 1015 |
} } |
a53190a4a mm: mempolicy: ha... |
1016 1017 |
return 0; |
7e2ab150d [PATCH] Direct Mi... |
1018 |
} |
6ce3c4c0f [PATCH] Move page... |
1019 |
|
7e2ab150d [PATCH] Direct Mi... |
1020 1021 1022 1023 |
/* * Migrate pages from one node to a target node. * Returns error or the number of pages not migrated. */ |
dbcb0f19c mm/mempolicy.c: c... |
1024 1025 |
static int migrate_to_node(struct mm_struct *mm, int source, int dest, int flags) |
7e2ab150d [PATCH] Direct Mi... |
1026 1027 1028 1029 |
{ nodemask_t nmask; LIST_HEAD(pagelist); int err = 0; |
a09763116 mm/mempolicy: use... |
1030 1031 1032 1033 |
struct migration_target_control mtc = { .nid = dest, .gfp_mask = GFP_HIGHUSER_MOVABLE | __GFP_THISNODE, }; |
7e2ab150d [PATCH] Direct Mi... |
1034 1035 1036 |
nodes_clear(nmask); node_set(source, nmask); |
6ce3c4c0f [PATCH] Move page... |
1037 |
|
082708072 mm: revert 0def08... |
1038 1039 1040 1041 1042 1043 |
/* * 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... |
1044 |
queue_pages_range(mm, mm->mmap->vm_start, mm->task_size, &nmask, |
7e2ab150d [PATCH] Direct Mi... |
1045 |
flags | MPOL_MF_DISCONTIG_OK, &pagelist); |
cf608ac19 mm: compaction: f... |
1046 |
if (!list_empty(&pagelist)) { |
a09763116 mm/mempolicy: use... |
1047 1048 |
err = migrate_pages(&pagelist, alloc_migration_target, NULL, (unsigned long)&mtc, MIGRATE_SYNC, MR_SYSCALL); |
cf608ac19 mm: compaction: f... |
1049 |
if (err) |
e2d8cf405 migrate: add huge... |
1050 |
putback_movable_pages(&pagelist); |
cf608ac19 mm: compaction: f... |
1051 |
} |
95a402c38 [PATCH] page migr... |
1052 |
|
7e2ab150d [PATCH] Direct Mi... |
1053 |
return err; |
6ce3c4c0f [PATCH] Move page... |
1054 1055 1056 |
} /* |
7e2ab150d [PATCH] Direct Mi... |
1057 1058 |
* Move pages between the two nodesets so as to preserve the physical * layout as much as possible. |
39743889a [PATCH] Swap Migr... |
1059 1060 1061 |
* * Returns the number of page that could not be moved. */ |
0ce72d4f7 mm: do_migrate_pa... |
1062 1063 |
int do_migrate_pages(struct mm_struct *mm, const nodemask_t *from, const nodemask_t *to, int flags) |
39743889a [PATCH] Swap Migr... |
1064 |
{ |
7e2ab150d [PATCH] Direct Mi... |
1065 |
int busy = 0; |
0aedadf91 mm: move migrate_... |
1066 |
int err; |
7e2ab150d [PATCH] Direct Mi... |
1067 |
nodemask_t tmp; |
39743889a [PATCH] Swap Migr... |
1068 |
|
0aedadf91 mm: move migrate_... |
1069 1070 1071 |
err = migrate_prep(); if (err) return err; |
d8ed45c5d mmap locking API:... |
1072 |
mmap_read_lock(mm); |
39743889a [PATCH] Swap Migr... |
1073 |
|
da0aa1389 mm/mempolicy.c: f... |
1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 |
/* * 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... |
1099 |
* Otherwise when we finish scanning from_tmp, we at least have the |
da0aa1389 mm/mempolicy.c: f... |
1100 1101 1102 1103 |
* 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: ... |
1104 |
|
0ce72d4f7 mm: do_migrate_pa... |
1105 |
tmp = *from; |
7e2ab150d [PATCH] Direct Mi... |
1106 1107 |
while (!nodes_empty(tmp)) { int s,d; |
b76ac7e73 mm/mempolicy: use... |
1108 |
int source = NUMA_NO_NODE; |
7e2ab150d [PATCH] Direct Mi... |
1109 1110 1111 |
int dest = 0; for_each_node_mask(s, tmp) { |
4a5b18cc1 mm: do_migrate_pa... |
1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 |
/* * 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... |
1127 1128 |
if ((nodes_weight(*from) != nodes_weight(*to)) && (node_isset(s, *to))) |
4a5b18cc1 mm: do_migrate_pa... |
1129 |
continue; |
0ce72d4f7 mm: do_migrate_pa... |
1130 |
d = node_remap(s, *from, *to); |
7e2ab150d [PATCH] Direct Mi... |
1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 |
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... |
1141 |
if (source == NUMA_NO_NODE) |
7e2ab150d [PATCH] Direct Mi... |
1142 1143 1144 1145 1146 1147 1148 1149 |
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... |
1150 |
} |
d8ed45c5d mmap locking API:... |
1151 |
mmap_read_unlock(mm); |
7e2ab150d [PATCH] Direct Mi... |
1152 1153 1154 |
if (err < 0) return err; return busy; |
b20a35035 [PATCH] page migr... |
1155 1156 |
} |
3ad33b243 Migration: find c... |
1157 1158 |
/* * Allocate a new page for page migration based on vma policy. |
d05f0cdcb mm: fix crashes f... |
1159 |
* Start by assuming the page is mapped by the same vma as contains @start. |
3ad33b243 Migration: find c... |
1160 1161 1162 1163 |
* 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... |
1164 |
static struct page *new_page(struct page *page, unsigned long start) |
95a402c38 [PATCH] page migr... |
1165 |
{ |
d05f0cdcb mm: fix crashes f... |
1166 |
struct vm_area_struct *vma; |
3f649ab72 treewide: Remove ... |
1167 |
unsigned long address; |
95a402c38 [PATCH] page migr... |
1168 |
|
d05f0cdcb mm: fix crashes f... |
1169 |
vma = find_vma(current->mm, start); |
3ad33b243 Migration: find c... |
1170 1171 1172 1173 1174 1175 |
while (vma) { address = page_address_in_vma(page, vma); if (address != -EFAULT) break; vma = vma->vm_next; } |
11c731e81 mm/mempolicy: fix... |
1176 1177 |
if (PageHuge(page)) { |
389c8178d hugetlb, mbind: f... |
1178 1179 |
return alloc_huge_page_vma(page_hstate(compound_head(page)), vma, address); |
94723aafb mm: unclutter THP... |
1180 |
} else if (PageTransHuge(page)) { |
c86337984 mm: mempolicy: mb... |
1181 |
struct page *thp; |
19deb7695 Revert "Revert "R... |
1182 1183 |
thp = alloc_hugepage_vma(GFP_TRANSHUGE, vma, address, HPAGE_PMD_ORDER); |
c86337984 mm: mempolicy: mb... |
1184 1185 1186 1187 |
if (!thp) return NULL; prep_transhuge_page(thp); return thp; |
11c731e81 mm/mempolicy: fix... |
1188 |
} |
0bf598d86 mbind: add BUG_ON... |
1189 |
/* |
11c731e81 mm/mempolicy: fix... |
1190 |
* if !vma, alloc_page_vma() will use task or system default policy |
0bf598d86 mbind: add BUG_ON... |
1191 |
*/ |
0f5568562 mm, migration: do... |
1192 1193 |
return alloc_page_vma(GFP_HIGHUSER_MOVABLE | __GFP_RETRY_MAYFAIL, vma, address); |
95a402c38 [PATCH] page migr... |
1194 |
} |
b20a35035 [PATCH] page migr... |
1195 |
#else |
a53190a4a mm: mempolicy: ha... |
1196 |
static int migrate_page_add(struct page *page, struct list_head *pagelist, |
b20a35035 [PATCH] page migr... |
1197 1198 |
unsigned long flags) { |
a53190a4a mm: mempolicy: ha... |
1199 |
return -EIO; |
39743889a [PATCH] Swap Migr... |
1200 |
} |
0ce72d4f7 mm: do_migrate_pa... |
1201 1202 |
int do_migrate_pages(struct mm_struct *mm, const nodemask_t *from, const nodemask_t *to, int flags) |
b20a35035 [PATCH] page migr... |
1203 1204 1205 |
{ return -ENOSYS; } |
95a402c38 [PATCH] page migr... |
1206 |
|
666feb21a mm, migrate: remo... |
1207 |
static struct page *new_page(struct page *page, unsigned long start) |
95a402c38 [PATCH] page migr... |
1208 1209 1210 |
{ return NULL; } |
b20a35035 [PATCH] page migr... |
1211 |
#endif |
dbcb0f19c mm/mempolicy.c: c... |
1212 |
static long do_mbind(unsigned long start, unsigned long len, |
028fec414 mempolicy: suppor... |
1213 1214 |
unsigned short mode, unsigned short mode_flags, nodemask_t *nmask, unsigned long flags) |
6ce3c4c0f [PATCH] Move page... |
1215 |
{ |
6ce3c4c0f [PATCH] Move page... |
1216 1217 1218 1219 |
struct mm_struct *mm = current->mm; struct mempolicy *new; unsigned long end; int err; |
d88354451 mm: mempolicy: ma... |
1220 |
int ret; |
6ce3c4c0f [PATCH] Move page... |
1221 |
LIST_HEAD(pagelist); |
b24f53a0b mm: mempolicy: Ad... |
1222 |
if (flags & ~(unsigned long)MPOL_MF_VALID) |
6ce3c4c0f [PATCH] Move page... |
1223 |
return -EINVAL; |
74c002410 [PATCH] Consisten... |
1224 |
if ((flags & MPOL_MF_MOVE_ALL) && !capable(CAP_SYS_NICE)) |
6ce3c4c0f [PATCH] Move page... |
1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 |
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... |
1240 |
new = mpol_new(mode, mode_flags, nmask); |
6ce3c4c0f [PATCH] Move page... |
1241 1242 |
if (IS_ERR(new)) return PTR_ERR(new); |
b24f53a0b mm: mempolicy: Ad... |
1243 1244 |
if (flags & MPOL_MF_LAZY) new->flags |= MPOL_F_MOF; |
6ce3c4c0f [PATCH] Move page... |
1245 1246 1247 1248 1249 1250 |
/* * 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... |
1251 1252 1253 |
pr_debug("mbind %lx-%lx mode:%d flags:%d nodes:%lx ", start, start + len, mode, mode_flags, |
00ef2d2f8 mm: use NUMA_NO_NODE |
1254 |
nmask ? nodes_addr(*nmask)[0] : NUMA_NO_NODE); |
6ce3c4c0f [PATCH] Move page... |
1255 |
|
0aedadf91 mm: move migrate_... |
1256 1257 1258 1259 |
if (flags & (MPOL_MF_MOVE | MPOL_MF_MOVE_ALL)) { err = migrate_prep(); if (err) |
b05ca7385 do_mbind(): fix m... |
1260 |
goto mpol_out; |
0aedadf91 mm: move migrate_... |
1261 |
} |
4bfc44958 mm: make set_memp... |
1262 1263 1264 |
{ NODEMASK_SCRATCH(scratch); if (scratch) { |
d8ed45c5d mmap locking API:... |
1265 |
mmap_write_lock(mm); |
4bfc44958 mm: make set_memp... |
1266 |
err = mpol_set_nodemask(new, nmask, scratch); |
4bfc44958 mm: make set_memp... |
1267 |
if (err) |
d8ed45c5d mmap locking API:... |
1268 |
mmap_write_unlock(mm); |
4bfc44958 mm: make set_memp... |
1269 1270 1271 1272 |
} else err = -ENOMEM; NODEMASK_SCRATCH_FREE(scratch); } |
b05ca7385 do_mbind(): fix m... |
1273 1274 |
if (err) goto mpol_out; |
d88354451 mm: mempolicy: ma... |
1275 |
ret = queue_pages_range(mm, start, end, nmask, |
6ce3c4c0f [PATCH] Move page... |
1276 |
flags | MPOL_MF_INVERT, &pagelist); |
d88354451 mm: mempolicy: ma... |
1277 1278 |
if (ret < 0) { |
a85dfc305 mm: mempolicy: fi... |
1279 |
err = ret; |
d88354451 mm: mempolicy: ma... |
1280 1281 1282 1283 |
goto up_out; } err = mbind_range(mm, start, end, new); |
7e2ab150d [PATCH] Direct Mi... |
1284 |
|
b24f53a0b mm: mempolicy: Ad... |
1285 1286 |
if (!err) { int nr_failed = 0; |
cf608ac19 mm: compaction: f... |
1287 |
if (!list_empty(&pagelist)) { |
b24f53a0b mm: mempolicy: Ad... |
1288 |
WARN_ON_ONCE(flags & MPOL_MF_LAZY); |
d05f0cdcb mm: fix crashes f... |
1289 1290 |
nr_failed = migrate_pages(&pagelist, new_page, NULL, start, MIGRATE_SYNC, MR_MEMPOLICY_MBIND); |
cf608ac19 mm: compaction: f... |
1291 |
if (nr_failed) |
74060e4d7 mm: mbind: add hu... |
1292 |
putback_movable_pages(&pagelist); |
cf608ac19 mm: compaction: f... |
1293 |
} |
6ce3c4c0f [PATCH] Move page... |
1294 |
|
d88354451 mm: mempolicy: ma... |
1295 |
if ((ret > 0) || (nr_failed && (flags & MPOL_MF_STRICT))) |
6ce3c4c0f [PATCH] Move page... |
1296 |
err = -EIO; |
a85dfc305 mm: mempolicy: fi... |
1297 |
} else { |
d88354451 mm: mempolicy: ma... |
1298 |
up_out: |
a85dfc305 mm: mempolicy: fi... |
1299 1300 1301 |
if (!list_empty(&pagelist)) putback_movable_pages(&pagelist); } |
d8ed45c5d mmap locking API:... |
1302 |
mmap_write_unlock(mm); |
d88354451 mm: mempolicy: ma... |
1303 |
mpol_out: |
f0be3d32b mempolicy: rename... |
1304 |
mpol_put(new); |
6ce3c4c0f [PATCH] Move page... |
1305 1306 |
return err; } |
39743889a [PATCH] Swap Migr... |
1307 |
/* |
8bccd85ff [PATCH] Implement... |
1308 1309 1310 1311 |
* User space interface with variable sized bitmaps for nodelists. */ /* Copy a node mask from user space. */ |
39743889a [PATCH] Swap Migr... |
1312 |
static int get_nodes(nodemask_t *nodes, const unsigned long __user *nmask, |
8bccd85ff [PATCH] Implement... |
1313 1314 1315 |
unsigned long maxnode) { unsigned long k; |
56521e7a0 mm/mempolicy: fix... |
1316 |
unsigned long t; |
8bccd85ff [PATCH] Implement... |
1317 1318 1319 1320 1321 1322 1323 |
unsigned long nlongs; unsigned long endmask; --maxnode; nodes_clear(*nodes); if (maxnode == 0 || !nmask) return 0; |
a9c930bac [PATCH] Fix units... |
1324 |
if (maxnode > PAGE_SIZE*BITS_PER_BYTE) |
636f13c17 [PATCH] sys_mbind... |
1325 |
return -EINVAL; |
8bccd85ff [PATCH] Implement... |
1326 1327 1328 1329 1330 1331 |
nlongs = BITS_TO_LONGS(maxnode); if ((maxnode % BITS_PER_LONG) == 0) endmask = ~0UL; else endmask = (1UL << (maxnode % BITS_PER_LONG)) - 1; |
56521e7a0 mm/mempolicy: fix... |
1332 1333 1334 1335 1336 1337 1338 1339 1340 |
/* * When the user specified more nodes than supported just check * if the non supported part is all zero. * * If maxnode have more longs than MAX_NUMNODES, check * the bits in that area first. And then go through to * check the rest bits which equal or bigger than MAX_NUMNODES. * Otherwise, just check bits [MAX_NUMNODES, maxnode). */ |
8bccd85ff [PATCH] Implement... |
1341 |
if (nlongs > BITS_TO_LONGS(MAX_NUMNODES)) { |
8bccd85ff [PATCH] Implement... |
1342 |
for (k = BITS_TO_LONGS(MAX_NUMNODES); k < nlongs; k++) { |
8bccd85ff [PATCH] Implement... |
1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 |
if (get_user(t, nmask + k)) return -EFAULT; if (k == nlongs - 1) { if (t & endmask) return -EINVAL; } else if (t) return -EINVAL; } nlongs = BITS_TO_LONGS(MAX_NUMNODES); endmask = ~0UL; } |
56521e7a0 mm/mempolicy: fix... |
1354 1355 1356 1357 1358 1359 1360 1361 1362 |
if (maxnode > MAX_NUMNODES && MAX_NUMNODES % BITS_PER_LONG != 0) { unsigned long valid_mask = endmask; valid_mask &= ~((1UL << (MAX_NUMNODES % BITS_PER_LONG)) - 1); if (get_user(t, nmask + nlongs - 1)) return -EFAULT; if (t & valid_mask) return -EINVAL; } |
8bccd85ff [PATCH] Implement... |
1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 |
if (copy_from_user(nodes_addr(*nodes), nmask, nlongs*sizeof(unsigned long))) return -EFAULT; nodes_addr(*nodes)[nlongs-1] &= endmask; return 0; } /* 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_... |
1374 |
unsigned int nbytes = BITS_TO_LONGS(nr_node_ids) * sizeof(long); |
8bccd85ff [PATCH] Implement... |
1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 |
if (copy > nbytes) { if (copy > PAGE_SIZE) return -EINVAL; if (clear_user((char __user *)mask + nbytes, copy - nbytes)) return -EFAULT; copy = nbytes; } return copy_to_user(mask, nodes_addr(*nodes), copy) ? -EFAULT : 0; } |
e7dc9ad6e mm: add kernel_mb... |
1385 1386 1387 |
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... |
1388 1389 1390 |
{ nodemask_t nodes; int err; |
028fec414 mempolicy: suppor... |
1391 |
unsigned short mode_flags; |
8bccd85ff [PATCH] Implement... |
1392 |
|
057d33891 mm: untag user po... |
1393 |
start = untagged_addr(start); |
028fec414 mempolicy: suppor... |
1394 1395 |
mode_flags = mode & MPOL_MODE_FLAGS; mode &= ~MPOL_MODE_FLAGS; |
a3b51e014 mempolicy: conver... |
1396 1397 |
if (mode >= MPOL_MAX) return -EINVAL; |
4c50bc011 mempolicy: add MP... |
1398 1399 1400 |
if ((mode_flags & MPOL_F_STATIC_NODES) && (mode_flags & MPOL_F_RELATIVE_NODES)) return -EINVAL; |
8bccd85ff [PATCH] Implement... |
1401 1402 1403 |
err = get_nodes(&nodes, nmask, maxnode); if (err) return err; |
028fec414 mempolicy: suppor... |
1404 |
return do_mbind(start, len, mode, mode_flags, &nodes, flags); |
8bccd85ff [PATCH] Implement... |
1405 |
} |
e7dc9ad6e mm: add kernel_mb... |
1406 1407 1408 1409 1410 1411 |
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... |
1412 |
/* Set the process memory policy */ |
af03c4acb mm: add kernel_[s... |
1413 1414 |
static long kernel_set_mempolicy(int mode, const unsigned long __user *nmask, unsigned long maxnode) |
8bccd85ff [PATCH] Implement... |
1415 1416 1417 |
{ int err; nodemask_t nodes; |
028fec414 mempolicy: suppor... |
1418 |
unsigned short flags; |
8bccd85ff [PATCH] Implement... |
1419 |
|
028fec414 mempolicy: suppor... |
1420 1421 1422 |
flags = mode & MPOL_MODE_FLAGS; mode &= ~MPOL_MODE_FLAGS; if ((unsigned int)mode >= MPOL_MAX) |
8bccd85ff [PATCH] Implement... |
1423 |
return -EINVAL; |
4c50bc011 mempolicy: add MP... |
1424 1425 |
if ((flags & MPOL_F_STATIC_NODES) && (flags & MPOL_F_RELATIVE_NODES)) return -EINVAL; |
8bccd85ff [PATCH] Implement... |
1426 1427 1428 |
err = get_nodes(&nodes, nmask, maxnode); if (err) return err; |
028fec414 mempolicy: suppor... |
1429 |
return do_set_mempolicy(mode, flags, &nodes); |
8bccd85ff [PATCH] Implement... |
1430 |
} |
af03c4acb mm: add kernel_[s... |
1431 1432 1433 1434 1435 |
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... |
1436 1437 1438 |
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... |
1439 |
{ |
596d7cfa2 mempolicy: reduce... |
1440 |
struct mm_struct *mm = NULL; |
39743889a [PATCH] Swap Migr... |
1441 |
struct task_struct *task; |
39743889a [PATCH] Swap Migr... |
1442 1443 |
nodemask_t task_nodes; int err; |
596d7cfa2 mempolicy: reduce... |
1444 1445 1446 1447 1448 1449 |
nodemask_t *old; nodemask_t *new; NODEMASK_SCRATCH(scratch); if (!scratch) return -ENOMEM; |
39743889a [PATCH] Swap Migr... |
1450 |
|
596d7cfa2 mempolicy: reduce... |
1451 1452 1453 1454 |
old = &scratch->mask1; new = &scratch->mask2; err = get_nodes(old, old_nodes, maxnode); |
39743889a [PATCH] Swap Migr... |
1455 |
if (err) |
596d7cfa2 mempolicy: reduce... |
1456 |
goto out; |
39743889a [PATCH] Swap Migr... |
1457 |
|
596d7cfa2 mempolicy: reduce... |
1458 |
err = get_nodes(new, new_nodes, maxnode); |
39743889a [PATCH] Swap Migr... |
1459 |
if (err) |
596d7cfa2 mempolicy: reduce... |
1460 |
goto out; |
39743889a [PATCH] Swap Migr... |
1461 1462 |
/* Find the mm_struct */ |
55cfaa3cb mm/mempolicy.c: a... |
1463 |
rcu_read_lock(); |
228ebcbe6 Uninline find_tas... |
1464 |
task = pid ? find_task_by_vpid(pid) : current; |
39743889a [PATCH] Swap Migr... |
1465 |
if (!task) { |
55cfaa3cb mm/mempolicy.c: a... |
1466 |
rcu_read_unlock(); |
596d7cfa2 mempolicy: reduce... |
1467 1468 |
err = -ESRCH; goto out; |
39743889a [PATCH] Swap Migr... |
1469 |
} |
3268c63ed mm: fix move/migr... |
1470 |
get_task_struct(task); |
39743889a [PATCH] Swap Migr... |
1471 |
|
596d7cfa2 mempolicy: reduce... |
1472 |
err = -EINVAL; |
39743889a [PATCH] Swap Migr... |
1473 1474 |
/* |
313674661 Unify migrate_pag... |
1475 1476 |
* Check if this process has the right to modify the specified process. * Use the regular "ptrace_may_access()" checks. |
39743889a [PATCH] Swap Migr... |
1477 |
*/ |
313674661 Unify migrate_pag... |
1478 |
if (!ptrace_may_access(task, PTRACE_MODE_READ_REALCREDS)) { |
c69e8d9c0 CRED: Use RCU to ... |
1479 |
rcu_read_unlock(); |
39743889a [PATCH] Swap Migr... |
1480 |
err = -EPERM; |
3268c63ed mm: fix move/migr... |
1481 |
goto out_put; |
39743889a [PATCH] Swap Migr... |
1482 |
} |
c69e8d9c0 CRED: Use RCU to ... |
1483 |
rcu_read_unlock(); |
39743889a [PATCH] Swap Migr... |
1484 1485 1486 |
task_nodes = cpuset_mems_allowed(task); /* Is the user allowed to access the target nodes? */ |
596d7cfa2 mempolicy: reduce... |
1487 |
if (!nodes_subset(*new, task_nodes) && !capable(CAP_SYS_NICE)) { |
39743889a [PATCH] Swap Migr... |
1488 |
err = -EPERM; |
3268c63ed mm: fix move/migr... |
1489 |
goto out_put; |
39743889a [PATCH] Swap Migr... |
1490 |
} |
0486a38bc mm/mempolicy: add... |
1491 1492 1493 1494 |
task_nodes = cpuset_mems_allowed(current); nodes_and(*new, *new, task_nodes); if (nodes_empty(*new)) goto out_put; |
86c3a7645 [PATCH] SELinux: ... |
1495 1496 |
err = security_task_movememory(task); if (err) |
3268c63ed mm: fix move/migr... |
1497 |
goto out_put; |
86c3a7645 [PATCH] SELinux: ... |
1498 |
|
3268c63ed mm: fix move/migr... |
1499 1500 |
mm = get_task_mm(task); put_task_struct(task); |
f2a9ef880 mm: fix NULL ptr ... |
1501 1502 |
if (!mm) { |
3268c63ed mm: fix move/migr... |
1503 |
err = -EINVAL; |
f2a9ef880 mm: fix NULL ptr ... |
1504 1505 1506 1507 1508 |
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... |
1509 1510 1511 |
mmput(mm); out: |
596d7cfa2 mempolicy: reduce... |
1512 |
NODEMASK_SCRATCH_FREE(scratch); |
39743889a [PATCH] Swap Migr... |
1513 |
return err; |
3268c63ed mm: fix move/migr... |
1514 1515 1516 1517 |
out_put: put_task_struct(task); goto out; |
39743889a [PATCH] Swap Migr... |
1518 |
} |
b6e9b0bab mm: add kernel_mi... |
1519 1520 1521 1522 1523 1524 |
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... |
1525 |
|
8bccd85ff [PATCH] Implement... |
1526 |
/* Retrieve NUMA policy */ |
af03c4acb mm: add kernel_[s... |
1527 1528 1529 1530 1531 |
static int kernel_get_mempolicy(int __user *policy, unsigned long __user *nmask, unsigned long maxnode, unsigned long addr, unsigned long flags) |
8bccd85ff [PATCH] Implement... |
1532 |
{ |
dbcb0f19c mm/mempolicy.c: c... |
1533 |
int err; |
3f649ab72 treewide: Remove ... |
1534 |
int pval; |
8bccd85ff [PATCH] Implement... |
1535 |
nodemask_t nodes; |
050c17f23 numa: change get_... |
1536 |
if (nmask != NULL && maxnode < nr_node_ids) |
8bccd85ff [PATCH] Implement... |
1537 |
return -EINVAL; |
4605f057a mm/mempolicy.c: c... |
1538 |
addr = untagged_addr(addr); |
8bccd85ff [PATCH] Implement... |
1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 |
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... |
1552 1553 1554 1555 1556 1557 |
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); } |
1da177e4c Linux-2.6.12-rc2 |
1558 |
#ifdef CONFIG_COMPAT |
c93e0f6c8 mm/compat: conver... |
1559 1560 1561 1562 |
COMPAT_SYSCALL_DEFINE5(get_mempolicy, int __user *, policy, compat_ulong_t __user *, nmask, compat_ulong_t, maxnode, compat_ulong_t, addr, compat_ulong_t, flags) |
1da177e4c Linux-2.6.12-rc2 |
1563 1564 1565 1566 1567 |
{ long err; unsigned long __user *nm = NULL; unsigned long nr_bits, alloc_size; DECLARE_BITMAP(bm, MAX_NUMNODES); |
050c17f23 numa: change get_... |
1568 |
nr_bits = min_t(unsigned long, maxnode-1, nr_node_ids); |
1da177e4c Linux-2.6.12-rc2 |
1569 1570 1571 1572 |
alloc_size = ALIGN(nr_bits, BITS_PER_LONG) / 8; if (nmask) nm = compat_alloc_user_space(alloc_size); |
af03c4acb mm: add kernel_[s... |
1573 |
err = kernel_get_mempolicy(policy, nm, nr_bits+1, addr, flags); |
1da177e4c Linux-2.6.12-rc2 |
1574 1575 |
if (!err && nmask) { |
2bbff6c76 mm/mempolicy.c: m... |
1576 1577 1578 |
unsigned long copy_size; copy_size = min_t(unsigned long, sizeof(bm), alloc_size); err = copy_from_user(bm, nm, copy_size); |
1da177e4c Linux-2.6.12-rc2 |
1579 1580 1581 1582 1583 1584 1585 |
/* ensure entire bitmap is zeroed */ err |= clear_user(nmask, ALIGN(maxnode-1, 8) / 8); err |= compat_put_bitmap(nmask, bm, nr_bits); } return err; } |
c93e0f6c8 mm/compat: conver... |
1586 1587 |
COMPAT_SYSCALL_DEFINE3(set_mempolicy, int, mode, compat_ulong_t __user *, nmask, compat_ulong_t, maxnode) |
1da177e4c Linux-2.6.12-rc2 |
1588 |
{ |
1da177e4c Linux-2.6.12-rc2 |
1589 1590 1591 1592 1593 1594 1595 1596 |
unsigned long __user *nm = NULL; unsigned long nr_bits, alloc_size; DECLARE_BITMAP(bm, MAX_NUMNODES); nr_bits = min_t(unsigned long, maxnode-1, MAX_NUMNODES); alloc_size = ALIGN(nr_bits, BITS_PER_LONG) / 8; if (nmask) { |
cf01fb998 mm/mempolicy.c: f... |
1597 1598 |
if (compat_get_bitmap(bm, nmask, nr_bits)) return -EFAULT; |
1da177e4c Linux-2.6.12-rc2 |
1599 |
nm = compat_alloc_user_space(alloc_size); |
cf01fb998 mm/mempolicy.c: f... |
1600 1601 |
if (copy_to_user(nm, bm, alloc_size)) return -EFAULT; |
1da177e4c Linux-2.6.12-rc2 |
1602 |
} |
af03c4acb mm: add kernel_[s... |
1603 |
return kernel_set_mempolicy(mode, nm, nr_bits+1); |
1da177e4c Linux-2.6.12-rc2 |
1604 |
} |
c93e0f6c8 mm/compat: conver... |
1605 1606 1607 |
COMPAT_SYSCALL_DEFINE6(mbind, compat_ulong_t, start, compat_ulong_t, len, compat_ulong_t, mode, compat_ulong_t __user *, nmask, compat_ulong_t, maxnode, compat_ulong_t, flags) |
1da177e4c Linux-2.6.12-rc2 |
1608 |
{ |
1da177e4c Linux-2.6.12-rc2 |
1609 1610 |
unsigned long __user *nm = NULL; unsigned long nr_bits, alloc_size; |
dfcd3c0dc [PATCH] Convert m... |
1611 |
nodemask_t bm; |
1da177e4c Linux-2.6.12-rc2 |
1612 1613 1614 1615 1616 |
nr_bits = min_t(unsigned long, maxnode-1, MAX_NUMNODES); alloc_size = ALIGN(nr_bits, BITS_PER_LONG) / 8; if (nmask) { |
cf01fb998 mm/mempolicy.c: f... |
1617 1618 |
if (compat_get_bitmap(nodes_addr(bm), nmask, nr_bits)) return -EFAULT; |
1da177e4c Linux-2.6.12-rc2 |
1619 |
nm = compat_alloc_user_space(alloc_size); |
cf01fb998 mm/mempolicy.c: f... |
1620 1621 |
if (copy_to_user(nm, nodes_addr(bm), alloc_size)) return -EFAULT; |
1da177e4c Linux-2.6.12-rc2 |
1622 |
} |
e7dc9ad6e mm: add kernel_mb... |
1623 |
return kernel_mbind(start, len, mode, nm, nr_bits+1, flags); |
1da177e4c Linux-2.6.12-rc2 |
1624 |
} |
b6e9b0bab mm: add kernel_mi... |
1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 |
COMPAT_SYSCALL_DEFINE4(migrate_pages, compat_pid_t, pid, compat_ulong_t, maxnode, const compat_ulong_t __user *, old_nodes, const compat_ulong_t __user *, new_nodes) { unsigned long __user *old = NULL; unsigned long __user *new = NULL; nodemask_t tmp_mask; unsigned long nr_bits; unsigned long size; nr_bits = min_t(unsigned long, maxnode - 1, MAX_NUMNODES); size = ALIGN(nr_bits, BITS_PER_LONG) / 8; if (old_nodes) { if (compat_get_bitmap(nodes_addr(tmp_mask), old_nodes, nr_bits)) return -EFAULT; old = compat_alloc_user_space(new_nodes ? size * 2 : size); if (new_nodes) new = old + size / sizeof(unsigned long); if (copy_to_user(old, nodes_addr(tmp_mask), size)) return -EFAULT; } if (new_nodes) { if (compat_get_bitmap(nodes_addr(tmp_mask), new_nodes, nr_bits)) return -EFAULT; if (new == NULL) new = compat_alloc_user_space(size); if (copy_to_user(new, nodes_addr(tmp_mask), size)) return -EFAULT; } return kernel_migrate_pages(pid, nr_bits + 1, old, new); } #endif /* CONFIG_COMPAT */ |
1da177e4c Linux-2.6.12-rc2 |
1659 |
|
20ca87f22 mm/mempolicy: che... |
1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 |
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... |
1687 1688 |
struct mempolicy *__get_vma_policy(struct vm_area_struct *vma, unsigned long addr) |
1da177e4c Linux-2.6.12-rc2 |
1689 |
{ |
8d90274b3 mempolicy: saniti... |
1690 |
struct mempolicy *pol = NULL; |
1da177e4c Linux-2.6.12-rc2 |
1691 1692 |
if (vma) { |
480eccf9a Fix NUMA Memory P... |
1693 |
if (vma->vm_ops && vma->vm_ops->get_policy) { |
8d90274b3 mempolicy: saniti... |
1694 |
pol = vma->vm_ops->get_policy(vma, addr); |
00442ad04 mempolicy: fix a ... |
1695 |
} else if (vma->vm_policy) { |
1da177e4c Linux-2.6.12-rc2 |
1696 |
pol = vma->vm_policy; |
00442ad04 mempolicy: fix a ... |
1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 |
/* * 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 |
1707 |
} |
f15ca78e3 mempolicy: change... |
1708 |
|
74d2c3a05 mempolicy: introd... |
1709 1710 1711 1712 |
return pol; } /* |
dd6eecb91 mempolicy: unexpo... |
1713 |
* get_vma_policy(@vma, @addr) |
74d2c3a05 mempolicy: introd... |
1714 1715 1716 1717 |
* @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... |
1718 |
* Falls back to current->mempolicy or system default policy, as necessary. |
74d2c3a05 mempolicy: introd... |
1719 1720 1721 1722 1723 |
* 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... |
1724 |
static struct mempolicy *get_vma_policy(struct vm_area_struct *vma, |
dd6eecb91 mempolicy: unexpo... |
1725 |
unsigned long addr) |
74d2c3a05 mempolicy: introd... |
1726 1727 |
{ struct mempolicy *pol = __get_vma_policy(vma, addr); |
8d90274b3 mempolicy: saniti... |
1728 |
if (!pol) |
dd6eecb91 mempolicy: unexpo... |
1729 |
pol = get_task_policy(current); |
8d90274b3 mempolicy: saniti... |
1730 |
|
1da177e4c Linux-2.6.12-rc2 |
1731 1732 |
return pol; } |
6b6482bbf mempolicy: remove... |
1733 |
bool vma_policy_mof(struct vm_area_struct *vma) |
fc3147245 mm: numa: Limit N... |
1734 |
{ |
6b6482bbf mempolicy: remove... |
1735 |
struct mempolicy *pol; |
fc3147245 mm: numa: Limit N... |
1736 |
|
6b6482bbf mempolicy: remove... |
1737 1738 |
if (vma->vm_ops && vma->vm_ops->get_policy) { bool ret = false; |
fc3147245 mm: numa: Limit N... |
1739 |
|
6b6482bbf mempolicy: remove... |
1740 1741 1742 1743 |
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... |
1744 |
|
6b6482bbf mempolicy: remove... |
1745 |
return ret; |
fc3147245 mm: numa: Limit N... |
1746 |
} |
6b6482bbf mempolicy: remove... |
1747 |
pol = vma->vm_policy; |
8d90274b3 mempolicy: saniti... |
1748 |
if (!pol) |
6b6482bbf mempolicy: remove... |
1749 |
pol = get_task_policy(current); |
8d90274b3 mempolicy: saniti... |
1750 |
|
fc3147245 mm: numa: Limit N... |
1751 1752 |
return pol->flags & MPOL_F_MOF; } |
d3eb1570a mempolicy: fix is... |
1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 |
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); /* * if policy->v.nodes has movable memory only, * we apply policy when gfp_zone(gfp) = ZONE_MOVABLE only. * * policy->v.nodes is intersect with node_states[N_MEMORY]. * so if the following test faile, it implies * policy->v.nodes has movable memory only. */ if (!nodes_intersects(policy->v.nodes, node_states[N_HIGH_MEMORY])) dynamic_policy_zone = ZONE_MOVABLE; return zone >= dynamic_policy_zone; } |
52cd3b074 mempolicy: rework... |
1772 1773 1774 1775 |
/* * Return a nodemask representing a mempolicy for filtering nodes for * page allocation */ |
8ca39e687 mm/hugetlb: add m... |
1776 |
nodemask_t *policy_nodemask(gfp_t gfp, struct mempolicy *policy) |
19770b326 mm: filter based ... |
1777 1778 |
{ /* Lower zones don't get a nodemask applied for MPOL_BIND */ |
45c4745af mempolicy: rename... |
1779 |
if (unlikely(policy->mode == MPOL_BIND) && |
d3eb1570a mempolicy: fix is... |
1780 |
apply_policy_zone(policy, gfp_zone(gfp)) && |
19770b326 mm: filter based ... |
1781 1782 1783 1784 1785 |
cpuset_nodemask_valid_mems_allowed(&policy->v.nodes)) return &policy->v.nodes; return NULL; } |
04ec6264f mm, page_alloc: p... |
1786 |
/* Return the node id preferred by the given mempolicy, or the given id */ |
f8fd52535 mm: remove unused... |
1787 |
static int policy_node(gfp_t gfp, struct mempolicy *policy, int nd) |
1da177e4c Linux-2.6.12-rc2 |
1788 |
{ |
6d8409580 mm, mempolicy: cl... |
1789 1790 1791 |
if (policy->mode == MPOL_PREFERRED && !(policy->flags & MPOL_F_LOCAL)) nd = policy->v.preferred_node; else { |
19770b326 mm: filter based ... |
1792 |
/* |
6d8409580 mm, mempolicy: cl... |
1793 1794 1795 |
* __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 ... |
1796 |
*/ |
6d8409580 mm, mempolicy: cl... |
1797 |
WARN_ON_ONCE(policy->mode == MPOL_BIND && (gfp & __GFP_THISNODE)); |
1da177e4c Linux-2.6.12-rc2 |
1798 |
} |
6d8409580 mm, mempolicy: cl... |
1799 |
|
04ec6264f mm, page_alloc: p... |
1800 |
return nd; |
1da177e4c Linux-2.6.12-rc2 |
1801 1802 1803 1804 1805 |
} /* Do dynamic interleaving for a process */ static unsigned interleave_nodes(struct mempolicy *policy) { |
45816682b mm, mempolicy: st... |
1806 |
unsigned next; |
1da177e4c Linux-2.6.12-rc2 |
1807 |
struct task_struct *me = current; |
45816682b mm, mempolicy: st... |
1808 |
next = next_node_in(me->il_prev, policy->v.nodes); |
f5b087b52 mempolicy: add MP... |
1809 |
if (next < MAX_NUMNODES) |
45816682b mm, mempolicy: st... |
1810 1811 |
me->il_prev = next; return next; |
1da177e4c Linux-2.6.12-rc2 |
1812 |
} |
dc85da15d [PATCH] NUMA poli... |
1813 1814 1815 1816 |
/* * Depending on the memory policy provide a node from which to allocate the * next slab entry. */ |
2a389610a mm, mempolicy: re... |
1817 |
unsigned int mempolicy_slab_node(void) |
dc85da15d [PATCH] NUMA poli... |
1818 |
{ |
e7b691b08 slab/mempolicy: a... |
1819 |
struct mempolicy *policy; |
2a389610a mm, mempolicy: re... |
1820 |
int node = numa_mem_id(); |
e7b691b08 slab/mempolicy: a... |
1821 1822 |
if (in_interrupt()) |
2a389610a mm, mempolicy: re... |
1823 |
return node; |
e7b691b08 slab/mempolicy: a... |
1824 1825 |
policy = current->mempolicy; |
fc36b8d3d mempolicy: use MP... |
1826 |
if (!policy || policy->flags & MPOL_F_LOCAL) |
2a389610a mm, mempolicy: re... |
1827 |
return node; |
bea904d54 mempolicy: use MP... |
1828 1829 1830 |
switch (policy->mode) { case MPOL_PREFERRED: |
fc36b8d3d mempolicy: use MP... |
1831 1832 1833 1834 |
/* * handled MPOL_F_LOCAL above */ return policy->v.preferred_node; |
765c4507a [PATCH] GFP_THISN... |
1835 |
|
dc85da15d [PATCH] NUMA poli... |
1836 1837 |
case MPOL_INTERLEAVE: return interleave_nodes(policy); |
dd1a239f6 mm: have zonelist... |
1838 |
case MPOL_BIND: { |
c33d6c06f mm, page_alloc: a... |
1839 |
struct zoneref *z; |
dc85da15d [PATCH] NUMA poli... |
1840 1841 1842 1843 |
/* * Follow bind policy behavior and start allocation at the * first node. */ |
19770b326 mm: filter based ... |
1844 |
struct zonelist *zonelist; |
19770b326 mm: filter based ... |
1845 |
enum zone_type highest_zoneidx = gfp_zone(GFP_KERNEL); |
c9634cf01 mm: use zonelist ... |
1846 |
zonelist = &NODE_DATA(node)->node_zonelists[ZONELIST_FALLBACK]; |
c33d6c06f mm, page_alloc: a... |
1847 1848 |
z = first_zones_zonelist(zonelist, highest_zoneidx, &policy->v.nodes); |
c1093b746 mm: access zone->... |
1849 |
return z->zone ? zone_to_nid(z->zone) : node; |
dd1a239f6 mm: have zonelist... |
1850 |
} |
dc85da15d [PATCH] NUMA poli... |
1851 |
|
dc85da15d [PATCH] NUMA poli... |
1852 |
default: |
bea904d54 mempolicy: use MP... |
1853 |
BUG(); |
dc85da15d [PATCH] NUMA poli... |
1854 1855 |
} } |
fee83b3ab mm/mempolicy.c:of... |
1856 1857 1858 1859 1860 |
/* * Do static interleaving for a VMA with known offset @n. Returns the n'th * node in pol->v.nodes (starting from n=0), wrapping around if n exceeds the * number of present nodes. */ |
98c70baad mm: remove useles... |
1861 |
static unsigned offset_il_node(struct mempolicy *pol, unsigned long n) |
1da177e4c Linux-2.6.12-rc2 |
1862 |
{ |
dfcd3c0dc [PATCH] Convert m... |
1863 |
unsigned nnodes = nodes_weight(pol->v.nodes); |
f5b087b52 mempolicy: add MP... |
1864 |
unsigned target; |
fee83b3ab mm/mempolicy.c:of... |
1865 1866 |
int i; int nid; |
1da177e4c Linux-2.6.12-rc2 |
1867 |
|
f5b087b52 mempolicy: add MP... |
1868 1869 |
if (!nnodes) return numa_node_id(); |
fee83b3ab mm/mempolicy.c:of... |
1870 1871 1872 |
target = (unsigned int)n % nnodes; nid = first_node(pol->v.nodes); for (i = 0; i < target; i++) |
dfcd3c0dc [PATCH] Convert m... |
1873 |
nid = next_node(nid, pol->v.nodes); |
1da177e4c Linux-2.6.12-rc2 |
1874 1875 |
return nid; } |
5da7ca860 [PATCH] Add NUMA ... |
1876 1877 1878 1879 1880 1881 |
/* 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 ... |
1882 1883 1884 1885 1886 1887 1888 1889 1890 |
/* * 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 ... |
1891 |
off += (addr - vma->vm_start) >> shift; |
98c70baad mm: remove useles... |
1892 |
return offset_il_node(pol, off); |
5da7ca860 [PATCH] Add NUMA ... |
1893 1894 1895 |
} else return interleave_nodes(pol); } |
00ac59adf [PATCH] x86_64: F... |
1896 |
#ifdef CONFIG_HUGETLBFS |
480eccf9a Fix NUMA Memory P... |
1897 |
/* |
04ec6264f mm, page_alloc: p... |
1898 |
* huge_node(@vma, @addr, @gfp_flags, @mpol) |
b46e14acb mm/mempolicy.c: p... |
1899 1900 1901 1902 1903 |
* @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 * @nodemask: pointer to nodemask pointer for MPOL_BIND nodemask |
480eccf9a Fix NUMA Memory P... |
1904 |
* |
04ec6264f mm, page_alloc: p... |
1905 |
* Returns a nid suitable for a huge page allocation and a pointer |
52cd3b074 mempolicy: rework... |
1906 1907 1908 |
* to the struct mempolicy for conditional unref after allocation. * If the effective policy is 'BIND, returns a pointer to the mempolicy's * @nodemask for filtering the zonelist. |
c0ff7453b cpuset,mm: fix no... |
1909 |
* |
d26914d11 mm: optimize put_... |
1910 |
* Must be protected by read_mems_allowed_begin() |
480eccf9a Fix NUMA Memory P... |
1911 |
*/ |
04ec6264f mm, page_alloc: p... |
1912 1913 |
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 ... |
1914 |
{ |
04ec6264f mm, page_alloc: p... |
1915 |
int nid; |
5da7ca860 [PATCH] Add NUMA ... |
1916 |
|
dd6eecb91 mempolicy: unexpo... |
1917 |
*mpol = get_vma_policy(vma, addr); |
19770b326 mm: filter based ... |
1918 |
*nodemask = NULL; /* assume !MPOL_BIND */ |
5da7ca860 [PATCH] Add NUMA ... |
1919 |
|
52cd3b074 mempolicy: rework... |
1920 |
if (unlikely((*mpol)->mode == MPOL_INTERLEAVE)) { |
04ec6264f mm, page_alloc: p... |
1921 1922 |
nid = interleave_nid(*mpol, vma, addr, huge_page_shift(hstate_vma(vma))); |
52cd3b074 mempolicy: rework... |
1923 |
} else { |
04ec6264f mm, page_alloc: p... |
1924 |
nid = policy_node(gfp_flags, *mpol, numa_node_id()); |
52cd3b074 mempolicy: rework... |
1925 1926 |
if ((*mpol)->mode == MPOL_BIND) *nodemask = &(*mpol)->v.nodes; |
480eccf9a Fix NUMA Memory P... |
1927 |
} |
04ec6264f mm, page_alloc: p... |
1928 |
return nid; |
5da7ca860 [PATCH] Add NUMA ... |
1929 |
} |
06808b082 hugetlb: derive h... |
1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 |
/* * 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; int nid; if (!(mask && current->mempolicy)) return false; |
c0ff7453b cpuset,mm: fix no... |
1954 |
task_lock(current); |
06808b082 hugetlb: derive h... |
1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 |
mempolicy = current->mempolicy; switch (mempolicy->mode) { case MPOL_PREFERRED: if (mempolicy->flags & MPOL_F_LOCAL) nid = numa_node_id(); else nid = mempolicy->v.preferred_node; init_nodemask_of_node(mask, nid); break; case MPOL_BIND: |
06808b082 hugetlb: derive h... |
1966 1967 1968 1969 1970 1971 1972 |
case MPOL_INTERLEAVE: *mask = mempolicy->v.nodes; break; default: BUG(); } |
c0ff7453b cpuset,mm: fix no... |
1973 |
task_unlock(current); |
06808b082 hugetlb: derive h... |
1974 1975 1976 |
return true; } |
00ac59adf [PATCH] x86_64: F... |
1977 |
#endif |
5da7ca860 [PATCH] Add NUMA ... |
1978 |
|
6f48d0ebd oom: select task ... |
1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 |
/* * mempolicy_nodemask_intersects * * If tsk's mempolicy is "default" [NULL], return 'true' to indicate default * policy. Otherwise, check for intersection between mask and the policy * nodemask for 'bind' or 'interleave' policy. For 'perferred' or 'local' * policy, always return true since it may allocate elsewhere on fallback. * * Takes task_lock(tsk) to prevent freeing of its mempolicy. */ bool mempolicy_nodemask_intersects(struct task_struct *tsk, const nodemask_t *mask) { struct mempolicy *mempolicy; bool ret = true; if (!mask) return ret; task_lock(tsk); mempolicy = tsk->mempolicy; if (!mempolicy) goto out; switch (mempolicy->mode) { case MPOL_PREFERRED: /* * MPOL_PREFERRED and MPOL_F_LOCAL are only preferred nodes to * allocate from, they may fallback to other nodes when oom. * Thus, it's possible for tsk to have allocated memory from * nodes in mask. */ break; case MPOL_BIND: case MPOL_INTERLEAVE: ret = nodes_intersects(mempolicy->v.nodes, *mask); break; default: BUG(); } out: task_unlock(tsk); return ret; } |
1da177e4c Linux-2.6.12-rc2 |
2022 2023 |
/* Allocate a page in interleaved policy. Own path because it needs to do special accounting. */ |
662f3a0b9 [PATCH] Remove ne... |
2024 2025 |
static struct page *alloc_page_interleave(gfp_t gfp, unsigned order, unsigned nid) |
1da177e4c Linux-2.6.12-rc2 |
2026 |
{ |
1da177e4c Linux-2.6.12-rc2 |
2027 |
struct page *page; |
04ec6264f mm, page_alloc: p... |
2028 |
page = __alloc_pages(gfp, order, nid); |
4518085e1 mm, sysctl: make ... |
2029 2030 2031 |
/* 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... |
2032 2033 2034 2035 2036 |
if (page && page_to_nid(page) == nid) { preempt_disable(); __inc_numa_state(page_zone(page), NUMA_INTERLEAVE_HIT); preempt_enable(); } |
1da177e4c Linux-2.6.12-rc2 |
2037 2038 2039 2040 |
return page; } /** |
0bbbc0b33 thp: add numa awa... |
2041 |
* alloc_pages_vma - Allocate a page for a VMA. |
1da177e4c Linux-2.6.12-rc2 |
2042 2043 2044 2045 2046 2047 2048 2049 |
* * @gfp: * %GFP_USER user allocation. * %GFP_KERNEL kernel allocations, * %GFP_HIGHMEM highmem/user allocations, * %GFP_FS allocation should not call back into a file system. * %GFP_ATOMIC don't sleep. * |
0bbbc0b33 thp: add numa awa... |
2050 |
* @order:Order of the GFP allocation. |
1da177e4c Linux-2.6.12-rc2 |
2051 2052 |
* @vma: Pointer to VMA or NULL if not available. * @addr: Virtual Address of the allocation. Must be inside the VMA. |
be97a41b2 mm/mempolicy.c: m... |
2053 |
* @node: Which node to prefer for allocation (modulo policy). |
19deb7695 Revert "Revert "R... |
2054 |
* @hugepage: for hugepages try only the preferred node if possible |
1da177e4c Linux-2.6.12-rc2 |
2055 2056 2057 |
* * This function allocates a page from the kernel page pool and applies * a NUMA policy associated with the VMA or the current process. |
3e4e28c5a mmap locking API:... |
2058 |
* When VMA is not NULL caller must read-lock the mmap_lock of the |
1da177e4c Linux-2.6.12-rc2 |
2059 |
* mm_struct of the VMA to prevent it from going away. Should be used for |
be97a41b2 mm/mempolicy.c: m... |
2060 2061 |
* all allocations for pages that will be mapped into user space. Returns * NULL when no page can be allocated. |
1da177e4c Linux-2.6.12-rc2 |
2062 2063 |
*/ struct page * |
0bbbc0b33 thp: add numa awa... |
2064 |
alloc_pages_vma(gfp_t gfp, int order, struct vm_area_struct *vma, |
19deb7695 Revert "Revert "R... |
2065 |
unsigned long addr, int node, bool hugepage) |
1da177e4c Linux-2.6.12-rc2 |
2066 |
{ |
cc9a6c877 cpuset: mm: reduc... |
2067 |
struct mempolicy *pol; |
c0ff7453b cpuset,mm: fix no... |
2068 |
struct page *page; |
04ec6264f mm, page_alloc: p... |
2069 |
int preferred_nid; |
be97a41b2 mm/mempolicy.c: m... |
2070 |
nodemask_t *nmask; |
cc9a6c877 cpuset: mm: reduc... |
2071 |
|
dd6eecb91 mempolicy: unexpo... |
2072 |
pol = get_vma_policy(vma, addr); |
1da177e4c Linux-2.6.12-rc2 |
2073 |
|
0867a57c4 mm, thp: respect ... |
2074 2075 2076 2077 2078 2079 2080 |
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... |
2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096 2097 2098 2099 2100 2101 |
} 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. * * If the policy is interleave, or does not allow the current * node in its nodemask, we allocate the standard way. */ if (pol->mode == MPOL_PREFERRED && !(pol->flags & MPOL_F_LOCAL)) hpage_node = pol->v.preferred_node; nmask = policy_nodemask(gfp, pol); if (!nmask || node_isset(hpage_node, *nmask)) { mpol_cond_put(pol); |
cc638f329 mm, thp: tweak re... |
2102 2103 2104 2105 |
/* * First, try to allocate THP only on local node, but * don't reclaim unnecessarily, just compact. */ |
19deb7695 Revert "Revert "R... |
2106 |
page = __alloc_pages_node(hpage_node, |
cc638f329 mm, thp: tweak re... |
2107 |
gfp | __GFP_THISNODE | __GFP_NORETRY, order); |
76e654cc9 mm, page_alloc: a... |
2108 2109 2110 2111 2112 |
/* * 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... |
2113 |
* memory with both reclaim and compact as well. |
76e654cc9 mm, page_alloc: a... |
2114 2115 2116 |
*/ if (!page && (gfp & __GFP_DIRECT_RECLAIM)) page = __alloc_pages_node(hpage_node, |
cc638f329 mm, thp: tweak re... |
2117 |
gfp, order); |
76e654cc9 mm, page_alloc: a... |
2118 |
|
19deb7695 Revert "Revert "R... |
2119 2120 |
goto out; } |
be97a41b2 mm/mempolicy.c: m... |
2121 |
} |
be97a41b2 mm/mempolicy.c: m... |
2122 |
nmask = policy_nodemask(gfp, pol); |
04ec6264f mm, page_alloc: p... |
2123 2124 |
preferred_nid = policy_node(gfp, pol, node); page = __alloc_pages_nodemask(gfp, order, preferred_nid, nmask); |
d51e9894d mm/mempolicy.c: d... |
2125 |
mpol_cond_put(pol); |
be97a41b2 mm/mempolicy.c: m... |
2126 |
out: |
c0ff7453b cpuset,mm: fix no... |
2127 |
return page; |
1da177e4c Linux-2.6.12-rc2 |
2128 |
} |
692622157 mm: export alloc_... |
2129 |
EXPORT_SYMBOL(alloc_pages_vma); |
1da177e4c Linux-2.6.12-rc2 |
2130 2131 2132 2133 2134 2135 2136 2137 2138 2139 2140 2141 2142 2143 2144 |
/** * alloc_pages_current - Allocate pages. * * @gfp: * %GFP_USER user allocation, * %GFP_KERNEL kernel allocation, * %GFP_HIGHMEM highmem allocation, * %GFP_FS don't call back into a file system. * %GFP_ATOMIC don't sleep. * @order: Power of two of allocation size in pages. 0 is a single page. * * Allocate a page from the kernel page pool. When not in * interrupt context and apply the current process NUMA policy. * Returns NULL when no page can be allocated. |
1da177e4c Linux-2.6.12-rc2 |
2145 |
*/ |
dd0fc66fb [PATCH] gfp flags... |
2146 |
struct page *alloc_pages_current(gfp_t gfp, unsigned order) |
1da177e4c Linux-2.6.12-rc2 |
2147 |
{ |
8d90274b3 mempolicy: saniti... |
2148 |
struct mempolicy *pol = &default_policy; |
c0ff7453b cpuset,mm: fix no... |
2149 |
struct page *page; |
1da177e4c Linux-2.6.12-rc2 |
2150 |
|
8d90274b3 mempolicy: saniti... |
2151 2152 |
if (!in_interrupt() && !(gfp & __GFP_THISNODE)) pol = get_task_policy(current); |
52cd3b074 mempolicy: rework... |
2153 2154 2155 2156 2157 |
/* * No reference counting needed for current->mempolicy * nor system default_policy */ |
45c4745af mempolicy: rename... |
2158 |
if (pol->mode == MPOL_INTERLEAVE) |
c0ff7453b cpuset,mm: fix no... |
2159 2160 2161 |
page = alloc_page_interleave(gfp, order, interleave_nodes(pol)); else page = __alloc_pages_nodemask(gfp, order, |
04ec6264f mm, page_alloc: p... |
2162 |
policy_node(gfp, pol, numa_node_id()), |
5c4b4be3b mm: use correct n... |
2163 |
policy_nodemask(gfp, pol)); |
cc9a6c877 cpuset: mm: reduc... |
2164 |
|
c0ff7453b cpuset,mm: fix no... |
2165 |
return page; |
1da177e4c Linux-2.6.12-rc2 |
2166 2167 |
} EXPORT_SYMBOL(alloc_pages_current); |
ef0855d33 mm: mempolicy: tu... |
2168 2169 2170 2171 2172 2173 2174 2175 2176 |
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... |
2177 |
/* |
846a16bf0 mempolicy: rename... |
2178 |
* If mpol_dup() sees current->cpuset == cpuset_being_rebound, then it |
4225399a6 [PATCH] cpuset: r... |
2179 2180 2181 2182 |
* 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... |
2183 2184 2185 |
* * 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... |
2186 |
*/ |
4225399a6 [PATCH] cpuset: r... |
2187 |
|
846a16bf0 mempolicy: rename... |
2188 2189 |
/* Slow path of a mempolicy duplicate */ struct mempolicy *__mpol_dup(struct mempolicy *old) |
1da177e4c Linux-2.6.12-rc2 |
2190 2191 2192 2193 2194 |
{ struct mempolicy *new = kmem_cache_alloc(policy_cache, GFP_KERNEL); if (!new) return ERR_PTR(-ENOMEM); |
708c1bbc9 mempolicy: restru... |
2195 2196 2197 2198 2199 2200 2201 2202 |
/* 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... |
2203 2204 |
if (current_cpuset_is_being_rebound()) { nodemask_t mems = cpuset_mems_allowed(current); |
213980c0f mm, mempolicy: si... |
2205 |
mpol_rebind_policy(new, &mems); |
4225399a6 [PATCH] cpuset: r... |
2206 |
} |
1da177e4c Linux-2.6.12-rc2 |
2207 |
atomic_set(&new->refcnt, 1); |
1da177e4c Linux-2.6.12-rc2 |
2208 2209 2210 2211 |
return new; } /* Slow path of a mempolicy comparison */ |
fcfb4dcc9 mm/mempolicy.c: m... |
2212 |
bool __mpol_equal(struct mempolicy *a, struct mempolicy *b) |
1da177e4c Linux-2.6.12-rc2 |
2213 2214 |
{ if (!a || !b) |
fcfb4dcc9 mm/mempolicy.c: m... |
2215 |
return false; |
45c4745af mempolicy: rename... |
2216 |
if (a->mode != b->mode) |
fcfb4dcc9 mm/mempolicy.c: m... |
2217 |
return false; |
198005025 mempolicy: remove... |
2218 |
if (a->flags != b->flags) |
fcfb4dcc9 mm/mempolicy.c: m... |
2219 |
return false; |
198005025 mempolicy: remove... |
2220 2221 |
if (mpol_store_user_nodemask(a)) if (!nodes_equal(a->w.user_nodemask, b->w.user_nodemask)) |
fcfb4dcc9 mm/mempolicy.c: m... |
2222 |
return false; |
198005025 mempolicy: remove... |
2223 |
|
45c4745af mempolicy: rename... |
2224 |
switch (a->mode) { |
19770b326 mm: filter based ... |
2225 |
case MPOL_BIND: |
1da177e4c Linux-2.6.12-rc2 |
2226 |
case MPOL_INTERLEAVE: |
fcfb4dcc9 mm/mempolicy.c: m... |
2227 |
return !!nodes_equal(a->v.nodes, b->v.nodes); |
1da177e4c Linux-2.6.12-rc2 |
2228 |
case MPOL_PREFERRED: |
8970a63e9 mm/mempolicy.c: a... |
2229 2230 2231 |
/* a's ->flags is the same as b's */ if (a->flags & MPOL_F_LOCAL) return true; |
757196618 mempolicy: remove... |
2232 |
return a->v.preferred_node == b->v.preferred_node; |
1da177e4c Linux-2.6.12-rc2 |
2233 2234 |
default: BUG(); |
fcfb4dcc9 mm/mempolicy.c: m... |
2235 |
return false; |
1da177e4c Linux-2.6.12-rc2 |
2236 2237 |
} } |
1da177e4c Linux-2.6.12-rc2 |
2238 |
/* |
1da177e4c Linux-2.6.12-rc2 |
2239 2240 2241 2242 |
* 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... |
2243 |
* They are protected by the sp->lock rwlock, which should be held |
1da177e4c Linux-2.6.12-rc2 |
2244 2245 |
* for any accesses to the tree. */ |
4a8c7bb59 mm/mempolicy.c: c... |
2246 2247 2248 2249 |
/* * lookup first element intersecting start-end. Caller holds sp->lock for * reading or for writing */ |
1da177e4c Linux-2.6.12-rc2 |
2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 2271 2272 2273 2274 2275 2276 2277 2278 |
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... |
2279 2280 2281 2282 |
/* * Insert a new shared policy into the list. Caller holds sp->lock for * writing. */ |
1da177e4c Linux-2.6.12-rc2 |
2283 2284 2285 2286 2287 2288 2289 2290 2291 2292 2293 2294 2295 2296 2297 2298 2299 2300 |
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: ... |
2301 2302 |
pr_debug("inserting %lx-%lx: %d ", new->start, new->end, |
45c4745af mempolicy: rename... |
2303 |
new->policy ? new->policy->mode : 0); |
1da177e4c Linux-2.6.12-rc2 |
2304 2305 2306 2307 2308 2309 2310 2311 2312 2313 2314 |
} /* 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... |
2315 |
read_lock(&sp->lock); |
1da177e4c Linux-2.6.12-rc2 |
2316 2317 2318 2319 2320 |
sn = sp_lookup(sp, idx, idx+1); if (sn) { mpol_get(sn->policy); pol = sn->policy; } |
4a8c7bb59 mm/mempolicy.c: c... |
2321 |
read_unlock(&sp->lock); |
1da177e4c Linux-2.6.12-rc2 |
2322 2323 |
return pol; } |
63f74ca21 mempolicy: fix re... |
2324 2325 2326 2327 2328 |
static void sp_free(struct sp_node *n) { mpol_put(n->policy); kmem_cache_free(sn_cache, n); } |
771fb4d80 mm: mempolicy: Ch... |
2329 2330 2331 |
/** * mpol_misplaced - check whether current page node is valid in policy * |
b46e14acb mm/mempolicy.c: p... |
2332 2333 2334 |
* @page: page to be checked * @vma: vm area where page mapped * @addr: virtual address where page mapped |
771fb4d80 mm: mempolicy: Ch... |
2335 2336 2337 2338 2339 2340 2341 2342 2343 2344 2345 2346 2347 2348 |
* * Lookup current policy node id for vma,addr and "compare to" page's * node id. * * Returns: * -1 - not misplaced, page is in the right node * node - node id where the page should be * * Policy determination "mimics" alloc_page_vma(). * Called from fault path where we know the vma and faulting address. */ int mpol_misplaced(struct page *page, struct vm_area_struct *vma, unsigned long addr) { struct mempolicy *pol; |
c33d6c06f mm, page_alloc: a... |
2349 |
struct zoneref *z; |
771fb4d80 mm: mempolicy: Ch... |
2350 2351 |
int curnid = page_to_nid(page); unsigned long pgoff; |
90572890d mm: numa: Change ... |
2352 2353 |
int thiscpu = raw_smp_processor_id(); int thisnid = cpu_to_node(thiscpu); |
98fa15f34 mm: replace all o... |
2354 |
int polnid = NUMA_NO_NODE; |
771fb4d80 mm: mempolicy: Ch... |
2355 |
int ret = -1; |
dd6eecb91 mempolicy: unexpo... |
2356 |
pol = get_vma_policy(vma, addr); |
771fb4d80 mm: mempolicy: Ch... |
2357 2358 2359 2360 2361 |
if (!(pol->flags & MPOL_F_MOF)) goto out; switch (pol->mode) { case MPOL_INTERLEAVE: |
771fb4d80 mm: mempolicy: Ch... |
2362 2363 |
pgoff = vma->vm_pgoff; pgoff += (addr - vma->vm_start) >> PAGE_SHIFT; |
98c70baad mm: remove useles... |
2364 |
polnid = offset_il_node(pol, pgoff); |
771fb4d80 mm: mempolicy: Ch... |
2365 2366 2367 2368 2369 2370 2371 2372 2373 2374 |
break; case MPOL_PREFERRED: if (pol->flags & MPOL_F_LOCAL) polnid = numa_node_id(); else polnid = pol->v.preferred_node; break; case MPOL_BIND: |
c33d6c06f mm, page_alloc: a... |
2375 |
|
771fb4d80 mm: mempolicy: Ch... |
2376 2377 2378 2379 2380 2381 2382 2383 |
/* * allows binding to multiple nodes. * use current page if in policy nodemask, * else select nearest allowed node, if any. * If no allowed nodes, use current [!misplaced]. */ if (node_isset(curnid, pol->v.nodes)) goto out; |
c33d6c06f mm, page_alloc: a... |
2384 |
z = first_zones_zonelist( |
771fb4d80 mm: mempolicy: Ch... |
2385 2386 |
node_zonelist(numa_node_id(), GFP_HIGHUSER), gfp_zone(GFP_HIGHUSER), |
c33d6c06f mm, page_alloc: a... |
2387 |
&pol->v.nodes); |
c1093b746 mm: access zone->... |
2388 |
polnid = zone_to_nid(z->zone); |
771fb4d80 mm: mempolicy: Ch... |
2389 2390 2391 2392 2393 |
break; default: BUG(); } |
5606e3877 mm: numa: Migrate... |
2394 2395 |
/* Migrate the page towards the node whose CPU is referencing it */ |
e42c8ff29 mm: numa: Use a t... |
2396 |
if (pol->flags & MPOL_F_MORON) { |
90572890d mm: numa: Change ... |
2397 |
polnid = thisnid; |
5606e3877 mm: numa: Migrate... |
2398 |
|
10f390427 sched/numa, mm: U... |
2399 |
if (!should_numa_migrate_memory(current, page, curnid, thiscpu)) |
de1c9ce6f sched/numa: Skip ... |
2400 |
goto out; |
e42c8ff29 mm: numa: Use a t... |
2401 |
} |
771fb4d80 mm: mempolicy: Ch... |
2402 2403 2404 2405 2406 2407 2408 |
if (curnid != polnid) ret = polnid; out: mpol_cond_put(pol); return ret; } |
c11600e4f mm, mempolicy: ta... |
2409 2410 2411 2412 2413 2414 2415 2416 2417 2418 2419 2420 2421 2422 2423 2424 |
/* * 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 |
2425 2426 |
static void sp_delete(struct shared_policy *sp, struct sp_node *n) { |
140d5a490 numa: mempolicy: ... |
2427 2428 |
pr_debug("deleting %lx-l%lx ", n->start, n->end); |
1da177e4c Linux-2.6.12-rc2 |
2429 |
rb_erase(&n->nd, &sp->root); |
63f74ca21 mempolicy: fix re... |
2430 |
sp_free(n); |
1da177e4c Linux-2.6.12-rc2 |
2431 |
} |
42288fe36 mm: mempolicy: Co... |
2432 2433 2434 2435 2436 2437 2438 |
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... |
2439 2440 |
static struct sp_node *sp_alloc(unsigned long start, unsigned long end, struct mempolicy *pol) |
1da177e4c Linux-2.6.12-rc2 |
2441 |
{ |
869833f2c mempolicy: remove... |
2442 2443 |
struct sp_node *n; struct mempolicy *newpol; |
1da177e4c Linux-2.6.12-rc2 |
2444 |
|
869833f2c mempolicy: remove... |
2445 |
n = kmem_cache_alloc(sn_cache, GFP_KERNEL); |
1da177e4c Linux-2.6.12-rc2 |
2446 2447 |
if (!n) return NULL; |
869833f2c mempolicy: remove... |
2448 2449 2450 2451 2452 2453 2454 |
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... |
2455 |
sp_node_init(n, start, end, newpol); |
869833f2c mempolicy: remove... |
2456 |
|
1da177e4c Linux-2.6.12-rc2 |
2457 2458 2459 2460 2461 2462 2463 |
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 ... |
2464 |
struct sp_node *n; |
42288fe36 mm: mempolicy: Co... |
2465 2466 |
struct sp_node *n_new = NULL; struct mempolicy *mpol_new = NULL; |
b22d127a3 mempolicy: fix a ... |
2467 |
int ret = 0; |
1da177e4c Linux-2.6.12-rc2 |
2468 |
|
42288fe36 mm: mempolicy: Co... |
2469 |
restart: |
4a8c7bb59 mm/mempolicy.c: c... |
2470 |
write_lock(&sp->lock); |
1da177e4c Linux-2.6.12-rc2 |
2471 2472 2473 2474 2475 2476 2477 2478 2479 2480 2481 2482 |
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... |
2483 2484 2485 2486 2487 |
if (!n_new) goto alloc_new; *mpol_new = *n->policy; atomic_set(&mpol_new->refcnt, 1); |
7880639c3 mm/mempolicy.c: f... |
2488 |
sp_node_init(n_new, end, n->end, mpol_new); |
1da177e4c Linux-2.6.12-rc2 |
2489 |
n->end = start; |
5ca395751 mm/mempolicy.c: f... |
2490 |
sp_insert(sp, n_new); |
42288fe36 mm: mempolicy: Co... |
2491 2492 |
n_new = NULL; mpol_new = NULL; |
1da177e4c Linux-2.6.12-rc2 |
2493 2494 2495 2496 2497 2498 2499 2500 2501 2502 |
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... |
2503 |
write_unlock(&sp->lock); |
42288fe36 mm: mempolicy: Co... |
2504 2505 2506 2507 2508 2509 2510 |
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 ... |
2511 |
return ret; |
42288fe36 mm: mempolicy: Co... |
2512 2513 |
alloc_new: |
4a8c7bb59 mm/mempolicy.c: c... |
2514 |
write_unlock(&sp->lock); |
42288fe36 mm: mempolicy: Co... |
2515 2516 2517 2518 2519 2520 2521 2522 |
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; goto restart; |
1da177e4c Linux-2.6.12-rc2 |
2523 |
} |
71fe804b6 mempolicy: use st... |
2524 2525 2526 2527 2528 2529 2530 2531 |
/** * 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... |
2532 |
* This is called at get_inode() calls and we can use GFP_KERNEL. |
71fe804b6 mempolicy: use st... |
2533 2534 2535 |
*/ void mpol_shared_policy_init(struct shared_policy *sp, struct mempolicy *mpol) { |
58568d2a8 cpuset,mm: update... |
2536 |
int ret; |
71fe804b6 mempolicy: use st... |
2537 |
sp->root = RB_ROOT; /* empty tree == default mempolicy */ |
4a8c7bb59 mm/mempolicy.c: c... |
2538 |
rwlock_init(&sp->lock); |
71fe804b6 mempolicy: use st... |
2539 2540 2541 2542 |
if (mpol) { struct vm_area_struct pvma; struct mempolicy *new; |
4bfc44958 mm: make set_memp... |
2543 |
NODEMASK_SCRATCH(scratch); |
71fe804b6 mempolicy: use st... |
2544 |
|
4bfc44958 mm: make set_memp... |
2545 |
if (!scratch) |
5c0c16549 mempolicy: fix da... |
2546 |
goto put_mpol; |
71fe804b6 mempolicy: use st... |
2547 2548 |
/* contextualize the tmpfs mount point mempolicy */ new = mpol_new(mpol->mode, mpol->flags, &mpol->w.user_nodemask); |
15d77835a mempolicy: factor... |
2549 |
if (IS_ERR(new)) |
0cae3457b mempolicy: ERR_PT... |
2550 |
goto free_scratch; /* no valid nodemask intersection */ |
58568d2a8 cpuset,mm: update... |
2551 2552 |
task_lock(current); |
4bfc44958 mm: make set_memp... |
2553 |
ret = mpol_set_nodemask(new, &mpol->w.user_nodemask, scratch); |
58568d2a8 cpuset,mm: update... |
2554 |
task_unlock(current); |
15d77835a mempolicy: factor... |
2555 |
if (ret) |
5c0c16549 mempolicy: fix da... |
2556 |
goto put_new; |
71fe804b6 mempolicy: use st... |
2557 2558 |
/* Create pseudo-vma that contains just the policy */ |
2c4541e24 mm: use vma_init(... |
2559 |
vma_init(&pvma, NULL); |
71fe804b6 mempolicy: use st... |
2560 2561 |
pvma.vm_end = TASK_SIZE; /* policy covers entire file */ mpol_set_shared_policy(sp, &pvma, new); /* adds ref */ |
15d77835a mempolicy: factor... |
2562 |
|
5c0c16549 mempolicy: fix da... |
2563 |
put_new: |
71fe804b6 mempolicy: use st... |
2564 |
mpol_put(new); /* drop initial ref */ |
0cae3457b mempolicy: ERR_PT... |
2565 |
free_scratch: |
4bfc44958 mm: make set_memp... |
2566 |
NODEMASK_SCRATCH_FREE(scratch); |
5c0c16549 mempolicy: fix da... |
2567 2568 |
put_mpol: mpol_put(mpol); /* drop our incoming ref on sb mpol */ |
7339ff830 [PATCH] Add tmpfs... |
2569 2570 |
} } |
1da177e4c Linux-2.6.12-rc2 |
2571 2572 2573 2574 2575 2576 |
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... |
2577 2578 |
pr_debug("set_shared_policy %lx sz %lu %d %d %lx ", |
1da177e4c Linux-2.6.12-rc2 |
2579 |
vma->vm_pgoff, |
45c4745af mempolicy: rename... |
2580 |
sz, npol ? npol->mode : -1, |
028fec414 mempolicy: suppor... |
2581 |
npol ? npol->flags : -1, |
00ef2d2f8 mm: use NUMA_NO_NODE |
2582 |
npol ? nodes_addr(npol->v.nodes)[0] : NUMA_NO_NODE); |
1da177e4c Linux-2.6.12-rc2 |
2583 2584 2585 2586 2587 2588 2589 2590 |
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... |
2591 |
sp_free(new); |
1da177e4c Linux-2.6.12-rc2 |
2592 2593 2594 2595 2596 2597 2598 2599 2600 2601 2602 |
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... |
2603 |
write_lock(&p->lock); |
1da177e4c Linux-2.6.12-rc2 |
2604 2605 2606 2607 |
next = rb_first(&p->root); while (next) { n = rb_entry(next, struct sp_node, nd); next = rb_next(&n->nd); |
63f74ca21 mempolicy: fix re... |
2608 |
sp_delete(p, n); |
1da177e4c Linux-2.6.12-rc2 |
2609 |
} |
4a8c7bb59 mm/mempolicy.c: c... |
2610 |
write_unlock(&p->lock); |
1da177e4c Linux-2.6.12-rc2 |
2611 |
} |
1a687c2e9 mm: sched: numa: ... |
2612 |
#ifdef CONFIG_NUMA_BALANCING |
c297663c0 mm: numa: initial... |
2613 |
static int __initdata numabalancing_override; |
1a687c2e9 mm: sched: numa: ... |
2614 2615 2616 2617 2618 2619 2620 |
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... |
2621 2622 2623 |
/* Parsed by setup_numabalancing. override == 1 enables, -1 disables */ if (numabalancing_override) set_numabalancing_state(numabalancing_override == 1); |
b0dc2b9bb mm, numa: really ... |
2624 |
if (num_online_nodes() > 1 && !numabalancing_override) { |
756a025f0 mm: coalesce spli... |
2625 2626 |
pr_info("%s automatic NUMA balancing. Configure with numa_balancing= or the kernel.numa_balancing sysctl ", |
c297663c0 mm: numa: initial... |
2627 |
numabalancing_default ? "Enabling" : "Disabling"); |
1a687c2e9 mm: sched: numa: ... |
2628 2629 2630 2631 2632 2633 2634 2635 2636 |
set_numabalancing_state(numabalancing_default); } } static int __init setup_numabalancing(char *str) { int ret = 0; if (!str) goto out; |
1a687c2e9 mm: sched: numa: ... |
2637 2638 |
if (!strcmp(str, "enable")) { |
c297663c0 mm: numa: initial... |
2639 |
numabalancing_override = 1; |
1a687c2e9 mm: sched: numa: ... |
2640 2641 |
ret = 1; } else if (!strcmp(str, "disable")) { |
c297663c0 mm: numa: initial... |
2642 |
numabalancing_override = -1; |
1a687c2e9 mm: sched: numa: ... |
2643 2644 2645 2646 |
ret = 1; } out: if (!ret) |
4a404bea9 mm/mempolicy.c: c... |
2647 2648 |
pr_warn("Unable to parse numa_balancing= "); |
1a687c2e9 mm: sched: numa: ... |
2649 2650 2651 2652 2653 2654 2655 2656 2657 |
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 |
2658 2659 2660 |
/* assumes fs == KERNEL_DS */ void __init numa_policy_init(void) { |
b71636e29 numa: mempolicy: ... |
2661 2662 2663 |
nodemask_t interleave_nodes; unsigned long largest = 0; int nid, prefer = 0; |
1da177e4c Linux-2.6.12-rc2 |
2664 2665 |
policy_cache = kmem_cache_create("numa_policy", sizeof(struct mempolicy), |
20c2df83d mm: Remove slab d... |
2666 |
0, SLAB_PANIC, NULL); |
1da177e4c Linux-2.6.12-rc2 |
2667 2668 2669 |
sn_cache = kmem_cache_create("shared_policy_node", sizeof(struct sp_node), |
20c2df83d mm: Remove slab d... |
2670 |
0, SLAB_PANIC, NULL); |
1da177e4c Linux-2.6.12-rc2 |
2671 |
|
5606e3877 mm: numa: Migrate... |
2672 2673 2674 2675 2676 2677 2678 2679 |
for_each_node(nid) { preferred_node_policy[nid] = (struct mempolicy) { .refcnt = ATOMIC_INIT(1), .mode = MPOL_PREFERRED, .flags = MPOL_F_MOF | MPOL_F_MORON, .v = { .preferred_node = nid, }, }; } |
b71636e29 numa: mempolicy: ... |
2680 2681 2682 2683 2684 2685 |
/* * 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_... |
2686 |
for_each_node_state(nid, N_MEMORY) { |
b71636e29 numa: mempolicy: ... |
2687 2688 2689 2690 2691 2692 2693 2694 2695 2696 2697 2698 2699 2700 2701 2702 |
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 |
2703 |
|
028fec414 mempolicy: suppor... |
2704 |
if (do_set_mempolicy(MPOL_INTERLEAVE, 0, &interleave_nodes)) |
b1de0d139 mm: convert some ... |
2705 2706 |
pr_err("%s: interleaving failed ", __func__); |
1a687c2e9 mm: sched: numa: ... |
2707 2708 |
check_numabalancing_enable(); |
1da177e4c Linux-2.6.12-rc2 |
2709 |
} |
8bccd85ff [PATCH] Implement... |
2710 |
/* Reset policy of current process to default */ |
1da177e4c Linux-2.6.12-rc2 |
2711 2712 |
void numa_default_policy(void) { |
028fec414 mempolicy: suppor... |
2713 |
do_set_mempolicy(MPOL_DEFAULT, 0, NULL); |
1da177e4c Linux-2.6.12-rc2 |
2714 |
} |
68860ec10 [PATCH] cpusets: ... |
2715 |
|
4225399a6 [PATCH] cpuset: r... |
2716 |
/* |
095f1fc4e mempolicy: rework... |
2717 2718 2719 2720 |
* Parse and format mempolicy from/to strings */ /* |
f2a07f40d tmpfs mempolicy: ... |
2721 |
* "local" is implemented internally by MPOL_PREFERRED with MPOL_F_LOCAL flag. |
1a75a6c82 [PATCH] Fold numa... |
2722 |
*/ |
345ace9c7 mempolicy: rename... |
2723 2724 2725 2726 2727 2728 |
static const char * const policy_modes[] = { [MPOL_DEFAULT] = "default", [MPOL_PREFERRED] = "prefer", [MPOL_BIND] = "bind", [MPOL_INTERLEAVE] = "interleave", |
d3a710337 mm: mempolicy: Ad... |
2729 |
[MPOL_LOCAL] = "local", |
345ace9c7 mempolicy: rename... |
2730 |
}; |
1a75a6c82 [PATCH] Fold numa... |
2731 |
|
095f1fc4e mempolicy: rework... |
2732 2733 2734 |
#ifdef CONFIG_TMPFS /** |
f2a07f40d tmpfs mempolicy: ... |
2735 |
* mpol_parse_str - parse string to mempolicy, for tmpfs mpol mount option. |
095f1fc4e mempolicy: rework... |
2736 |
* @str: string containing mempolicy to parse |
71fe804b6 mempolicy: use st... |
2737 |
* @mpol: pointer to struct mempolicy pointer, returned on success. |
095f1fc4e mempolicy: rework... |
2738 2739 2740 2741 |
* * Format of input: * <mode>[=<flags>][:<nodelist>] * |
71fe804b6 mempolicy: use st... |
2742 |
* On success, returns 0, else 1 |
095f1fc4e mempolicy: rework... |
2743 |
*/ |
a7a88b237 mempolicy: remove... |
2744 |
int mpol_parse_str(char *str, struct mempolicy **mpol) |
095f1fc4e mempolicy: rework... |
2745 |
{ |
71fe804b6 mempolicy: use st... |
2746 |
struct mempolicy *new = NULL; |
f2a07f40d tmpfs mempolicy: ... |
2747 |
unsigned short mode_flags; |
71fe804b6 mempolicy: use st... |
2748 |
nodemask_t nodes; |
095f1fc4e mempolicy: rework... |
2749 2750 |
char *nodelist = strchr(str, ':'); char *flags = strchr(str, '='); |
dedf2c73b mm/mempolicy.c: u... |
2751 |
int err = 1, mode; |
095f1fc4e mempolicy: rework... |
2752 |
|
c7a91bc7c mm/mempolicy.c: f... |
2753 2754 |
if (flags) *flags++ = '\0'; /* terminate mode string */ |
095f1fc4e mempolicy: rework... |
2755 2756 2757 |
if (nodelist) { /* NUL-terminate mode or flags string */ *nodelist++ = '\0'; |
71fe804b6 mempolicy: use st... |
2758 |
if (nodelist_parse(nodelist, nodes)) |
095f1fc4e mempolicy: rework... |
2759 |
goto out; |
01f13bd60 mempolicy: use N_... |
2760 |
if (!nodes_subset(nodes, node_states[N_MEMORY])) |
095f1fc4e mempolicy: rework... |
2761 |
goto out; |
71fe804b6 mempolicy: use st... |
2762 2763 |
} else nodes_clear(nodes); |
dedf2c73b mm/mempolicy.c: u... |
2764 2765 |
mode = match_string(policy_modes, MPOL_MAX, str); if (mode < 0) |
095f1fc4e mempolicy: rework... |
2766 |
goto out; |
71fe804b6 mempolicy: use st... |
2767 |
switch (mode) { |
095f1fc4e mempolicy: rework... |
2768 |
case MPOL_PREFERRED: |
71fe804b6 mempolicy: use st... |
2769 |
/* |
aa9f7d517 mm: mempolicy: re... |
2770 2771 2772 |
* 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... |
2773 |
*/ |
095f1fc4e mempolicy: rework... |
2774 2775 2776 2777 |
if (nodelist) { char *rest = nodelist; while (isdigit(*rest)) rest++; |
926f2ae04 tmpfs: cleanup mp... |
2778 2779 |
if (*rest) goto out; |
aa9f7d517 mm: mempolicy: re... |
2780 2781 |
if (nodes_empty(nodes)) goto out; |
095f1fc4e mempolicy: rework... |
2782 2783 |
} break; |
095f1fc4e mempolicy: rework... |
2784 2785 2786 2787 2788 |
case MPOL_INTERLEAVE: /* * Default to online nodes with memory if no nodelist */ if (!nodelist) |
01f13bd60 mempolicy: use N_... |
2789 |
nodes = node_states[N_MEMORY]; |
3f226aa1c mempolicy: suppor... |
2790 |
break; |
71fe804b6 mempolicy: use st... |
2791 |
case MPOL_LOCAL: |
3f226aa1c mempolicy: suppor... |
2792 |
/* |
71fe804b6 mempolicy: use st... |
2793 |
* Don't allow a nodelist; mpol_new() checks flags |
3f226aa1c mempolicy: suppor... |
2794 |
*/ |
71fe804b6 mempolicy: use st... |
2795 |
if (nodelist) |
3f226aa1c mempolicy: suppor... |
2796 |
goto out; |
71fe804b6 mempolicy: use st... |
2797 |
mode = MPOL_PREFERRED; |
3f226aa1c mempolicy: suppor... |
2798 |
break; |
413b43dea tmpfs: fix oops o... |
2799 2800 2801 2802 2803 2804 2805 |
case MPOL_DEFAULT: /* * Insist on a empty nodelist */ if (!nodelist) err = 0; goto out; |
d69b2e63e tmpfs: mpol=bind:... |
2806 2807 2808 2809 2810 2811 |
case MPOL_BIND: /* * Insist on a nodelist */ if (!nodelist) goto out; |
095f1fc4e mempolicy: rework... |
2812 |
} |
71fe804b6 mempolicy: use st... |
2813 |
mode_flags = 0; |
095f1fc4e mempolicy: rework... |
2814 2815 2816 2817 2818 2819 |
if (flags) { /* * Currently, we only support two mutually exclusive * mode flags. */ if (!strcmp(flags, "static")) |
71fe804b6 mempolicy: use st... |
2820 |
mode_flags |= MPOL_F_STATIC_NODES; |
095f1fc4e mempolicy: rework... |
2821 |
else if (!strcmp(flags, "relative")) |
71fe804b6 mempolicy: use st... |
2822 |
mode_flags |= MPOL_F_RELATIVE_NODES; |
095f1fc4e mempolicy: rework... |
2823 |
else |
926f2ae04 tmpfs: cleanup mp... |
2824 |
goto out; |
095f1fc4e mempolicy: rework... |
2825 |
} |
71fe804b6 mempolicy: use st... |
2826 2827 2828 |
new = mpol_new(mode, mode_flags, &nodes); if (IS_ERR(new)) |
926f2ae04 tmpfs: cleanup mp... |
2829 |
goto out; |
f2a07f40d tmpfs mempolicy: ... |
2830 2831 2832 2833 2834 2835 2836 2837 2838 2839 2840 2841 2842 2843 2844 2845 |
/* * Save nodes for mpol_to_str() to show the tmpfs mount options * for /proc/mounts, /proc/pid/mounts and /proc/pid/mountinfo. */ if (mode != MPOL_PREFERRED) new->v.nodes = nodes; else if (nodelist) new->v.preferred_node = first_node(nodes); else new->flags |= MPOL_F_LOCAL; /* * 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... |
2846 |
err = 0; |
71fe804b6 mempolicy: use st... |
2847 |
|
095f1fc4e mempolicy: rework... |
2848 2849 2850 2851 2852 2853 |
out: /* Restore string for error message */ if (nodelist) *--nodelist = ':'; if (flags) *--flags = '='; |
71fe804b6 mempolicy: use st... |
2854 2855 |
if (!err) *mpol = new; |
095f1fc4e mempolicy: rework... |
2856 2857 2858 |
return err; } #endif /* CONFIG_TMPFS */ |
71fe804b6 mempolicy: use st... |
2859 2860 2861 2862 2863 |
/** * 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... |
2864 |
* |
948927ee9 mm, mempolicy: ma... |
2865 2866 2867 |
* 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... |
2868 |
*/ |
948927ee9 mm, mempolicy: ma... |
2869 |
void mpol_to_str(char *buffer, int maxlen, struct mempolicy *pol) |
1a75a6c82 [PATCH] Fold numa... |
2870 2871 |
{ char *p = buffer; |
948927ee9 mm, mempolicy: ma... |
2872 2873 2874 |
nodemask_t nodes = NODE_MASK_NONE; unsigned short mode = MPOL_DEFAULT; unsigned short flags = 0; |
2291990ab mempolicy: clean-... |
2875 |
|
8790c71a1 mm/mempolicy.c: f... |
2876 |
if (pol && pol != &default_policy && !(pol->flags & MPOL_F_MORON)) { |
bea904d54 mempolicy: use MP... |
2877 |
mode = pol->mode; |
948927ee9 mm, mempolicy: ma... |
2878 2879 |
flags = pol->flags; } |
bea904d54 mempolicy: use MP... |
2880 |
|
1a75a6c82 [PATCH] Fold numa... |
2881 2882 |
switch (mode) { case MPOL_DEFAULT: |
1a75a6c82 [PATCH] Fold numa... |
2883 |
break; |
1a75a6c82 [PATCH] Fold numa... |
2884 |
case MPOL_PREFERRED: |
fc36b8d3d mempolicy: use MP... |
2885 |
if (flags & MPOL_F_LOCAL) |
f2a07f40d tmpfs mempolicy: ... |
2886 |
mode = MPOL_LOCAL; |
53f2556b6 mempolicy: mPOL_P... |
2887 |
else |
fc36b8d3d mempolicy: use MP... |
2888 |
node_set(pol->v.preferred_node, nodes); |
1a75a6c82 [PATCH] Fold numa... |
2889 |
break; |
1a75a6c82 [PATCH] Fold numa... |
2890 |
case MPOL_BIND: |
1a75a6c82 [PATCH] Fold numa... |
2891 |
case MPOL_INTERLEAVE: |
f2a07f40d tmpfs mempolicy: ... |
2892 |
nodes = pol->v.nodes; |
1a75a6c82 [PATCH] Fold numa... |
2893 |
break; |
1a75a6c82 [PATCH] Fold numa... |
2894 |
default: |
948927ee9 mm, mempolicy: ma... |
2895 2896 2897 |
WARN_ON_ONCE(1); snprintf(p, maxlen, "unknown"); return; |
1a75a6c82 [PATCH] Fold numa... |
2898 |
} |
b7a9f420e mm, mempolicy: si... |
2899 |
p += snprintf(p, maxlen, "%s", policy_modes[mode]); |
1a75a6c82 [PATCH] Fold numa... |
2900 |
|
fc36b8d3d mempolicy: use MP... |
2901 |
if (flags & MPOL_MODE_FLAGS) { |
948927ee9 mm, mempolicy: ma... |
2902 |
p += snprintf(p, buffer + maxlen - p, "="); |
f5b087b52 mempolicy: add MP... |
2903 |
|
2291990ab mempolicy: clean-... |
2904 2905 2906 |
/* * Currently, the only defined flags are mutually exclusive */ |
f5b087b52 mempolicy: add MP... |
2907 |
if (flags & MPOL_F_STATIC_NODES) |
2291990ab mempolicy: clean-... |
2908 2909 2910 |
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... |
2911 |
} |
9e763e0f4 mm: use %*pb[l] t... |
2912 2913 2914 |
if (!nodes_empty(nodes)) p += scnprintf(p, buffer + maxlen - p, ":%*pbl", nodemask_pr_args(&nodes)); |
1a75a6c82 [PATCH] Fold numa... |
2915 |
} |