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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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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 * and mempolicy. May also be called holding the mmap_semaphore for write. */ |
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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_sem. Allocations using per-task * 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. * * Call holding a reference to mm. Takes mm->mmap_sem during call. */ void mpol_rebind_mm(struct mm_struct *mm, nodemask_t *new) { struct vm_area_struct *vma; down_write(&mm->mmap_sem); for (vma = mm->mmap; vma; vma = vma->vm_next) |
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mpol_rebind_policy(vma->vm_policy, new); |
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up_write(&mm->mmap_sem); } |
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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; struct vm_area_struct *prev; }; |
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/* |
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* 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); } |
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/* |
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* 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. |
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*/ |
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static int queue_pages_pmd(pmd_t *pmd, spinlock_t *ptl, unsigned long addr, unsigned long end, struct mm_walk *walk) { int ret = 0; struct page *page; struct queue_pages *qp = walk->private; unsigned long flags; if (unlikely(is_pmd_migration_entry(*pmd))) { |
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ret = -EIO; |
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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... |
433 |
ret = 2; |
c86337984 mm: mempolicy: mb... |
434 435 |
goto out; } |
d88354451 mm: mempolicy: ma... |
436 |
if (!queue_pages_required(page, qp)) |
c86337984 mm: mempolicy: mb... |
437 |
goto unlock; |
c86337984 mm: mempolicy: mb... |
438 |
|
c86337984 mm: mempolicy: mb... |
439 440 |
flags = qp->flags; /* go to thp migration */ |
a7f40cfe3 mm: mempolicy: ma... |
441 |
if (flags & (MPOL_MF_MOVE | MPOL_MF_MOVE_ALL)) { |
a53190a4a mm: mempolicy: ha... |
442 443 |
if (!vma_migratable(walk->vma) || migrate_page_add(page, qp->pagelist, flags)) { |
d88354451 mm: mempolicy: ma... |
444 |
ret = 1; |
a7f40cfe3 mm: mempolicy: ma... |
445 446 |
goto unlock; } |
a7f40cfe3 mm: mempolicy: ma... |
447 448 |
} else ret = -EIO; |
c86337984 mm: mempolicy: mb... |
449 450 451 452 453 |
unlock: spin_unlock(ptl); out: return ret; } |
88aaa2a1d mm: mempolicy: ad... |
454 |
/* |
980949457 mm/mempolicy: ren... |
455 456 |
* Scan through pages checking if pages follow certain conditions, * and move them to the pagelist if they do. |
d88354451 mm: mempolicy: ma... |
457 458 459 460 461 462 463 |
* * 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... |
464 |
*/ |
6f4576e36 mempolicy: apply ... |
465 466 |
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 |
467 |
{ |
6f4576e36 mempolicy: apply ... |
468 469 470 471 |
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... |
472 |
int ret; |
d88354451 mm: mempolicy: ma... |
473 |
bool has_unmovable = false; |
91612e0df [PATCH] mbind: ch... |
474 |
pte_t *pte; |
705e87c0c [PATCH] mm: pte_o... |
475 |
spinlock_t *ptl; |
941150a32 [PATCH] mbind: fi... |
476 |
|
c86337984 mm: mempolicy: mb... |
477 478 479 |
ptl = pmd_trans_huge_lock(pmd, vma); if (ptl) { ret = queue_pages_pmd(pmd, ptl, addr, end, walk); |
d88354451 mm: mempolicy: ma... |
480 |
if (ret != 2) |
a7f40cfe3 mm: mempolicy: ma... |
481 |
return ret; |
248db92da migrate_pages: tr... |
482 |
} |
d88354451 mm: mempolicy: ma... |
483 |
/* THP was split, fall through to pte walk */ |
91612e0df [PATCH] mbind: ch... |
484 |
|
337d9abf1 mm: thp: check pm... |
485 486 |
if (pmd_trans_unstable(pmd)) return 0; |
94723aafb mm: unclutter THP... |
487 |
|
6f4576e36 mempolicy: apply ... |
488 489 |
pte = pte_offset_map_lock(walk->mm, pmd, addr, &ptl); for (; addr != end; pte++, addr += PAGE_SIZE) { |
91612e0df [PATCH] mbind: ch... |
490 |
if (!pte_present(*pte)) |
1da177e4c Linux-2.6.12-rc2 |
491 |
continue; |
6aab341e0 mm: re-architect ... |
492 493 |
page = vm_normal_page(vma, addr, *pte); if (!page) |
1da177e4c Linux-2.6.12-rc2 |
494 |
continue; |
053837fce [PATCH] mm: migra... |
495 |
/* |
62b61f611 ksm: memory hotre... |
496 497 |
* vm_normal_page() filters out zero pages, but there might * still be PageReserved pages to skip, perhaps in a VDSO. |
053837fce [PATCH] mm: migra... |
498 |
*/ |
b79bc0a0c ksm: enable KSM p... |
499 |
if (PageReserved(page)) |
f4598c8b3 [PATCH] migration... |
500 |
continue; |
88aaa2a1d mm: mempolicy: ad... |
501 |
if (!queue_pages_required(page, qp)) |
38e35860d [PATCH] mempolici... |
502 |
continue; |
a7f40cfe3 mm: mempolicy: ma... |
503 |
if (flags & (MPOL_MF_MOVE | MPOL_MF_MOVE_ALL)) { |
d88354451 mm: mempolicy: ma... |
504 505 506 |
/* MPOL_MF_STRICT must be specified if we get here */ if (!vma_migratable(vma)) { has_unmovable = true; |
a7f40cfe3 mm: mempolicy: ma... |
507 |
break; |
d88354451 mm: mempolicy: ma... |
508 |
} |
a53190a4a mm: mempolicy: ha... |
509 510 511 512 513 514 515 516 |
/* * 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... |
517 518 |
} else break; |
6f4576e36 mempolicy: apply ... |
519 520 521 |
} pte_unmap_unlock(pte - 1, ptl); cond_resched(); |
d88354451 mm: mempolicy: ma... |
522 523 524 |
if (has_unmovable) return 1; |
a7f40cfe3 mm: mempolicy: ma... |
525 |
return addr != end ? -EIO : 0; |
91612e0df [PATCH] mbind: ch... |
526 |
} |
6f4576e36 mempolicy: apply ... |
527 528 529 |
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... |
530 531 |
{ #ifdef CONFIG_HUGETLB_PAGE |
6f4576e36 mempolicy: apply ... |
532 533 |
struct queue_pages *qp = walk->private; unsigned long flags = qp->flags; |
e2d8cf405 migrate: add huge... |
534 |
struct page *page; |
cb900f412 mm, hugetlb: conv... |
535 |
spinlock_t *ptl; |
d4c54919e mm: add !pte_pres... |
536 |
pte_t entry; |
e2d8cf405 migrate: add huge... |
537 |
|
6f4576e36 mempolicy: apply ... |
538 539 |
ptl = huge_pte_lock(hstate_vma(walk->vma), walk->mm, pte); entry = huge_ptep_get(pte); |
d4c54919e mm: add !pte_pres... |
540 541 542 |
if (!pte_present(entry)) goto unlock; page = pte_page(entry); |
88aaa2a1d mm: mempolicy: ad... |
543 |
if (!queue_pages_required(page, qp)) |
e2d8cf405 migrate: add huge... |
544 545 546 547 |
goto unlock; /* With MPOL_MF_MOVE, we migrate only unshared hugepage. */ if (flags & (MPOL_MF_MOVE_ALL) || (flags & MPOL_MF_MOVE && page_mapcount(page) == 1)) |
6f4576e36 mempolicy: apply ... |
548 |
isolate_huge_page(page, qp->pagelist); |
e2d8cf405 migrate: add huge... |
549 |
unlock: |
cb900f412 mm, hugetlb: conv... |
550 |
spin_unlock(ptl); |
e2d8cf405 migrate: add huge... |
551 552 553 |
#else BUG(); #endif |
91612e0df [PATCH] mbind: ch... |
554 |
return 0; |
1da177e4c Linux-2.6.12-rc2 |
555 |
} |
5877231f6 mm: Move change_p... |
556 |
#ifdef CONFIG_NUMA_BALANCING |
b24f53a0b mm: mempolicy: Ad... |
557 |
/* |
4b10e7d56 mm: mempolicy: Im... |
558 559 560 561 562 563 564 |
* 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... |
565 |
*/ |
4b10e7d56 mm: mempolicy: Im... |
566 567 |
unsigned long change_prot_numa(struct vm_area_struct *vma, unsigned long addr, unsigned long end) |
b24f53a0b mm: mempolicy: Ad... |
568 |
{ |
4b10e7d56 mm: mempolicy: Im... |
569 |
int nr_updated; |
b24f53a0b mm: mempolicy: Ad... |
570 |
|
4d9424669 mm: convert p[te|... |
571 |
nr_updated = change_protection(vma, addr, end, PAGE_NONE, 0, 1); |
03c5a6e16 mm: numa: Add pte... |
572 573 |
if (nr_updated) count_vm_numa_events(NUMA_PTE_UPDATES, nr_updated); |
b24f53a0b mm: mempolicy: Ad... |
574 |
|
4b10e7d56 mm: mempolicy: Im... |
575 |
return nr_updated; |
b24f53a0b mm: mempolicy: Ad... |
576 577 578 579 580 581 582 |
} #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... |
583 |
#endif /* CONFIG_NUMA_BALANCING */ |
b24f53a0b mm: mempolicy: Ad... |
584 |
|
6f4576e36 mempolicy: apply ... |
585 586 587 588 589 590 591 |
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; |
a7f40cfe3 mm: mempolicy: ma... |
592 593 594 595 596 597 |
/* * 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... |
598 |
return 1; |
6f4576e36 mempolicy: apply ... |
599 600 601 602 603 604 605 606 607 608 609 610 611 |
if (endvma > end) endvma = end; if (vma->vm_start > start) start = vma->vm_start; if (!(flags & MPOL_MF_DISCONTIG_OK)) { if (!vma->vm_next && vma->vm_end < end) return -EFAULT; if (qp->prev && qp->prev->vm_end < vma->vm_start) return -EFAULT; } qp->prev = vma; |
6f4576e36 mempolicy: apply ... |
612 613 |
if (flags & MPOL_MF_LAZY) { /* Similar to task_numa_work, skip inaccessible VMAs */ |
4355c018c mm/mempolicy.c: s... |
614 615 616 |
if (!is_vm_hugetlb_page(vma) && (vma->vm_flags & (VM_READ | VM_EXEC | VM_WRITE)) && !(vma->vm_flags & VM_MIXEDMAP)) |
6f4576e36 mempolicy: apply ... |
617 618 619 |
change_prot_numa(vma, start, endvma); return 1; } |
77bf45e78 mempolicy: do not... |
620 |
/* queue pages from current vma */ |
a7f40cfe3 mm: mempolicy: ma... |
621 |
if (flags & MPOL_MF_VALID) |
6f4576e36 mempolicy: apply ... |
622 623 624 |
return 0; return 1; } |
7b86ac337 pagewalk: separat... |
625 626 627 628 629 |
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... |
630 |
/* |
980949457 mm/mempolicy: ren... |
631 632 633 634 |
* 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... |
635 636 637 638 639 640 |
* 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... |
641 642 643 |
* 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... |
644 |
*/ |
d05f0cdcb mm: fix crashes f... |
645 |
static int |
980949457 mm/mempolicy: ren... |
646 |
queue_pages_range(struct mm_struct *mm, unsigned long start, unsigned long end, |
6f4576e36 mempolicy: apply ... |
647 648 |
nodemask_t *nodes, unsigned long flags, struct list_head *pagelist) |
1da177e4c Linux-2.6.12-rc2 |
649 |
{ |
6f4576e36 mempolicy: apply ... |
650 651 652 653 654 655 |
struct queue_pages qp = { .pagelist = pagelist, .flags = flags, .nmask = nodes, .prev = NULL, }; |
6f4576e36 mempolicy: apply ... |
656 |
|
7b86ac337 pagewalk: separat... |
657 |
return walk_page_range(mm, start, end, &queue_pages_walk_ops, &qp); |
1da177e4c Linux-2.6.12-rc2 |
658 |
} |
869833f2c mempolicy: remove... |
659 660 661 662 663 664 |
/* * Apply policy to a single VMA * This must be called with the mmap_sem held for writing. */ static int vma_replace_policy(struct vm_area_struct *vma, struct mempolicy *pol) |
8d34694c1 revert "mm: mempo... |
665 |
{ |
869833f2c mempolicy: remove... |
666 667 668 |
int err; struct mempolicy *old; struct mempolicy *new; |
8d34694c1 revert "mm: mempo... |
669 670 671 672 673 674 |
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... |
675 676 677 678 679 |
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... |
680 |
err = vma->vm_ops->set_policy(vma, new); |
869833f2c mempolicy: remove... |
681 682 |
if (err) goto err_out; |
8d34694c1 revert "mm: mempo... |
683 |
} |
869833f2c mempolicy: remove... |
684 685 686 687 688 689 690 691 |
old = vma->vm_policy; vma->vm_policy = new; /* protected by mmap_sem */ mpol_put(old); return 0; err_out: mpol_put(new); |
8d34694c1 revert "mm: mempo... |
692 693 |
return err; } |
1da177e4c Linux-2.6.12-rc2 |
694 |
/* Step 2: apply policy to a range and do splits. */ |
9d8cebd4b mm: fix mbind vma... |
695 696 |
static int mbind_range(struct mm_struct *mm, unsigned long start, unsigned long end, struct mempolicy *new_pol) |
1da177e4c Linux-2.6.12-rc2 |
697 698 |
{ struct vm_area_struct *next; |
9d8cebd4b mm: fix mbind vma... |
699 700 701 |
struct vm_area_struct *prev; struct vm_area_struct *vma; int err = 0; |
e26a51148 mm/mempolicy.c: r... |
702 |
pgoff_t pgoff; |
9d8cebd4b mm: fix mbind vma... |
703 704 |
unsigned long vmstart; unsigned long vmend; |
1da177e4c Linux-2.6.12-rc2 |
705 |
|
097d59106 vm: avoid using f... |
706 |
vma = find_vma(mm, start); |
9d8cebd4b mm: fix mbind vma... |
707 708 |
if (!vma || vma->vm_start > start) return -EFAULT; |
097d59106 vm: avoid using f... |
709 |
prev = vma->vm_prev; |
e26a51148 mm/mempolicy.c: r... |
710 711 |
if (start > vma->vm_start) prev = vma; |
9d8cebd4b mm: fix mbind vma... |
712 |
for (; vma && vma->vm_start < end; prev = vma, vma = next) { |
1da177e4c Linux-2.6.12-rc2 |
713 |
next = vma->vm_next; |
9d8cebd4b mm: fix mbind vma... |
714 715 |
vmstart = max(start, vma->vm_start); vmend = min(end, vma->vm_end); |
e26a51148 mm/mempolicy.c: r... |
716 717 718 719 720 |
if (mpol_equal(vma_policy(vma), new_pol)) continue; pgoff = vma->vm_pgoff + ((vmstart - vma->vm_start) >> PAGE_SHIFT); |
9d8cebd4b mm: fix mbind vma... |
721 |
prev = vma_merge(mm, prev, vmstart, vmend, vma->vm_flags, |
19a809afe userfaultfd: teac... |
722 723 |
vma->anon_vma, vma->vm_file, pgoff, new_pol, vma->vm_userfaultfd_ctx); |
9d8cebd4b mm: fix mbind vma... |
724 725 726 |
if (prev) { vma = prev; next = vma->vm_next; |
3964acd0d mm: mempolicy: fi... |
727 728 729 730 |
if (mpol_equal(vma_policy(vma), new_pol)) continue; /* vma_merge() joined vma && vma->next, case 8 */ goto replace; |
9d8cebd4b mm: fix mbind vma... |
731 732 733 734 735 736 737 738 739 740 741 |
} 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... |
742 |
replace: |
869833f2c mempolicy: remove... |
743 |
err = vma_replace_policy(vma, new_pol); |
8d34694c1 revert "mm: mempo... |
744 745 |
if (err) goto out; |
1da177e4c Linux-2.6.12-rc2 |
746 |
} |
9d8cebd4b mm: fix mbind vma... |
747 748 |
out: |
1da177e4c Linux-2.6.12-rc2 |
749 750 |
return err; } |
1da177e4c Linux-2.6.12-rc2 |
751 |
/* Set the process memory policy */ |
028fec414 mempolicy: suppor... |
752 753 |
static long do_set_mempolicy(unsigned short mode, unsigned short flags, nodemask_t *nodes) |
1da177e4c Linux-2.6.12-rc2 |
754 |
{ |
58568d2a8 cpuset,mm: update... |
755 |
struct mempolicy *new, *old; |
4bfc44958 mm: make set_memp... |
756 |
NODEMASK_SCRATCH(scratch); |
58568d2a8 cpuset,mm: update... |
757 |
int ret; |
1da177e4c Linux-2.6.12-rc2 |
758 |
|
4bfc44958 mm: make set_memp... |
759 760 |
if (!scratch) return -ENOMEM; |
f4e53d910 mempolicy: write ... |
761 |
|
4bfc44958 mm: make set_memp... |
762 763 764 765 766 |
new = mpol_new(mode, flags, nodes); if (IS_ERR(new)) { ret = PTR_ERR(new); goto out; } |
2c7c3a7d0 mempolicy: kill d... |
767 |
|
58568d2a8 cpuset,mm: update... |
768 |
task_lock(current); |
4bfc44958 mm: make set_memp... |
769 |
ret = mpol_set_nodemask(new, nodes, scratch); |
58568d2a8 cpuset,mm: update... |
770 771 |
if (ret) { task_unlock(current); |
58568d2a8 cpuset,mm: update... |
772 |
mpol_put(new); |
4bfc44958 mm: make set_memp... |
773 |
goto out; |
58568d2a8 cpuset,mm: update... |
774 775 |
} old = current->mempolicy; |
1da177e4c Linux-2.6.12-rc2 |
776 |
current->mempolicy = new; |
45816682b mm, mempolicy: st... |
777 778 |
if (new && new->mode == MPOL_INTERLEAVE) current->il_prev = MAX_NUMNODES-1; |
58568d2a8 cpuset,mm: update... |
779 |
task_unlock(current); |
58568d2a8 cpuset,mm: update... |
780 |
mpol_put(old); |
4bfc44958 mm: make set_memp... |
781 782 783 784 |
ret = 0; out: NODEMASK_SCRATCH_FREE(scratch); return ret; |
1da177e4c Linux-2.6.12-rc2 |
785 |
} |
bea904d54 mempolicy: use MP... |
786 787 |
/* * Return nodemask for policy for get_mempolicy() query |
58568d2a8 cpuset,mm: update... |
788 789 |
* * Called with task's alloc_lock held |
bea904d54 mempolicy: use MP... |
790 791 |
*/ static void get_policy_nodemask(struct mempolicy *p, nodemask_t *nodes) |
1da177e4c Linux-2.6.12-rc2 |
792 |
{ |
dfcd3c0dc [PATCH] Convert m... |
793 |
nodes_clear(*nodes); |
bea904d54 mempolicy: use MP... |
794 795 |
if (p == &default_policy) return; |
45c4745af mempolicy: rename... |
796 |
switch (p->mode) { |
19770b326 mm: filter based ... |
797 798 |
case MPOL_BIND: /* Fall through */ |
1da177e4c Linux-2.6.12-rc2 |
799 |
case MPOL_INTERLEAVE: |
dfcd3c0dc [PATCH] Convert m... |
800 |
*nodes = p->v.nodes; |
1da177e4c Linux-2.6.12-rc2 |
801 802 |
break; case MPOL_PREFERRED: |
fc36b8d3d mempolicy: use MP... |
803 |
if (!(p->flags & MPOL_F_LOCAL)) |
dfcd3c0dc [PATCH] Convert m... |
804 |
node_set(p->v.preferred_node, *nodes); |
53f2556b6 mempolicy: mPOL_P... |
805 |
/* else return empty node mask for local allocation */ |
1da177e4c Linux-2.6.12-rc2 |
806 807 808 809 810 |
break; default: BUG(); } } |
3b9aadf72 userfaultfd: allo... |
811 |
static int lookup_node(struct mm_struct *mm, unsigned long addr) |
1da177e4c Linux-2.6.12-rc2 |
812 813 814 |
{ struct page *p; int err; |
3b9aadf72 userfaultfd: allo... |
815 816 |
int locked = 1; err = get_user_pages_locked(addr & PAGE_MASK, 1, 0, &p, &locked); |
1da177e4c Linux-2.6.12-rc2 |
817 818 819 820 |
if (err >= 0) { err = page_to_nid(p); put_page(p); } |
3b9aadf72 userfaultfd: allo... |
821 822 |
if (locked) up_read(&mm->mmap_sem); |
1da177e4c Linux-2.6.12-rc2 |
823 824 |
return err; } |
1da177e4c Linux-2.6.12-rc2 |
825 |
/* Retrieve NUMA policy */ |
dbcb0f19c mm/mempolicy.c: c... |
826 827 |
static long do_get_mempolicy(int *policy, nodemask_t *nmask, unsigned long addr, unsigned long flags) |
1da177e4c Linux-2.6.12-rc2 |
828 |
{ |
8bccd85ff [PATCH] Implement... |
829 |
int err; |
1da177e4c Linux-2.6.12-rc2 |
830 831 |
struct mm_struct *mm = current->mm; struct vm_area_struct *vma = NULL; |
3b9aadf72 userfaultfd: allo... |
832 |
struct mempolicy *pol = current->mempolicy, *pol_refcount = NULL; |
1da177e4c Linux-2.6.12-rc2 |
833 |
|
754af6f5a Mem Policy: add M... |
834 835 |
if (flags & ~(unsigned long)(MPOL_F_NODE|MPOL_F_ADDR|MPOL_F_MEMS_ALLOWED)) |
1da177e4c Linux-2.6.12-rc2 |
836 |
return -EINVAL; |
754af6f5a Mem Policy: add M... |
837 838 839 840 841 |
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... |
842 |
task_lock(current); |
754af6f5a Mem Policy: add M... |
843 |
*nmask = cpuset_current_mems_allowed; |
58568d2a8 cpuset,mm: update... |
844 |
task_unlock(current); |
754af6f5a Mem Policy: add M... |
845 846 |
return 0; } |
1da177e4c Linux-2.6.12-rc2 |
847 |
if (flags & MPOL_F_ADDR) { |
bea904d54 mempolicy: use MP... |
848 849 850 851 852 |
/* * 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. */ |
1da177e4c Linux-2.6.12-rc2 |
853 854 855 856 857 858 859 860 861 862 863 864 865 866 |
down_read(&mm->mmap_sem); vma = find_vma_intersection(mm, addr, addr+1); if (!vma) { up_read(&mm->mmap_sem); 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... |
867 |
pol = &default_policy; /* indicates default behavior */ |
1da177e4c Linux-2.6.12-rc2 |
868 869 870 |
if (flags & MPOL_F_NODE) { if (flags & MPOL_F_ADDR) { |
3b9aadf72 userfaultfd: allo... |
871 872 873 874 875 876 877 878 879 880 |
/* * Take a refcount on the mpol, lookup_node() * wil drop the mmap_sem, so after calling * 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 |
881 882 |
if (err < 0) goto out; |
8bccd85ff [PATCH] Implement... |
883 |
*policy = err; |
1da177e4c Linux-2.6.12-rc2 |
884 |
} else if (pol == current->mempolicy && |
45c4745af mempolicy: rename... |
885 |
pol->mode == MPOL_INTERLEAVE) { |
45816682b mm, mempolicy: st... |
886 |
*policy = next_node_in(current->il_prev, pol->v.nodes); |
1da177e4c Linux-2.6.12-rc2 |
887 888 889 890 |
} else { err = -EINVAL; goto out; } |
bea904d54 mempolicy: use MP... |
891 892 893 |
} else { *policy = pol == &default_policy ? MPOL_DEFAULT : pol->mode; |
d79df630f mempolicy: mask o... |
894 895 896 897 898 |
/* * Internal mempolicy flags must be masked off before exposing * the policy to userspace. */ *policy |= (pol->flags & MPOL_MODE_FLAGS); |
bea904d54 mempolicy: use MP... |
899 |
} |
1da177e4c Linux-2.6.12-rc2 |
900 |
|
1da177e4c Linux-2.6.12-rc2 |
901 |
err = 0; |
58568d2a8 cpuset,mm: update... |
902 |
if (nmask) { |
c6b6ef8bb mempolicy: fix ge... |
903 904 905 906 907 908 909 |
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... |
910 |
} |
1da177e4c Linux-2.6.12-rc2 |
911 912 |
out: |
52cd3b074 mempolicy: rework... |
913 |
mpol_cond_put(pol); |
1da177e4c Linux-2.6.12-rc2 |
914 |
if (vma) |
3b9aadf72 userfaultfd: allo... |
915 916 917 |
up_read(&mm->mmap_sem); if (pol_refcount) mpol_put(pol_refcount); |
1da177e4c Linux-2.6.12-rc2 |
918 919 |
return err; } |
b20a35035 [PATCH] page migr... |
920 |
#ifdef CONFIG_MIGRATION |
8bccd85ff [PATCH] Implement... |
921 |
/* |
c86337984 mm: mempolicy: mb... |
922 |
* page migration, thp tail pages can be passed. |
6ce3c4c0f [PATCH] Move page... |
923 |
*/ |
a53190a4a mm: mempolicy: ha... |
924 |
static int migrate_page_add(struct page *page, struct list_head *pagelist, |
fc3012896 [PATCH] Simplify ... |
925 |
unsigned long flags) |
6ce3c4c0f [PATCH] Move page... |
926 |
{ |
c86337984 mm: mempolicy: mb... |
927 |
struct page *head = compound_head(page); |
6ce3c4c0f [PATCH] Move page... |
928 |
/* |
fc3012896 [PATCH] Simplify ... |
929 |
* Avoid migrating a page that is shared with others. |
6ce3c4c0f [PATCH] Move page... |
930 |
*/ |
c86337984 mm: mempolicy: mb... |
931 932 933 934 935 936 |
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), NR_ISOLATED_ANON + page_is_file_cache(head), hpage_nr_pages(head)); |
a53190a4a mm: mempolicy: ha... |
937 938 939 940 941 942 943 944 945 |
} 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... |
946 947 |
} } |
a53190a4a mm: mempolicy: ha... |
948 949 |
return 0; |
7e2ab150d [PATCH] Direct Mi... |
950 |
} |
6ce3c4c0f [PATCH] Move page... |
951 |
|
a49bd4d71 mm, numa: rework ... |
952 |
/* page allocation callback for NUMA node migration */ |
666feb21a mm, migrate: remo... |
953 |
struct page *alloc_new_node_page(struct page *page, unsigned long node) |
95a402c38 [PATCH] page migr... |
954 |
{ |
e2d8cf405 migrate: add huge... |
955 956 957 |
if (PageHuge(page)) return alloc_huge_page_node(page_hstate(compound_head(page)), node); |
94723aafb mm: unclutter THP... |
958 |
else if (PageTransHuge(page)) { |
c86337984 mm: mempolicy: mb... |
959 960 961 962 963 964 965 966 967 968 |
struct page *thp; thp = alloc_pages_node(node, (GFP_TRANSHUGE | __GFP_THISNODE), HPAGE_PMD_ORDER); if (!thp) return NULL; prep_transhuge_page(thp); return thp; } else |
96db800f5 mm: rename alloc_... |
969 |
return __alloc_pages_node(node, GFP_HIGHUSER_MOVABLE | |
b360edb43 mm, mempolicy: mi... |
970 |
__GFP_THISNODE, 0); |
95a402c38 [PATCH] page migr... |
971 |
} |
7e2ab150d [PATCH] Direct Mi... |
972 973 974 975 |
/* * Migrate pages from one node to a target node. * Returns error or the number of pages not migrated. */ |
dbcb0f19c mm/mempolicy.c: c... |
976 977 |
static int migrate_to_node(struct mm_struct *mm, int source, int dest, int flags) |
7e2ab150d [PATCH] Direct Mi... |
978 979 980 981 982 983 984 |
{ nodemask_t nmask; LIST_HEAD(pagelist); int err = 0; nodes_clear(nmask); node_set(source, nmask); |
6ce3c4c0f [PATCH] Move page... |
985 |
|
082708072 mm: revert 0def08... |
986 987 988 989 990 991 |
/* * 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... |
992 |
queue_pages_range(mm, mm->mmap->vm_start, mm->task_size, &nmask, |
7e2ab150d [PATCH] Direct Mi... |
993 |
flags | MPOL_MF_DISCONTIG_OK, &pagelist); |
cf608ac19 mm: compaction: f... |
994 |
if (!list_empty(&pagelist)) { |
a49bd4d71 mm, numa: rework ... |
995 |
err = migrate_pages(&pagelist, alloc_new_node_page, NULL, dest, |
9c620e2bc mm: remove offlin... |
996 |
MIGRATE_SYNC, MR_SYSCALL); |
cf608ac19 mm: compaction: f... |
997 |
if (err) |
e2d8cf405 migrate: add huge... |
998 |
putback_movable_pages(&pagelist); |
cf608ac19 mm: compaction: f... |
999 |
} |
95a402c38 [PATCH] page migr... |
1000 |
|
7e2ab150d [PATCH] Direct Mi... |
1001 |
return err; |
6ce3c4c0f [PATCH] Move page... |
1002 1003 1004 |
} /* |
7e2ab150d [PATCH] Direct Mi... |
1005 1006 |
* Move pages between the two nodesets so as to preserve the physical * layout as much as possible. |
39743889a [PATCH] Swap Migr... |
1007 1008 1009 |
* * Returns the number of page that could not be moved. */ |
0ce72d4f7 mm: do_migrate_pa... |
1010 1011 |
int do_migrate_pages(struct mm_struct *mm, const nodemask_t *from, const nodemask_t *to, int flags) |
39743889a [PATCH] Swap Migr... |
1012 |
{ |
7e2ab150d [PATCH] Direct Mi... |
1013 |
int busy = 0; |
0aedadf91 mm: move migrate_... |
1014 |
int err; |
7e2ab150d [PATCH] Direct Mi... |
1015 |
nodemask_t tmp; |
39743889a [PATCH] Swap Migr... |
1016 |
|
0aedadf91 mm: move migrate_... |
1017 1018 1019 |
err = migrate_prep(); if (err) return err; |
53f2556b6 mempolicy: mPOL_P... |
1020 |
down_read(&mm->mmap_sem); |
39743889a [PATCH] Swap Migr... |
1021 |
|
da0aa1389 mm/mempolicy.c: f... |
1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 |
/* * 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... |
1047 |
* Otherwise when we finish scanning from_tmp, we at least have the |
da0aa1389 mm/mempolicy.c: f... |
1048 1049 1050 1051 |
* 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: ... |
1052 |
|
0ce72d4f7 mm: do_migrate_pa... |
1053 |
tmp = *from; |
7e2ab150d [PATCH] Direct Mi... |
1054 1055 |
while (!nodes_empty(tmp)) { int s,d; |
b76ac7e73 mm/mempolicy: use... |
1056 |
int source = NUMA_NO_NODE; |
7e2ab150d [PATCH] Direct Mi... |
1057 1058 1059 |
int dest = 0; for_each_node_mask(s, tmp) { |
4a5b18cc1 mm: do_migrate_pa... |
1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 |
/* * 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... |
1075 1076 |
if ((nodes_weight(*from) != nodes_weight(*to)) && (node_isset(s, *to))) |
4a5b18cc1 mm: do_migrate_pa... |
1077 |
continue; |
0ce72d4f7 mm: do_migrate_pa... |
1078 |
d = node_remap(s, *from, *to); |
7e2ab150d [PATCH] Direct Mi... |
1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 |
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... |
1089 |
if (source == NUMA_NO_NODE) |
7e2ab150d [PATCH] Direct Mi... |
1090 1091 1092 1093 1094 1095 1096 1097 |
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... |
1098 1099 |
} up_read(&mm->mmap_sem); |
7e2ab150d [PATCH] Direct Mi... |
1100 1101 1102 |
if (err < 0) return err; return busy; |
b20a35035 [PATCH] page migr... |
1103 1104 |
} |
3ad33b243 Migration: find c... |
1105 1106 |
/* * Allocate a new page for page migration based on vma policy. |
d05f0cdcb mm: fix crashes f... |
1107 |
* Start by assuming the page is mapped by the same vma as contains @start. |
3ad33b243 Migration: find c... |
1108 1109 1110 1111 |
* 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... |
1112 |
static struct page *new_page(struct page *page, unsigned long start) |
95a402c38 [PATCH] page migr... |
1113 |
{ |
d05f0cdcb mm: fix crashes f... |
1114 |
struct vm_area_struct *vma; |
3ad33b243 Migration: find c... |
1115 |
unsigned long uninitialized_var(address); |
95a402c38 [PATCH] page migr... |
1116 |
|
d05f0cdcb mm: fix crashes f... |
1117 |
vma = find_vma(current->mm, start); |
3ad33b243 Migration: find c... |
1118 1119 1120 1121 1122 1123 |
while (vma) { address = page_address_in_vma(page, vma); if (address != -EFAULT) break; vma = vma->vm_next; } |
11c731e81 mm/mempolicy: fix... |
1124 1125 |
if (PageHuge(page)) { |
389c8178d hugetlb, mbind: f... |
1126 1127 |
return alloc_huge_page_vma(page_hstate(compound_head(page)), vma, address); |
94723aafb mm: unclutter THP... |
1128 |
} else if (PageTransHuge(page)) { |
c86337984 mm: mempolicy: mb... |
1129 |
struct page *thp; |
19deb7695 Revert "Revert "R... |
1130 1131 |
thp = alloc_hugepage_vma(GFP_TRANSHUGE, vma, address, HPAGE_PMD_ORDER); |
c86337984 mm: mempolicy: mb... |
1132 1133 1134 1135 |
if (!thp) return NULL; prep_transhuge_page(thp); return thp; |
11c731e81 mm/mempolicy: fix... |
1136 |
} |
0bf598d86 mbind: add BUG_ON... |
1137 |
/* |
11c731e81 mm/mempolicy: fix... |
1138 |
* if !vma, alloc_page_vma() will use task or system default policy |
0bf598d86 mbind: add BUG_ON... |
1139 |
*/ |
0f5568562 mm, migration: do... |
1140 1141 |
return alloc_page_vma(GFP_HIGHUSER_MOVABLE | __GFP_RETRY_MAYFAIL, vma, address); |
95a402c38 [PATCH] page migr... |
1142 |
} |
b20a35035 [PATCH] page migr... |
1143 |
#else |
a53190a4a mm: mempolicy: ha... |
1144 |
static int migrate_page_add(struct page *page, struct list_head *pagelist, |
b20a35035 [PATCH] page migr... |
1145 1146 |
unsigned long flags) { |
a53190a4a mm: mempolicy: ha... |
1147 |
return -EIO; |
39743889a [PATCH] Swap Migr... |
1148 |
} |
0ce72d4f7 mm: do_migrate_pa... |
1149 1150 |
int do_migrate_pages(struct mm_struct *mm, const nodemask_t *from, const nodemask_t *to, int flags) |
b20a35035 [PATCH] page migr... |
1151 1152 1153 |
{ return -ENOSYS; } |
95a402c38 [PATCH] page migr... |
1154 |
|
666feb21a mm, migrate: remo... |
1155 |
static struct page *new_page(struct page *page, unsigned long start) |
95a402c38 [PATCH] page migr... |
1156 1157 1158 |
{ return NULL; } |
b20a35035 [PATCH] page migr... |
1159 |
#endif |
dbcb0f19c mm/mempolicy.c: c... |
1160 |
static long do_mbind(unsigned long start, unsigned long len, |
028fec414 mempolicy: suppor... |
1161 1162 |
unsigned short mode, unsigned short mode_flags, nodemask_t *nmask, unsigned long flags) |
6ce3c4c0f [PATCH] Move page... |
1163 |
{ |
6ce3c4c0f [PATCH] Move page... |
1164 1165 1166 1167 |
struct mm_struct *mm = current->mm; struct mempolicy *new; unsigned long end; int err; |
d88354451 mm: mempolicy: ma... |
1168 |
int ret; |
6ce3c4c0f [PATCH] Move page... |
1169 |
LIST_HEAD(pagelist); |
b24f53a0b mm: mempolicy: Ad... |
1170 |
if (flags & ~(unsigned long)MPOL_MF_VALID) |
6ce3c4c0f [PATCH] Move page... |
1171 |
return -EINVAL; |
74c002410 [PATCH] Consisten... |
1172 |
if ((flags & MPOL_MF_MOVE_ALL) && !capable(CAP_SYS_NICE)) |
6ce3c4c0f [PATCH] Move page... |
1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 |
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... |
1188 |
new = mpol_new(mode, mode_flags, nmask); |
6ce3c4c0f [PATCH] Move page... |
1189 1190 |
if (IS_ERR(new)) return PTR_ERR(new); |
b24f53a0b mm: mempolicy: Ad... |
1191 1192 |
if (flags & MPOL_MF_LAZY) new->flags |= MPOL_F_MOF; |
6ce3c4c0f [PATCH] Move page... |
1193 1194 1195 1196 1197 1198 |
/* * 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... |
1199 1200 1201 |
pr_debug("mbind %lx-%lx mode:%d flags:%d nodes:%lx ", start, start + len, mode, mode_flags, |
00ef2d2f8 mm: use NUMA_NO_NODE |
1202 |
nmask ? nodes_addr(*nmask)[0] : NUMA_NO_NODE); |
6ce3c4c0f [PATCH] Move page... |
1203 |
|
0aedadf91 mm: move migrate_... |
1204 1205 1206 1207 |
if (flags & (MPOL_MF_MOVE | MPOL_MF_MOVE_ALL)) { err = migrate_prep(); if (err) |
b05ca7385 do_mbind(): fix m... |
1208 |
goto mpol_out; |
0aedadf91 mm: move migrate_... |
1209 |
} |
4bfc44958 mm: make set_memp... |
1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 |
{ NODEMASK_SCRATCH(scratch); if (scratch) { down_write(&mm->mmap_sem); task_lock(current); err = mpol_set_nodemask(new, nmask, scratch); task_unlock(current); if (err) up_write(&mm->mmap_sem); } else err = -ENOMEM; NODEMASK_SCRATCH_FREE(scratch); } |
b05ca7385 do_mbind(): fix m... |
1223 1224 |
if (err) goto mpol_out; |
d88354451 mm: mempolicy: ma... |
1225 |
ret = queue_pages_range(mm, start, end, nmask, |
6ce3c4c0f [PATCH] Move page... |
1226 |
flags | MPOL_MF_INVERT, &pagelist); |
d88354451 mm: mempolicy: ma... |
1227 1228 |
if (ret < 0) { |
a85dfc305 mm: mempolicy: fi... |
1229 |
err = ret; |
d88354451 mm: mempolicy: ma... |
1230 1231 1232 1233 |
goto up_out; } err = mbind_range(mm, start, end, new); |
7e2ab150d [PATCH] Direct Mi... |
1234 |
|
b24f53a0b mm: mempolicy: Ad... |
1235 1236 |
if (!err) { int nr_failed = 0; |
cf608ac19 mm: compaction: f... |
1237 |
if (!list_empty(&pagelist)) { |
b24f53a0b mm: mempolicy: Ad... |
1238 |
WARN_ON_ONCE(flags & MPOL_MF_LAZY); |
d05f0cdcb mm: fix crashes f... |
1239 1240 |
nr_failed = migrate_pages(&pagelist, new_page, NULL, start, MIGRATE_SYNC, MR_MEMPOLICY_MBIND); |
cf608ac19 mm: compaction: f... |
1241 |
if (nr_failed) |
74060e4d7 mm: mbind: add hu... |
1242 |
putback_movable_pages(&pagelist); |
cf608ac19 mm: compaction: f... |
1243 |
} |
6ce3c4c0f [PATCH] Move page... |
1244 |
|
d88354451 mm: mempolicy: ma... |
1245 |
if ((ret > 0) || (nr_failed && (flags & MPOL_MF_STRICT))) |
6ce3c4c0f [PATCH] Move page... |
1246 |
err = -EIO; |
a85dfc305 mm: mempolicy: fi... |
1247 |
} else { |
d88354451 mm: mempolicy: ma... |
1248 |
up_out: |
a85dfc305 mm: mempolicy: fi... |
1249 1250 1251 |
if (!list_empty(&pagelist)) putback_movable_pages(&pagelist); } |
6ce3c4c0f [PATCH] Move page... |
1252 |
up_write(&mm->mmap_sem); |
d88354451 mm: mempolicy: ma... |
1253 |
mpol_out: |
f0be3d32b mempolicy: rename... |
1254 |
mpol_put(new); |
6ce3c4c0f [PATCH] Move page... |
1255 1256 |
return err; } |
39743889a [PATCH] Swap Migr... |
1257 |
/* |
8bccd85ff [PATCH] Implement... |
1258 1259 1260 1261 |
* User space interface with variable sized bitmaps for nodelists. */ /* Copy a node mask from user space. */ |
39743889a [PATCH] Swap Migr... |
1262 |
static int get_nodes(nodemask_t *nodes, const unsigned long __user *nmask, |
8bccd85ff [PATCH] Implement... |
1263 1264 1265 |
unsigned long maxnode) { unsigned long k; |
56521e7a0 mm/mempolicy: fix... |
1266 |
unsigned long t; |
8bccd85ff [PATCH] Implement... |
1267 1268 1269 1270 1271 1272 1273 |
unsigned long nlongs; unsigned long endmask; --maxnode; nodes_clear(*nodes); if (maxnode == 0 || !nmask) return 0; |
a9c930bac [PATCH] Fix units... |
1274 |
if (maxnode > PAGE_SIZE*BITS_PER_BYTE) |
636f13c17 [PATCH] sys_mbind... |
1275 |
return -EINVAL; |
8bccd85ff [PATCH] Implement... |
1276 1277 1278 1279 1280 1281 |
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... |
1282 1283 1284 1285 1286 1287 1288 1289 1290 |
/* * 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... |
1291 |
if (nlongs > BITS_TO_LONGS(MAX_NUMNODES)) { |
8bccd85ff [PATCH] Implement... |
1292 |
for (k = BITS_TO_LONGS(MAX_NUMNODES); k < nlongs; k++) { |
8bccd85ff [PATCH] Implement... |
1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 |
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... |
1304 1305 1306 1307 1308 1309 1310 1311 1312 |
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... |
1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 |
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_... |
1324 |
unsigned int nbytes = BITS_TO_LONGS(nr_node_ids) * sizeof(long); |
8bccd85ff [PATCH] Implement... |
1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 |
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... |
1335 1336 1337 |
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... |
1338 1339 1340 |
{ nodemask_t nodes; int err; |
028fec414 mempolicy: suppor... |
1341 |
unsigned short mode_flags; |
8bccd85ff [PATCH] Implement... |
1342 |
|
057d33891 mm: untag user po... |
1343 |
start = untagged_addr(start); |
028fec414 mempolicy: suppor... |
1344 1345 |
mode_flags = mode & MPOL_MODE_FLAGS; mode &= ~MPOL_MODE_FLAGS; |
a3b51e014 mempolicy: conver... |
1346 1347 |
if (mode >= MPOL_MAX) return -EINVAL; |
4c50bc011 mempolicy: add MP... |
1348 1349 1350 |
if ((mode_flags & MPOL_F_STATIC_NODES) && (mode_flags & MPOL_F_RELATIVE_NODES)) return -EINVAL; |
8bccd85ff [PATCH] Implement... |
1351 1352 1353 |
err = get_nodes(&nodes, nmask, maxnode); if (err) return err; |
028fec414 mempolicy: suppor... |
1354 |
return do_mbind(start, len, mode, mode_flags, &nodes, flags); |
8bccd85ff [PATCH] Implement... |
1355 |
} |
e7dc9ad6e mm: add kernel_mb... |
1356 1357 1358 1359 1360 1361 |
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... |
1362 |
/* Set the process memory policy */ |
af03c4acb mm: add kernel_[s... |
1363 1364 |
static long kernel_set_mempolicy(int mode, const unsigned long __user *nmask, unsigned long maxnode) |
8bccd85ff [PATCH] Implement... |
1365 1366 1367 |
{ int err; nodemask_t nodes; |
028fec414 mempolicy: suppor... |
1368 |
unsigned short flags; |
8bccd85ff [PATCH] Implement... |
1369 |
|
028fec414 mempolicy: suppor... |
1370 1371 1372 |
flags = mode & MPOL_MODE_FLAGS; mode &= ~MPOL_MODE_FLAGS; if ((unsigned int)mode >= MPOL_MAX) |
8bccd85ff [PATCH] Implement... |
1373 |
return -EINVAL; |
4c50bc011 mempolicy: add MP... |
1374 1375 |
if ((flags & MPOL_F_STATIC_NODES) && (flags & MPOL_F_RELATIVE_NODES)) return -EINVAL; |
8bccd85ff [PATCH] Implement... |
1376 1377 1378 |
err = get_nodes(&nodes, nmask, maxnode); if (err) return err; |
028fec414 mempolicy: suppor... |
1379 |
return do_set_mempolicy(mode, flags, &nodes); |
8bccd85ff [PATCH] Implement... |
1380 |
} |
af03c4acb mm: add kernel_[s... |
1381 1382 1383 1384 1385 |
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... |
1386 1387 1388 |
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... |
1389 |
{ |
596d7cfa2 mempolicy: reduce... |
1390 |
struct mm_struct *mm = NULL; |
39743889a [PATCH] Swap Migr... |
1391 |
struct task_struct *task; |
39743889a [PATCH] Swap Migr... |
1392 1393 |
nodemask_t task_nodes; int err; |
596d7cfa2 mempolicy: reduce... |
1394 1395 1396 1397 1398 1399 |
nodemask_t *old; nodemask_t *new; NODEMASK_SCRATCH(scratch); if (!scratch) return -ENOMEM; |
39743889a [PATCH] Swap Migr... |
1400 |
|
596d7cfa2 mempolicy: reduce... |
1401 1402 1403 1404 |
old = &scratch->mask1; new = &scratch->mask2; err = get_nodes(old, old_nodes, maxnode); |
39743889a [PATCH] Swap Migr... |
1405 |
if (err) |
596d7cfa2 mempolicy: reduce... |
1406 |
goto out; |
39743889a [PATCH] Swap Migr... |
1407 |
|
596d7cfa2 mempolicy: reduce... |
1408 |
err = get_nodes(new, new_nodes, maxnode); |
39743889a [PATCH] Swap Migr... |
1409 |
if (err) |
596d7cfa2 mempolicy: reduce... |
1410 |
goto out; |
39743889a [PATCH] Swap Migr... |
1411 1412 |
/* Find the mm_struct */ |
55cfaa3cb mm/mempolicy.c: a... |
1413 |
rcu_read_lock(); |
228ebcbe6 Uninline find_tas... |
1414 |
task = pid ? find_task_by_vpid(pid) : current; |
39743889a [PATCH] Swap Migr... |
1415 |
if (!task) { |
55cfaa3cb mm/mempolicy.c: a... |
1416 |
rcu_read_unlock(); |
596d7cfa2 mempolicy: reduce... |
1417 1418 |
err = -ESRCH; goto out; |
39743889a [PATCH] Swap Migr... |
1419 |
} |
3268c63ed mm: fix move/migr... |
1420 |
get_task_struct(task); |
39743889a [PATCH] Swap Migr... |
1421 |
|
596d7cfa2 mempolicy: reduce... |
1422 |
err = -EINVAL; |
39743889a [PATCH] Swap Migr... |
1423 1424 |
/* |
313674661 Unify migrate_pag... |
1425 1426 |
* Check if this process has the right to modify the specified process. * Use the regular "ptrace_may_access()" checks. |
39743889a [PATCH] Swap Migr... |
1427 |
*/ |
313674661 Unify migrate_pag... |
1428 |
if (!ptrace_may_access(task, PTRACE_MODE_READ_REALCREDS)) { |
c69e8d9c0 CRED: Use RCU to ... |
1429 |
rcu_read_unlock(); |
39743889a [PATCH] Swap Migr... |
1430 |
err = -EPERM; |
3268c63ed mm: fix move/migr... |
1431 |
goto out_put; |
39743889a [PATCH] Swap Migr... |
1432 |
} |
c69e8d9c0 CRED: Use RCU to ... |
1433 |
rcu_read_unlock(); |
39743889a [PATCH] Swap Migr... |
1434 1435 1436 |
task_nodes = cpuset_mems_allowed(task); /* Is the user allowed to access the target nodes? */ |
596d7cfa2 mempolicy: reduce... |
1437 |
if (!nodes_subset(*new, task_nodes) && !capable(CAP_SYS_NICE)) { |
39743889a [PATCH] Swap Migr... |
1438 |
err = -EPERM; |
3268c63ed mm: fix move/migr... |
1439 |
goto out_put; |
39743889a [PATCH] Swap Migr... |
1440 |
} |
0486a38bc mm/mempolicy: add... |
1441 1442 1443 1444 |
task_nodes = cpuset_mems_allowed(current); nodes_and(*new, *new, task_nodes); if (nodes_empty(*new)) goto out_put; |
86c3a7645 [PATCH] SELinux: ... |
1445 1446 |
err = security_task_movememory(task); if (err) |
3268c63ed mm: fix move/migr... |
1447 |
goto out_put; |
86c3a7645 [PATCH] SELinux: ... |
1448 |
|
3268c63ed mm: fix move/migr... |
1449 1450 |
mm = get_task_mm(task); put_task_struct(task); |
f2a9ef880 mm: fix NULL ptr ... |
1451 1452 |
if (!mm) { |
3268c63ed mm: fix move/migr... |
1453 |
err = -EINVAL; |
f2a9ef880 mm: fix NULL ptr ... |
1454 1455 1456 1457 1458 |
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... |
1459 1460 1461 |
mmput(mm); out: |
596d7cfa2 mempolicy: reduce... |
1462 |
NODEMASK_SCRATCH_FREE(scratch); |
39743889a [PATCH] Swap Migr... |
1463 |
return err; |
3268c63ed mm: fix move/migr... |
1464 1465 1466 1467 |
out_put: put_task_struct(task); goto out; |
39743889a [PATCH] Swap Migr... |
1468 |
} |
b6e9b0bab mm: add kernel_mi... |
1469 1470 1471 1472 1473 1474 |
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... |
1475 |
|
8bccd85ff [PATCH] Implement... |
1476 |
/* Retrieve NUMA policy */ |
af03c4acb mm: add kernel_[s... |
1477 1478 1479 1480 1481 |
static int kernel_get_mempolicy(int __user *policy, unsigned long __user *nmask, unsigned long maxnode, unsigned long addr, unsigned long flags) |
8bccd85ff [PATCH] Implement... |
1482 |
{ |
dbcb0f19c mm/mempolicy.c: c... |
1483 1484 |
int err; int uninitialized_var(pval); |
8bccd85ff [PATCH] Implement... |
1485 |
nodemask_t nodes; |
057d33891 mm: untag user po... |
1486 |
addr = untagged_addr(addr); |
050c17f23 numa: change get_... |
1487 |
if (nmask != NULL && maxnode < nr_node_ids) |
8bccd85ff [PATCH] Implement... |
1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 |
return -EINVAL; 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... |
1503 1504 1505 1506 1507 1508 |
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 |
1509 |
#ifdef CONFIG_COMPAT |
c93e0f6c8 mm/compat: conver... |
1510 1511 1512 1513 |
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 |
1514 1515 1516 1517 1518 |
{ long err; unsigned long __user *nm = NULL; unsigned long nr_bits, alloc_size; DECLARE_BITMAP(bm, MAX_NUMNODES); |
050c17f23 numa: change get_... |
1519 |
nr_bits = min_t(unsigned long, maxnode-1, nr_node_ids); |
1da177e4c Linux-2.6.12-rc2 |
1520 1521 1522 1523 |
alloc_size = ALIGN(nr_bits, BITS_PER_LONG) / 8; if (nmask) nm = compat_alloc_user_space(alloc_size); |
af03c4acb mm: add kernel_[s... |
1524 |
err = kernel_get_mempolicy(policy, nm, nr_bits+1, addr, flags); |
1da177e4c Linux-2.6.12-rc2 |
1525 1526 |
if (!err && nmask) { |
2bbff6c76 mm/mempolicy.c: m... |
1527 1528 1529 |
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 |
1530 1531 1532 1533 1534 1535 1536 |
/* 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... |
1537 1538 |
COMPAT_SYSCALL_DEFINE3(set_mempolicy, int, mode, compat_ulong_t __user *, nmask, compat_ulong_t, maxnode) |
1da177e4c Linux-2.6.12-rc2 |
1539 |
{ |
1da177e4c Linux-2.6.12-rc2 |
1540 1541 1542 1543 1544 1545 1546 1547 |
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... |
1548 1549 |
if (compat_get_bitmap(bm, nmask, nr_bits)) return -EFAULT; |
1da177e4c Linux-2.6.12-rc2 |
1550 |
nm = compat_alloc_user_space(alloc_size); |
cf01fb998 mm/mempolicy.c: f... |
1551 1552 |
if (copy_to_user(nm, bm, alloc_size)) return -EFAULT; |
1da177e4c Linux-2.6.12-rc2 |
1553 |
} |
af03c4acb mm: add kernel_[s... |
1554 |
return kernel_set_mempolicy(mode, nm, nr_bits+1); |
1da177e4c Linux-2.6.12-rc2 |
1555 |
} |
c93e0f6c8 mm/compat: conver... |
1556 1557 1558 |
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 |
1559 |
{ |
1da177e4c Linux-2.6.12-rc2 |
1560 1561 |
unsigned long __user *nm = NULL; unsigned long nr_bits, alloc_size; |
dfcd3c0dc [PATCH] Convert m... |
1562 |
nodemask_t bm; |
1da177e4c Linux-2.6.12-rc2 |
1563 1564 1565 1566 1567 |
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... |
1568 1569 |
if (compat_get_bitmap(nodes_addr(bm), nmask, nr_bits)) return -EFAULT; |
1da177e4c Linux-2.6.12-rc2 |
1570 |
nm = compat_alloc_user_space(alloc_size); |
cf01fb998 mm/mempolicy.c: f... |
1571 1572 |
if (copy_to_user(nm, nodes_addr(bm), alloc_size)) return -EFAULT; |
1da177e4c Linux-2.6.12-rc2 |
1573 |
} |
e7dc9ad6e mm: add kernel_mb... |
1574 |
return kernel_mbind(start, len, mode, nm, nr_bits+1, flags); |
1da177e4c Linux-2.6.12-rc2 |
1575 |
} |
b6e9b0bab mm: add kernel_mi... |
1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 |
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 |
1610 |
|
74d2c3a05 mempolicy: introd... |
1611 1612 |
struct mempolicy *__get_vma_policy(struct vm_area_struct *vma, unsigned long addr) |
1da177e4c Linux-2.6.12-rc2 |
1613 |
{ |
8d90274b3 mempolicy: saniti... |
1614 |
struct mempolicy *pol = NULL; |
1da177e4c Linux-2.6.12-rc2 |
1615 1616 |
if (vma) { |
480eccf9a Fix NUMA Memory P... |
1617 |
if (vma->vm_ops && vma->vm_ops->get_policy) { |
8d90274b3 mempolicy: saniti... |
1618 |
pol = vma->vm_ops->get_policy(vma, addr); |
00442ad04 mempolicy: fix a ... |
1619 |
} else if (vma->vm_policy) { |
1da177e4c Linux-2.6.12-rc2 |
1620 |
pol = vma->vm_policy; |
00442ad04 mempolicy: fix a ... |
1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 |
/* * 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 |
1631 |
} |
f15ca78e3 mempolicy: change... |
1632 |
|
74d2c3a05 mempolicy: introd... |
1633 1634 1635 1636 |
return pol; } /* |
dd6eecb91 mempolicy: unexpo... |
1637 |
* get_vma_policy(@vma, @addr) |
74d2c3a05 mempolicy: introd... |
1638 1639 1640 1641 |
* @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... |
1642 |
* Falls back to current->mempolicy or system default policy, as necessary. |
74d2c3a05 mempolicy: introd... |
1643 1644 1645 1646 1647 |
* 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... |
1648 |
static struct mempolicy *get_vma_policy(struct vm_area_struct *vma, |
dd6eecb91 mempolicy: unexpo... |
1649 |
unsigned long addr) |
74d2c3a05 mempolicy: introd... |
1650 1651 |
{ struct mempolicy *pol = __get_vma_policy(vma, addr); |
8d90274b3 mempolicy: saniti... |
1652 |
if (!pol) |
dd6eecb91 mempolicy: unexpo... |
1653 |
pol = get_task_policy(current); |
8d90274b3 mempolicy: saniti... |
1654 |
|
1da177e4c Linux-2.6.12-rc2 |
1655 1656 |
return pol; } |
6b6482bbf mempolicy: remove... |
1657 |
bool vma_policy_mof(struct vm_area_struct *vma) |
fc3147245 mm: numa: Limit N... |
1658 |
{ |
6b6482bbf mempolicy: remove... |
1659 |
struct mempolicy *pol; |
fc3147245 mm: numa: Limit N... |
1660 |
|
6b6482bbf mempolicy: remove... |
1661 1662 |
if (vma->vm_ops && vma->vm_ops->get_policy) { bool ret = false; |
fc3147245 mm: numa: Limit N... |
1663 |
|
6b6482bbf mempolicy: remove... |
1664 1665 1666 1667 |
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... |
1668 |
|
6b6482bbf mempolicy: remove... |
1669 |
return ret; |
fc3147245 mm: numa: Limit N... |
1670 |
} |
6b6482bbf mempolicy: remove... |
1671 |
pol = vma->vm_policy; |
8d90274b3 mempolicy: saniti... |
1672 |
if (!pol) |
6b6482bbf mempolicy: remove... |
1673 |
pol = get_task_policy(current); |
8d90274b3 mempolicy: saniti... |
1674 |
|
fc3147245 mm: numa: Limit N... |
1675 1676 |
return pol->flags & MPOL_F_MOF; } |
d3eb1570a mempolicy: fix is... |
1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 |
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... |
1696 1697 1698 1699 1700 |
/* * Return a nodemask representing a mempolicy for filtering nodes for * page allocation */ static nodemask_t *policy_nodemask(gfp_t gfp, struct mempolicy *policy) |
19770b326 mm: filter based ... |
1701 1702 |
{ /* Lower zones don't get a nodemask applied for MPOL_BIND */ |
45c4745af mempolicy: rename... |
1703 |
if (unlikely(policy->mode == MPOL_BIND) && |
d3eb1570a mempolicy: fix is... |
1704 |
apply_policy_zone(policy, gfp_zone(gfp)) && |
19770b326 mm: filter based ... |
1705 1706 1707 1708 1709 |
cpuset_nodemask_valid_mems_allowed(&policy->v.nodes)) return &policy->v.nodes; return NULL; } |
04ec6264f mm, page_alloc: p... |
1710 1711 1712 |
/* Return the node id preferred by the given mempolicy, or the given id */ static int policy_node(gfp_t gfp, struct mempolicy *policy, int nd) |
1da177e4c Linux-2.6.12-rc2 |
1713 |
{ |
6d8409580 mm, mempolicy: cl... |
1714 1715 1716 |
if (policy->mode == MPOL_PREFERRED && !(policy->flags & MPOL_F_LOCAL)) nd = policy->v.preferred_node; else { |
19770b326 mm: filter based ... |
1717 |
/* |
6d8409580 mm, mempolicy: cl... |
1718 1719 1720 |
* __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 ... |
1721 |
*/ |
6d8409580 mm, mempolicy: cl... |
1722 |
WARN_ON_ONCE(policy->mode == MPOL_BIND && (gfp & __GFP_THISNODE)); |
1da177e4c Linux-2.6.12-rc2 |
1723 |
} |
6d8409580 mm, mempolicy: cl... |
1724 |
|
04ec6264f mm, page_alloc: p... |
1725 |
return nd; |
1da177e4c Linux-2.6.12-rc2 |
1726 1727 1728 1729 1730 |
} /* Do dynamic interleaving for a process */ static unsigned interleave_nodes(struct mempolicy *policy) { |
45816682b mm, mempolicy: st... |
1731 |
unsigned next; |
1da177e4c Linux-2.6.12-rc2 |
1732 |
struct task_struct *me = current; |
45816682b mm, mempolicy: st... |
1733 |
next = next_node_in(me->il_prev, policy->v.nodes); |
f5b087b52 mempolicy: add MP... |
1734 |
if (next < MAX_NUMNODES) |
45816682b mm, mempolicy: st... |
1735 1736 |
me->il_prev = next; return next; |
1da177e4c Linux-2.6.12-rc2 |
1737 |
} |
dc85da15d [PATCH] NUMA poli... |
1738 1739 1740 1741 |
/* * Depending on the memory policy provide a node from which to allocate the * next slab entry. */ |
2a389610a mm, mempolicy: re... |
1742 |
unsigned int mempolicy_slab_node(void) |
dc85da15d [PATCH] NUMA poli... |
1743 |
{ |
e7b691b08 slab/mempolicy: a... |
1744 |
struct mempolicy *policy; |
2a389610a mm, mempolicy: re... |
1745 |
int node = numa_mem_id(); |
e7b691b08 slab/mempolicy: a... |
1746 1747 |
if (in_interrupt()) |
2a389610a mm, mempolicy: re... |
1748 |
return node; |
e7b691b08 slab/mempolicy: a... |
1749 1750 |
policy = current->mempolicy; |
fc36b8d3d mempolicy: use MP... |
1751 |
if (!policy || policy->flags & MPOL_F_LOCAL) |
2a389610a mm, mempolicy: re... |
1752 |
return node; |
bea904d54 mempolicy: use MP... |
1753 1754 1755 |
switch (policy->mode) { case MPOL_PREFERRED: |
fc36b8d3d mempolicy: use MP... |
1756 1757 1758 1759 |
/* * handled MPOL_F_LOCAL above */ return policy->v.preferred_node; |
765c4507a [PATCH] GFP_THISN... |
1760 |
|
dc85da15d [PATCH] NUMA poli... |
1761 1762 |
case MPOL_INTERLEAVE: return interleave_nodes(policy); |
dd1a239f6 mm: have zonelist... |
1763 |
case MPOL_BIND: { |
c33d6c06f mm, page_alloc: a... |
1764 |
struct zoneref *z; |
dc85da15d [PATCH] NUMA poli... |
1765 1766 1767 1768 |
/* * Follow bind policy behavior and start allocation at the * first node. */ |
19770b326 mm: filter based ... |
1769 |
struct zonelist *zonelist; |
19770b326 mm: filter based ... |
1770 |
enum zone_type highest_zoneidx = gfp_zone(GFP_KERNEL); |
c9634cf01 mm: use zonelist ... |
1771 |
zonelist = &NODE_DATA(node)->node_zonelists[ZONELIST_FALLBACK]; |
c33d6c06f mm, page_alloc: a... |
1772 1773 |
z = first_zones_zonelist(zonelist, highest_zoneidx, &policy->v.nodes); |
c1093b746 mm: access zone->... |
1774 |
return z->zone ? zone_to_nid(z->zone) : node; |
dd1a239f6 mm: have zonelist... |
1775 |
} |
dc85da15d [PATCH] NUMA poli... |
1776 |
|
dc85da15d [PATCH] NUMA poli... |
1777 |
default: |
bea904d54 mempolicy: use MP... |
1778 |
BUG(); |
dc85da15d [PATCH] NUMA poli... |
1779 1780 |
} } |
fee83b3ab mm/mempolicy.c:of... |
1781 1782 1783 1784 1785 |
/* * 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... |
1786 |
static unsigned offset_il_node(struct mempolicy *pol, unsigned long n) |
1da177e4c Linux-2.6.12-rc2 |
1787 |
{ |
dfcd3c0dc [PATCH] Convert m... |
1788 |
unsigned nnodes = nodes_weight(pol->v.nodes); |
f5b087b52 mempolicy: add MP... |
1789 |
unsigned target; |
fee83b3ab mm/mempolicy.c:of... |
1790 1791 |
int i; int nid; |
1da177e4c Linux-2.6.12-rc2 |
1792 |
|
f5b087b52 mempolicy: add MP... |
1793 1794 |
if (!nnodes) return numa_node_id(); |
fee83b3ab mm/mempolicy.c:of... |
1795 1796 1797 |
target = (unsigned int)n % nnodes; nid = first_node(pol->v.nodes); for (i = 0; i < target; i++) |
dfcd3c0dc [PATCH] Convert m... |
1798 |
nid = next_node(nid, pol->v.nodes); |
1da177e4c Linux-2.6.12-rc2 |
1799 1800 |
return nid; } |
5da7ca860 [PATCH] Add NUMA ... |
1801 1802 1803 1804 1805 1806 |
/* 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 ... |
1807 1808 1809 1810 1811 1812 1813 1814 1815 |
/* * 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 ... |
1816 |
off += (addr - vma->vm_start) >> shift; |
98c70baad mm: remove useles... |
1817 |
return offset_il_node(pol, off); |
5da7ca860 [PATCH] Add NUMA ... |
1818 1819 1820 |
} else return interleave_nodes(pol); } |
00ac59adf [PATCH] x86_64: F... |
1821 |
#ifdef CONFIG_HUGETLBFS |
480eccf9a Fix NUMA Memory P... |
1822 |
/* |
04ec6264f mm, page_alloc: p... |
1823 |
* huge_node(@vma, @addr, @gfp_flags, @mpol) |
b46e14acb mm/mempolicy.c: p... |
1824 1825 1826 1827 1828 |
* @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... |
1829 |
* |
04ec6264f mm, page_alloc: p... |
1830 |
* Returns a nid suitable for a huge page allocation and a pointer |
52cd3b074 mempolicy: rework... |
1831 1832 1833 |
* 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... |
1834 |
* |
d26914d11 mm: optimize put_... |
1835 |
* Must be protected by read_mems_allowed_begin() |
480eccf9a Fix NUMA Memory P... |
1836 |
*/ |
04ec6264f mm, page_alloc: p... |
1837 1838 |
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 ... |
1839 |
{ |
04ec6264f mm, page_alloc: p... |
1840 |
int nid; |
5da7ca860 [PATCH] Add NUMA ... |
1841 |
|
dd6eecb91 mempolicy: unexpo... |
1842 |
*mpol = get_vma_policy(vma, addr); |
19770b326 mm: filter based ... |
1843 |
*nodemask = NULL; /* assume !MPOL_BIND */ |
5da7ca860 [PATCH] Add NUMA ... |
1844 |
|
52cd3b074 mempolicy: rework... |
1845 |
if (unlikely((*mpol)->mode == MPOL_INTERLEAVE)) { |
04ec6264f mm, page_alloc: p... |
1846 1847 |
nid = interleave_nid(*mpol, vma, addr, huge_page_shift(hstate_vma(vma))); |
52cd3b074 mempolicy: rework... |
1848 |
} else { |
04ec6264f mm, page_alloc: p... |
1849 |
nid = policy_node(gfp_flags, *mpol, numa_node_id()); |
52cd3b074 mempolicy: rework... |
1850 1851 |
if ((*mpol)->mode == MPOL_BIND) *nodemask = &(*mpol)->v.nodes; |
480eccf9a Fix NUMA Memory P... |
1852 |
} |
04ec6264f mm, page_alloc: p... |
1853 |
return nid; |
5da7ca860 [PATCH] Add NUMA ... |
1854 |
} |
06808b082 hugetlb: derive h... |
1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 |
/* * 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... |
1879 |
task_lock(current); |
06808b082 hugetlb: derive h... |
1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 |
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: /* Fall through */ case MPOL_INTERLEAVE: *mask = mempolicy->v.nodes; break; default: BUG(); } |
c0ff7453b cpuset,mm: fix no... |
1899 |
task_unlock(current); |
06808b082 hugetlb: derive h... |
1900 1901 1902 |
return true; } |
00ac59adf [PATCH] x86_64: F... |
1903 |
#endif |
5da7ca860 [PATCH] Add NUMA ... |
1904 |
|
6f48d0ebd oom: select task ... |
1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 |
/* * 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 |
1948 1949 |
/* Allocate a page in interleaved policy. Own path because it needs to do special accounting. */ |
662f3a0b9 [PATCH] Remove ne... |
1950 1951 |
static struct page *alloc_page_interleave(gfp_t gfp, unsigned order, unsigned nid) |
1da177e4c Linux-2.6.12-rc2 |
1952 |
{ |
1da177e4c Linux-2.6.12-rc2 |
1953 |
struct page *page; |
04ec6264f mm, page_alloc: p... |
1954 |
page = __alloc_pages(gfp, order, nid); |
4518085e1 mm, sysctl: make ... |
1955 1956 1957 |
/* 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... |
1958 1959 1960 1961 1962 |
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 |
1963 1964 1965 1966 |
return page; } /** |
0bbbc0b33 thp: add numa awa... |
1967 |
* alloc_pages_vma - Allocate a page for a VMA. |
1da177e4c Linux-2.6.12-rc2 |
1968 1969 1970 1971 1972 1973 1974 1975 |
* * @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... |
1976 |
* @order:Order of the GFP allocation. |
1da177e4c Linux-2.6.12-rc2 |
1977 1978 |
* @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... |
1979 |
* @node: Which node to prefer for allocation (modulo policy). |
19deb7695 Revert "Revert "R... |
1980 |
* @hugepage: for hugepages try only the preferred node if possible |
1da177e4c Linux-2.6.12-rc2 |
1981 1982 1983 1984 1985 |
* * This function allocates a page from the kernel page pool and applies * a NUMA policy associated with the VMA or the current process. * When VMA is not NULL caller must hold down_read on the mmap_sem of the * mm_struct of the VMA to prevent it from going away. Should be used for |
be97a41b2 mm/mempolicy.c: m... |
1986 1987 |
* 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 |
1988 1989 |
*/ struct page * |
0bbbc0b33 thp: add numa awa... |
1990 |
alloc_pages_vma(gfp_t gfp, int order, struct vm_area_struct *vma, |
19deb7695 Revert "Revert "R... |
1991 |
unsigned long addr, int node, bool hugepage) |
1da177e4c Linux-2.6.12-rc2 |
1992 |
{ |
cc9a6c877 cpuset: mm: reduc... |
1993 |
struct mempolicy *pol; |
c0ff7453b cpuset,mm: fix no... |
1994 |
struct page *page; |
04ec6264f mm, page_alloc: p... |
1995 |
int preferred_nid; |
be97a41b2 mm/mempolicy.c: m... |
1996 |
nodemask_t *nmask; |
cc9a6c877 cpuset: mm: reduc... |
1997 |
|
dd6eecb91 mempolicy: unexpo... |
1998 |
pol = get_vma_policy(vma, addr); |
1da177e4c Linux-2.6.12-rc2 |
1999 |
|
0867a57c4 mm, thp: respect ... |
2000 2001 2002 2003 2004 2005 2006 |
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... |
2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 |
} 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); page = __alloc_pages_node(hpage_node, gfp | __GFP_THISNODE, order); |
76e654cc9 mm, page_alloc: a... |
2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 |
/* * If hugepage allocations are configured to always * synchronous compact or the vma has been madvised * to prefer hugepage backing, retry allowing remote * memory as well. */ if (!page && (gfp & __GFP_DIRECT_RECLAIM)) page = __alloc_pages_node(hpage_node, gfp | __GFP_NORETRY, order); |
19deb7695 Revert "Revert "R... |
2040 2041 |
goto out; } |
356ff8a9a Revert "mm, thp: ... |
2042 |
} |
be97a41b2 mm/mempolicy.c: m... |
2043 |
nmask = policy_nodemask(gfp, pol); |
04ec6264f mm, page_alloc: p... |
2044 2045 |
preferred_nid = policy_node(gfp, pol, node); page = __alloc_pages_nodemask(gfp, order, preferred_nid, nmask); |
d51e9894d mm/mempolicy.c: d... |
2046 |
mpol_cond_put(pol); |
be97a41b2 mm/mempolicy.c: m... |
2047 |
out: |
c0ff7453b cpuset,mm: fix no... |
2048 |
return page; |
1da177e4c Linux-2.6.12-rc2 |
2049 |
} |
692622157 mm: export alloc_... |
2050 |
EXPORT_SYMBOL(alloc_pages_vma); |
1da177e4c Linux-2.6.12-rc2 |
2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 |
/** * 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 |
2066 |
*/ |
dd0fc66fb [PATCH] gfp flags... |
2067 |
struct page *alloc_pages_current(gfp_t gfp, unsigned order) |
1da177e4c Linux-2.6.12-rc2 |
2068 |
{ |
8d90274b3 mempolicy: saniti... |
2069 |
struct mempolicy *pol = &default_policy; |
c0ff7453b cpuset,mm: fix no... |
2070 |
struct page *page; |
1da177e4c Linux-2.6.12-rc2 |
2071 |
|
8d90274b3 mempolicy: saniti... |
2072 2073 |
if (!in_interrupt() && !(gfp & __GFP_THISNODE)) pol = get_task_policy(current); |
52cd3b074 mempolicy: rework... |
2074 2075 2076 2077 2078 |
/* * No reference counting needed for current->mempolicy * nor system default_policy */ |
45c4745af mempolicy: rename... |
2079 |
if (pol->mode == MPOL_INTERLEAVE) |
c0ff7453b cpuset,mm: fix no... |
2080 2081 2082 |
page = alloc_page_interleave(gfp, order, interleave_nodes(pol)); else page = __alloc_pages_nodemask(gfp, order, |
04ec6264f mm, page_alloc: p... |
2083 |
policy_node(gfp, pol, numa_node_id()), |
5c4b4be3b mm: use correct n... |
2084 |
policy_nodemask(gfp, pol)); |
cc9a6c877 cpuset: mm: reduc... |
2085 |
|
c0ff7453b cpuset,mm: fix no... |
2086 |
return page; |
1da177e4c Linux-2.6.12-rc2 |
2087 2088 |
} EXPORT_SYMBOL(alloc_pages_current); |
ef0855d33 mm: mempolicy: tu... |
2089 2090 2091 2092 2093 2094 2095 2096 2097 |
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... |
2098 |
/* |
846a16bf0 mempolicy: rename... |
2099 |
* If mpol_dup() sees current->cpuset == cpuset_being_rebound, then it |
4225399a6 [PATCH] cpuset: r... |
2100 2101 2102 2103 |
* 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... |
2104 2105 2106 |
* * 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... |
2107 |
*/ |
4225399a6 [PATCH] cpuset: r... |
2108 |
|
846a16bf0 mempolicy: rename... |
2109 2110 |
/* Slow path of a mempolicy duplicate */ struct mempolicy *__mpol_dup(struct mempolicy *old) |
1da177e4c Linux-2.6.12-rc2 |
2111 2112 2113 2114 2115 |
{ struct mempolicy *new = kmem_cache_alloc(policy_cache, GFP_KERNEL); if (!new) return ERR_PTR(-ENOMEM); |
708c1bbc9 mempolicy: restru... |
2116 2117 2118 2119 2120 2121 2122 2123 |
/* 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... |
2124 2125 |
if (current_cpuset_is_being_rebound()) { nodemask_t mems = cpuset_mems_allowed(current); |
213980c0f mm, mempolicy: si... |
2126 |
mpol_rebind_policy(new, &mems); |
4225399a6 [PATCH] cpuset: r... |
2127 |
} |
1da177e4c Linux-2.6.12-rc2 |
2128 |
atomic_set(&new->refcnt, 1); |
1da177e4c Linux-2.6.12-rc2 |
2129 2130 2131 2132 |
return new; } /* Slow path of a mempolicy comparison */ |
fcfb4dcc9 mm/mempolicy.c: m... |
2133 |
bool __mpol_equal(struct mempolicy *a, struct mempolicy *b) |
1da177e4c Linux-2.6.12-rc2 |
2134 2135 |
{ if (!a || !b) |
fcfb4dcc9 mm/mempolicy.c: m... |
2136 |
return false; |
45c4745af mempolicy: rename... |
2137 |
if (a->mode != b->mode) |
fcfb4dcc9 mm/mempolicy.c: m... |
2138 |
return false; |
198005025 mempolicy: remove... |
2139 |
if (a->flags != b->flags) |
fcfb4dcc9 mm/mempolicy.c: m... |
2140 |
return false; |
198005025 mempolicy: remove... |
2141 2142 |
if (mpol_store_user_nodemask(a)) if (!nodes_equal(a->w.user_nodemask, b->w.user_nodemask)) |
fcfb4dcc9 mm/mempolicy.c: m... |
2143 |
return false; |
198005025 mempolicy: remove... |
2144 |
|
45c4745af mempolicy: rename... |
2145 |
switch (a->mode) { |
19770b326 mm: filter based ... |
2146 2147 |
case MPOL_BIND: /* Fall through */ |
1da177e4c Linux-2.6.12-rc2 |
2148 |
case MPOL_INTERLEAVE: |
fcfb4dcc9 mm/mempolicy.c: m... |
2149 |
return !!nodes_equal(a->v.nodes, b->v.nodes); |
1da177e4c Linux-2.6.12-rc2 |
2150 |
case MPOL_PREFERRED: |
8970a63e9 mm/mempolicy.c: a... |
2151 2152 2153 |
/* a's ->flags is the same as b's */ if (a->flags & MPOL_F_LOCAL) return true; |
757196618 mempolicy: remove... |
2154 |
return a->v.preferred_node == b->v.preferred_node; |
1da177e4c Linux-2.6.12-rc2 |
2155 2156 |
default: BUG(); |
fcfb4dcc9 mm/mempolicy.c: m... |
2157 |
return false; |
1da177e4c Linux-2.6.12-rc2 |
2158 2159 |
} } |
1da177e4c Linux-2.6.12-rc2 |
2160 |
/* |
1da177e4c Linux-2.6.12-rc2 |
2161 2162 2163 2164 |
* 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... |
2165 |
* They are protected by the sp->lock rwlock, which should be held |
1da177e4c Linux-2.6.12-rc2 |
2166 2167 |
* for any accesses to the tree. */ |
4a8c7bb59 mm/mempolicy.c: c... |
2168 2169 2170 2171 |
/* * lookup first element intersecting start-end. Caller holds sp->lock for * reading or for writing */ |
1da177e4c Linux-2.6.12-rc2 |
2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 2188 2189 2190 2191 2192 2193 2194 2195 2196 2197 2198 2199 2200 |
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... |
2201 2202 2203 2204 |
/* * Insert a new shared policy into the list. Caller holds sp->lock for * writing. */ |
1da177e4c Linux-2.6.12-rc2 |
2205 2206 2207 2208 2209 2210 2211 2212 2213 2214 2215 2216 2217 2218 2219 2220 2221 2222 |
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: ... |
2223 2224 |
pr_debug("inserting %lx-%lx: %d ", new->start, new->end, |
45c4745af mempolicy: rename... |
2225 |
new->policy ? new->policy->mode : 0); |
1da177e4c Linux-2.6.12-rc2 |
2226 2227 2228 2229 2230 2231 2232 2233 2234 2235 2236 |
} /* 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... |
2237 |
read_lock(&sp->lock); |
1da177e4c Linux-2.6.12-rc2 |
2238 2239 2240 2241 2242 |
sn = sp_lookup(sp, idx, idx+1); if (sn) { mpol_get(sn->policy); pol = sn->policy; } |
4a8c7bb59 mm/mempolicy.c: c... |
2243 |
read_unlock(&sp->lock); |
1da177e4c Linux-2.6.12-rc2 |
2244 2245 |
return pol; } |
63f74ca21 mempolicy: fix re... |
2246 2247 2248 2249 2250 |
static void sp_free(struct sp_node *n) { mpol_put(n->policy); kmem_cache_free(sn_cache, n); } |
771fb4d80 mm: mempolicy: Ch... |
2251 2252 2253 |
/** * mpol_misplaced - check whether current page node is valid in policy * |
b46e14acb mm/mempolicy.c: p... |
2254 2255 2256 |
* @page: page to be checked * @vma: vm area where page mapped * @addr: virtual address where page mapped |
771fb4d80 mm: mempolicy: Ch... |
2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 |
* * 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... |
2271 |
struct zoneref *z; |
771fb4d80 mm: mempolicy: Ch... |
2272 2273 |
int curnid = page_to_nid(page); unsigned long pgoff; |
90572890d mm: numa: Change ... |
2274 2275 |
int thiscpu = raw_smp_processor_id(); int thisnid = cpu_to_node(thiscpu); |
98fa15f34 mm: replace all o... |
2276 |
int polnid = NUMA_NO_NODE; |
771fb4d80 mm: mempolicy: Ch... |
2277 |
int ret = -1; |
dd6eecb91 mempolicy: unexpo... |
2278 |
pol = get_vma_policy(vma, addr); |
771fb4d80 mm: mempolicy: Ch... |
2279 2280 2281 2282 2283 |
if (!(pol->flags & MPOL_F_MOF)) goto out; switch (pol->mode) { case MPOL_INTERLEAVE: |
771fb4d80 mm: mempolicy: Ch... |
2284 2285 |
pgoff = vma->vm_pgoff; pgoff += (addr - vma->vm_start) >> PAGE_SHIFT; |
98c70baad mm: remove useles... |
2286 |
polnid = offset_il_node(pol, pgoff); |
771fb4d80 mm: mempolicy: Ch... |
2287 2288 2289 2290 2291 2292 2293 2294 2295 2296 |
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... |
2297 |
|
771fb4d80 mm: mempolicy: Ch... |
2298 2299 2300 2301 2302 2303 2304 2305 |
/* * 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... |
2306 |
z = first_zones_zonelist( |
771fb4d80 mm: mempolicy: Ch... |
2307 2308 |
node_zonelist(numa_node_id(), GFP_HIGHUSER), gfp_zone(GFP_HIGHUSER), |
c33d6c06f mm, page_alloc: a... |
2309 |
&pol->v.nodes); |
c1093b746 mm: access zone->... |
2310 |
polnid = zone_to_nid(z->zone); |
771fb4d80 mm: mempolicy: Ch... |
2311 2312 2313 2314 2315 |
break; default: BUG(); } |
5606e3877 mm: numa: Migrate... |
2316 2317 |
/* Migrate the page towards the node whose CPU is referencing it */ |
e42c8ff29 mm: numa: Use a t... |
2318 |
if (pol->flags & MPOL_F_MORON) { |
90572890d mm: numa: Change ... |
2319 |
polnid = thisnid; |
5606e3877 mm: numa: Migrate... |
2320 |
|
10f390427 sched/numa, mm: U... |
2321 |
if (!should_numa_migrate_memory(current, page, curnid, thiscpu)) |
de1c9ce6f sched/numa: Skip ... |
2322 |
goto out; |
e42c8ff29 mm: numa: Use a t... |
2323 |
} |
771fb4d80 mm: mempolicy: Ch... |
2324 2325 2326 2327 2328 2329 2330 |
if (curnid != polnid) ret = polnid; out: mpol_cond_put(pol); return ret; } |
c11600e4f mm, mempolicy: ta... |
2331 2332 2333 2334 2335 2336 2337 2338 2339 2340 2341 2342 2343 2344 2345 2346 |
/* * 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 |
2347 2348 |
static void sp_delete(struct shared_policy *sp, struct sp_node *n) { |
140d5a490 numa: mempolicy: ... |
2349 2350 |
pr_debug("deleting %lx-l%lx ", n->start, n->end); |
1da177e4c Linux-2.6.12-rc2 |
2351 |
rb_erase(&n->nd, &sp->root); |
63f74ca21 mempolicy: fix re... |
2352 |
sp_free(n); |
1da177e4c Linux-2.6.12-rc2 |
2353 |
} |
42288fe36 mm: mempolicy: Co... |
2354 2355 2356 2357 2358 2359 2360 |
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... |
2361 2362 |
static struct sp_node *sp_alloc(unsigned long start, unsigned long end, struct mempolicy *pol) |
1da177e4c Linux-2.6.12-rc2 |
2363 |
{ |
869833f2c mempolicy: remove... |
2364 2365 |
struct sp_node *n; struct mempolicy *newpol; |
1da177e4c Linux-2.6.12-rc2 |
2366 |
|
869833f2c mempolicy: remove... |
2367 |
n = kmem_cache_alloc(sn_cache, GFP_KERNEL); |
1da177e4c Linux-2.6.12-rc2 |
2368 2369 |
if (!n) return NULL; |
869833f2c mempolicy: remove... |
2370 2371 2372 2373 2374 2375 2376 |
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... |
2377 |
sp_node_init(n, start, end, newpol); |
869833f2c mempolicy: remove... |
2378 |
|
1da177e4c Linux-2.6.12-rc2 |
2379 2380 2381 2382 2383 2384 2385 |
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 ... |
2386 |
struct sp_node *n; |
42288fe36 mm: mempolicy: Co... |
2387 2388 |
struct sp_node *n_new = NULL; struct mempolicy *mpol_new = NULL; |
b22d127a3 mempolicy: fix a ... |
2389 |
int ret = 0; |
1da177e4c Linux-2.6.12-rc2 |
2390 |
|
42288fe36 mm: mempolicy: Co... |
2391 |
restart: |
4a8c7bb59 mm/mempolicy.c: c... |
2392 |
write_lock(&sp->lock); |
1da177e4c Linux-2.6.12-rc2 |
2393 2394 2395 2396 2397 2398 2399 2400 2401 2402 2403 2404 |
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... |
2405 2406 2407 2408 2409 |
if (!n_new) goto alloc_new; *mpol_new = *n->policy; atomic_set(&mpol_new->refcnt, 1); |
7880639c3 mm/mempolicy.c: f... |
2410 |
sp_node_init(n_new, end, n->end, mpol_new); |
1da177e4c Linux-2.6.12-rc2 |
2411 |
n->end = start; |
5ca395751 mm/mempolicy.c: f... |
2412 |
sp_insert(sp, n_new); |
42288fe36 mm: mempolicy: Co... |
2413 2414 |
n_new = NULL; mpol_new = NULL; |
1da177e4c Linux-2.6.12-rc2 |
2415 2416 2417 2418 2419 2420 2421 2422 2423 2424 |
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... |
2425 |
write_unlock(&sp->lock); |
42288fe36 mm: mempolicy: Co... |
2426 2427 2428 2429 2430 2431 2432 |
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 ... |
2433 |
return ret; |
42288fe36 mm: mempolicy: Co... |
2434 2435 |
alloc_new: |
4a8c7bb59 mm/mempolicy.c: c... |
2436 |
write_unlock(&sp->lock); |
42288fe36 mm: mempolicy: Co... |
2437 2438 2439 2440 2441 2442 2443 2444 |
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 |
2445 |
} |
71fe804b6 mempolicy: use st... |
2446 2447 2448 2449 2450 2451 2452 2453 |
/** * 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... |
2454 |
* This is called at get_inode() calls and we can use GFP_KERNEL. |
71fe804b6 mempolicy: use st... |
2455 2456 2457 |
*/ void mpol_shared_policy_init(struct shared_policy *sp, struct mempolicy *mpol) { |
58568d2a8 cpuset,mm: update... |
2458 |
int ret; |
71fe804b6 mempolicy: use st... |
2459 |
sp->root = RB_ROOT; /* empty tree == default mempolicy */ |
4a8c7bb59 mm/mempolicy.c: c... |
2460 |
rwlock_init(&sp->lock); |
71fe804b6 mempolicy: use st... |
2461 2462 2463 2464 |
if (mpol) { struct vm_area_struct pvma; struct mempolicy *new; |
4bfc44958 mm: make set_memp... |
2465 |
NODEMASK_SCRATCH(scratch); |
71fe804b6 mempolicy: use st... |
2466 |
|
4bfc44958 mm: make set_memp... |
2467 |
if (!scratch) |
5c0c16549 mempolicy: fix da... |
2468 |
goto put_mpol; |
71fe804b6 mempolicy: use st... |
2469 2470 |
/* contextualize the tmpfs mount point mempolicy */ new = mpol_new(mpol->mode, mpol->flags, &mpol->w.user_nodemask); |
15d77835a mempolicy: factor... |
2471 |
if (IS_ERR(new)) |
0cae3457b mempolicy: ERR_PT... |
2472 |
goto free_scratch; /* no valid nodemask intersection */ |
58568d2a8 cpuset,mm: update... |
2473 2474 |
task_lock(current); |
4bfc44958 mm: make set_memp... |
2475 |
ret = mpol_set_nodemask(new, &mpol->w.user_nodemask, scratch); |
58568d2a8 cpuset,mm: update... |
2476 |
task_unlock(current); |
15d77835a mempolicy: factor... |
2477 |
if (ret) |
5c0c16549 mempolicy: fix da... |
2478 |
goto put_new; |
71fe804b6 mempolicy: use st... |
2479 2480 |
/* Create pseudo-vma that contains just the policy */ |
2c4541e24 mm: use vma_init(... |
2481 |
vma_init(&pvma, NULL); |
71fe804b6 mempolicy: use st... |
2482 2483 |
pvma.vm_end = TASK_SIZE; /* policy covers entire file */ mpol_set_shared_policy(sp, &pvma, new); /* adds ref */ |
15d77835a mempolicy: factor... |
2484 |
|
5c0c16549 mempolicy: fix da... |
2485 |
put_new: |
71fe804b6 mempolicy: use st... |
2486 |
mpol_put(new); /* drop initial ref */ |
0cae3457b mempolicy: ERR_PT... |
2487 |
free_scratch: |
4bfc44958 mm: make set_memp... |
2488 |
NODEMASK_SCRATCH_FREE(scratch); |
5c0c16549 mempolicy: fix da... |
2489 2490 |
put_mpol: mpol_put(mpol); /* drop our incoming ref on sb mpol */ |
7339ff830 [PATCH] Add tmpfs... |
2491 2492 |
} } |
1da177e4c Linux-2.6.12-rc2 |
2493 2494 2495 2496 2497 2498 |
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... |
2499 2500 |
pr_debug("set_shared_policy %lx sz %lu %d %d %lx ", |
1da177e4c Linux-2.6.12-rc2 |
2501 |
vma->vm_pgoff, |
45c4745af mempolicy: rename... |
2502 |
sz, npol ? npol->mode : -1, |
028fec414 mempolicy: suppor... |
2503 |
npol ? npol->flags : -1, |
00ef2d2f8 mm: use NUMA_NO_NODE |
2504 |
npol ? nodes_addr(npol->v.nodes)[0] : NUMA_NO_NODE); |
1da177e4c Linux-2.6.12-rc2 |
2505 2506 2507 2508 2509 2510 2511 2512 |
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... |
2513 |
sp_free(new); |
1da177e4c Linux-2.6.12-rc2 |
2514 2515 2516 2517 2518 2519 2520 2521 2522 2523 2524 |
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... |
2525 |
write_lock(&p->lock); |
1da177e4c Linux-2.6.12-rc2 |
2526 2527 2528 2529 |
next = rb_first(&p->root); while (next) { n = rb_entry(next, struct sp_node, nd); next = rb_next(&n->nd); |
63f74ca21 mempolicy: fix re... |
2530 |
sp_delete(p, n); |
1da177e4c Linux-2.6.12-rc2 |
2531 |
} |
4a8c7bb59 mm/mempolicy.c: c... |
2532 |
write_unlock(&p->lock); |
1da177e4c Linux-2.6.12-rc2 |
2533 |
} |
1a687c2e9 mm: sched: numa: ... |
2534 |
#ifdef CONFIG_NUMA_BALANCING |
c297663c0 mm: numa: initial... |
2535 |
static int __initdata numabalancing_override; |
1a687c2e9 mm: sched: numa: ... |
2536 2537 2538 2539 2540 2541 2542 |
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... |
2543 2544 2545 |
/* Parsed by setup_numabalancing. override == 1 enables, -1 disables */ if (numabalancing_override) set_numabalancing_state(numabalancing_override == 1); |
b0dc2b9bb mm, numa: really ... |
2546 |
if (num_online_nodes() > 1 && !numabalancing_override) { |
756a025f0 mm: coalesce spli... |
2547 2548 |
pr_info("%s automatic NUMA balancing. Configure with numa_balancing= or the kernel.numa_balancing sysctl ", |
c297663c0 mm: numa: initial... |
2549 |
numabalancing_default ? "Enabling" : "Disabling"); |
1a687c2e9 mm: sched: numa: ... |
2550 2551 2552 2553 2554 2555 2556 2557 2558 |
set_numabalancing_state(numabalancing_default); } } static int __init setup_numabalancing(char *str) { int ret = 0; if (!str) goto out; |
1a687c2e9 mm: sched: numa: ... |
2559 2560 |
if (!strcmp(str, "enable")) { |
c297663c0 mm: numa: initial... |
2561 |
numabalancing_override = 1; |
1a687c2e9 mm: sched: numa: ... |
2562 2563 |
ret = 1; } else if (!strcmp(str, "disable")) { |
c297663c0 mm: numa: initial... |
2564 |
numabalancing_override = -1; |
1a687c2e9 mm: sched: numa: ... |
2565 2566 2567 2568 |
ret = 1; } out: if (!ret) |
4a404bea9 mm/mempolicy.c: c... |
2569 2570 |
pr_warn("Unable to parse numa_balancing= "); |
1a687c2e9 mm: sched: numa: ... |
2571 2572 2573 2574 2575 2576 2577 2578 2579 |
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 |
2580 2581 2582 |
/* assumes fs == KERNEL_DS */ void __init numa_policy_init(void) { |
b71636e29 numa: mempolicy: ... |
2583 2584 2585 |
nodemask_t interleave_nodes; unsigned long largest = 0; int nid, prefer = 0; |
1da177e4c Linux-2.6.12-rc2 |
2586 2587 |
policy_cache = kmem_cache_create("numa_policy", sizeof(struct mempolicy), |
20c2df83d mm: Remove slab d... |
2588 |
0, SLAB_PANIC, NULL); |
1da177e4c Linux-2.6.12-rc2 |
2589 2590 2591 |
sn_cache = kmem_cache_create("shared_policy_node", sizeof(struct sp_node), |
20c2df83d mm: Remove slab d... |
2592 |
0, SLAB_PANIC, NULL); |
1da177e4c Linux-2.6.12-rc2 |
2593 |
|
5606e3877 mm: numa: Migrate... |
2594 2595 2596 2597 2598 2599 2600 2601 |
for_each_node(nid) { preferred_node_policy[nid] = (struct mempolicy) { .refcnt = ATOMIC_INIT(1), .mode = MPOL_PREFERRED, .flags = MPOL_F_MOF | MPOL_F_MORON, .v = { .preferred_node = nid, }, }; } |
b71636e29 numa: mempolicy: ... |
2602 2603 2604 2605 2606 2607 |
/* * 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_... |
2608 |
for_each_node_state(nid, N_MEMORY) { |
b71636e29 numa: mempolicy: ... |
2609 2610 2611 2612 2613 2614 2615 2616 2617 2618 2619 2620 2621 2622 2623 2624 |
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 |
2625 |
|
028fec414 mempolicy: suppor... |
2626 |
if (do_set_mempolicy(MPOL_INTERLEAVE, 0, &interleave_nodes)) |
b1de0d139 mm: convert some ... |
2627 2628 |
pr_err("%s: interleaving failed ", __func__); |
1a687c2e9 mm: sched: numa: ... |
2629 2630 |
check_numabalancing_enable(); |
1da177e4c Linux-2.6.12-rc2 |
2631 |
} |
8bccd85ff [PATCH] Implement... |
2632 |
/* Reset policy of current process to default */ |
1da177e4c Linux-2.6.12-rc2 |
2633 2634 |
void numa_default_policy(void) { |
028fec414 mempolicy: suppor... |
2635 |
do_set_mempolicy(MPOL_DEFAULT, 0, NULL); |
1da177e4c Linux-2.6.12-rc2 |
2636 |
} |
68860ec10 [PATCH] cpusets: ... |
2637 |
|
4225399a6 [PATCH] cpuset: r... |
2638 |
/* |
095f1fc4e mempolicy: rework... |
2639 2640 2641 2642 |
* Parse and format mempolicy from/to strings */ /* |
f2a07f40d tmpfs mempolicy: ... |
2643 |
* "local" is implemented internally by MPOL_PREFERRED with MPOL_F_LOCAL flag. |
1a75a6c82 [PATCH] Fold numa... |
2644 |
*/ |
345ace9c7 mempolicy: rename... |
2645 2646 2647 2648 2649 2650 |
static const char * const policy_modes[] = { [MPOL_DEFAULT] = "default", [MPOL_PREFERRED] = "prefer", [MPOL_BIND] = "bind", [MPOL_INTERLEAVE] = "interleave", |
d3a710337 mm: mempolicy: Ad... |
2651 |
[MPOL_LOCAL] = "local", |
345ace9c7 mempolicy: rename... |
2652 |
}; |
1a75a6c82 [PATCH] Fold numa... |
2653 |
|
095f1fc4e mempolicy: rework... |
2654 2655 2656 |
#ifdef CONFIG_TMPFS /** |
f2a07f40d tmpfs mempolicy: ... |
2657 |
* mpol_parse_str - parse string to mempolicy, for tmpfs mpol mount option. |
095f1fc4e mempolicy: rework... |
2658 |
* @str: string containing mempolicy to parse |
71fe804b6 mempolicy: use st... |
2659 |
* @mpol: pointer to struct mempolicy pointer, returned on success. |
095f1fc4e mempolicy: rework... |
2660 2661 2662 2663 |
* * Format of input: * <mode>[=<flags>][:<nodelist>] * |
71fe804b6 mempolicy: use st... |
2664 |
* On success, returns 0, else 1 |
095f1fc4e mempolicy: rework... |
2665 |
*/ |
a7a88b237 mempolicy: remove... |
2666 |
int mpol_parse_str(char *str, struct mempolicy **mpol) |
095f1fc4e mempolicy: rework... |
2667 |
{ |
71fe804b6 mempolicy: use st... |
2668 |
struct mempolicy *new = NULL; |
f2a07f40d tmpfs mempolicy: ... |
2669 |
unsigned short mode_flags; |
71fe804b6 mempolicy: use st... |
2670 |
nodemask_t nodes; |
095f1fc4e mempolicy: rework... |
2671 2672 |
char *nodelist = strchr(str, ':'); char *flags = strchr(str, '='); |
dedf2c73b mm/mempolicy.c: u... |
2673 |
int err = 1, mode; |
095f1fc4e mempolicy: rework... |
2674 |
|
9bcdb8ba5 mm/mempolicy.c: f... |
2675 2676 |
if (flags) *flags++ = '\0'; /* terminate mode string */ |
095f1fc4e mempolicy: rework... |
2677 2678 2679 |
if (nodelist) { /* NUL-terminate mode or flags string */ *nodelist++ = '\0'; |
71fe804b6 mempolicy: use st... |
2680 |
if (nodelist_parse(nodelist, nodes)) |
095f1fc4e mempolicy: rework... |
2681 |
goto out; |
01f13bd60 mempolicy: use N_... |
2682 |
if (!nodes_subset(nodes, node_states[N_MEMORY])) |
095f1fc4e mempolicy: rework... |
2683 |
goto out; |
71fe804b6 mempolicy: use st... |
2684 2685 |
} else nodes_clear(nodes); |
dedf2c73b mm/mempolicy.c: u... |
2686 2687 |
mode = match_string(policy_modes, MPOL_MAX, str); if (mode < 0) |
095f1fc4e mempolicy: rework... |
2688 |
goto out; |
71fe804b6 mempolicy: use st... |
2689 |
switch (mode) { |
095f1fc4e mempolicy: rework... |
2690 |
case MPOL_PREFERRED: |
71fe804b6 mempolicy: use st... |
2691 |
/* |
c3f87e03f mm: mempolicy: re... |
2692 2693 2694 |
* Insist on a nodelist of one node only, although later * we use first_node(nodes) to grab a single node, so here * nodelist (or nodes) cannot be empty. |
71fe804b6 mempolicy: use st... |
2695 |
*/ |
095f1fc4e mempolicy: rework... |
2696 2697 2698 2699 |
if (nodelist) { char *rest = nodelist; while (isdigit(*rest)) rest++; |
926f2ae04 tmpfs: cleanup mp... |
2700 2701 |
if (*rest) goto out; |
c3f87e03f mm: mempolicy: re... |
2702 2703 |
if (nodes_empty(nodes)) goto out; |
095f1fc4e mempolicy: rework... |
2704 2705 |
} break; |
095f1fc4e mempolicy: rework... |
2706 2707 2708 2709 2710 |
case MPOL_INTERLEAVE: /* * Default to online nodes with memory if no nodelist */ if (!nodelist) |
01f13bd60 mempolicy: use N_... |
2711 |
nodes = node_states[N_MEMORY]; |
3f226aa1c mempolicy: suppor... |
2712 |
break; |
71fe804b6 mempolicy: use st... |
2713 |
case MPOL_LOCAL: |
3f226aa1c mempolicy: suppor... |
2714 |
/* |
71fe804b6 mempolicy: use st... |
2715 |
* Don't allow a nodelist; mpol_new() checks flags |
3f226aa1c mempolicy: suppor... |
2716 |
*/ |
71fe804b6 mempolicy: use st... |
2717 |
if (nodelist) |
3f226aa1c mempolicy: suppor... |
2718 |
goto out; |
71fe804b6 mempolicy: use st... |
2719 |
mode = MPOL_PREFERRED; |
3f226aa1c mempolicy: suppor... |
2720 |
break; |
413b43dea tmpfs: fix oops o... |
2721 2722 2723 2724 2725 2726 2727 |
case MPOL_DEFAULT: /* * Insist on a empty nodelist */ if (!nodelist) err = 0; goto out; |
d69b2e63e tmpfs: mpol=bind:... |
2728 2729 2730 2731 2732 2733 |
case MPOL_BIND: /* * Insist on a nodelist */ if (!nodelist) goto out; |
095f1fc4e mempolicy: rework... |
2734 |
} |
71fe804b6 mempolicy: use st... |
2735 |
mode_flags = 0; |
095f1fc4e mempolicy: rework... |
2736 2737 2738 2739 2740 2741 |
if (flags) { /* * Currently, we only support two mutually exclusive * mode flags. */ if (!strcmp(flags, "static")) |
71fe804b6 mempolicy: use st... |
2742 |
mode_flags |= MPOL_F_STATIC_NODES; |
095f1fc4e mempolicy: rework... |
2743 |
else if (!strcmp(flags, "relative")) |
71fe804b6 mempolicy: use st... |
2744 |
mode_flags |= MPOL_F_RELATIVE_NODES; |
095f1fc4e mempolicy: rework... |
2745 |
else |
926f2ae04 tmpfs: cleanup mp... |
2746 |
goto out; |
095f1fc4e mempolicy: rework... |
2747 |
} |
71fe804b6 mempolicy: use st... |
2748 2749 2750 |
new = mpol_new(mode, mode_flags, &nodes); if (IS_ERR(new)) |
926f2ae04 tmpfs: cleanup mp... |
2751 |
goto out; |
f2a07f40d tmpfs mempolicy: ... |
2752 2753 2754 2755 2756 2757 2758 2759 2760 2761 2762 2763 2764 2765 2766 2767 |
/* * 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... |
2768 |
err = 0; |
71fe804b6 mempolicy: use st... |
2769 |
|
095f1fc4e mempolicy: rework... |
2770 2771 2772 2773 2774 2775 |
out: /* Restore string for error message */ if (nodelist) *--nodelist = ':'; if (flags) *--flags = '='; |
71fe804b6 mempolicy: use st... |
2776 2777 |
if (!err) *mpol = new; |
095f1fc4e mempolicy: rework... |
2778 2779 2780 |
return err; } #endif /* CONFIG_TMPFS */ |
71fe804b6 mempolicy: use st... |
2781 2782 2783 2784 2785 |
/** * 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... |
2786 |
* |
948927ee9 mm, mempolicy: ma... |
2787 2788 2789 |
* 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... |
2790 |
*/ |
948927ee9 mm, mempolicy: ma... |
2791 |
void mpol_to_str(char *buffer, int maxlen, struct mempolicy *pol) |
1a75a6c82 [PATCH] Fold numa... |
2792 2793 |
{ char *p = buffer; |
948927ee9 mm, mempolicy: ma... |
2794 2795 2796 |
nodemask_t nodes = NODE_MASK_NONE; unsigned short mode = MPOL_DEFAULT; unsigned short flags = 0; |
2291990ab mempolicy: clean-... |
2797 |
|
8790c71a1 mm/mempolicy.c: f... |
2798 |
if (pol && pol != &default_policy && !(pol->flags & MPOL_F_MORON)) { |
bea904d54 mempolicy: use MP... |
2799 |
mode = pol->mode; |
948927ee9 mm, mempolicy: ma... |
2800 2801 |
flags = pol->flags; } |
bea904d54 mempolicy: use MP... |
2802 |
|
1a75a6c82 [PATCH] Fold numa... |
2803 2804 |
switch (mode) { case MPOL_DEFAULT: |
1a75a6c82 [PATCH] Fold numa... |
2805 |
break; |
1a75a6c82 [PATCH] Fold numa... |
2806 |
case MPOL_PREFERRED: |
fc36b8d3d mempolicy: use MP... |
2807 |
if (flags & MPOL_F_LOCAL) |
f2a07f40d tmpfs mempolicy: ... |
2808 |
mode = MPOL_LOCAL; |
53f2556b6 mempolicy: mPOL_P... |
2809 |
else |
fc36b8d3d mempolicy: use MP... |
2810 |
node_set(pol->v.preferred_node, nodes); |
1a75a6c82 [PATCH] Fold numa... |
2811 |
break; |
1a75a6c82 [PATCH] Fold numa... |
2812 |
case MPOL_BIND: |
1a75a6c82 [PATCH] Fold numa... |
2813 |
case MPOL_INTERLEAVE: |
f2a07f40d tmpfs mempolicy: ... |
2814 |
nodes = pol->v.nodes; |
1a75a6c82 [PATCH] Fold numa... |
2815 |
break; |
1a75a6c82 [PATCH] Fold numa... |
2816 |
default: |
948927ee9 mm, mempolicy: ma... |
2817 2818 2819 |
WARN_ON_ONCE(1); snprintf(p, maxlen, "unknown"); return; |
1a75a6c82 [PATCH] Fold numa... |
2820 |
} |
b7a9f420e mm, mempolicy: si... |
2821 |
p += snprintf(p, maxlen, "%s", policy_modes[mode]); |
1a75a6c82 [PATCH] Fold numa... |
2822 |
|
fc36b8d3d mempolicy: use MP... |
2823 |
if (flags & MPOL_MODE_FLAGS) { |
948927ee9 mm, mempolicy: ma... |
2824 |
p += snprintf(p, buffer + maxlen - p, "="); |
f5b087b52 mempolicy: add MP... |
2825 |
|
2291990ab mempolicy: clean-... |
2826 2827 2828 |
/* * Currently, the only defined flags are mutually exclusive */ |
f5b087b52 mempolicy: add MP... |
2829 |
if (flags & MPOL_F_STATIC_NODES) |
2291990ab mempolicy: clean-... |
2830 2831 2832 |
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... |
2833 |
} |
9e763e0f4 mm: use %*pb[l] t... |
2834 2835 2836 |
if (!nodes_empty(nodes)) p += scnprintf(p, buffer + maxlen - p, ":%*pbl", nodemask_pr_args(&nodes)); |
1a75a6c82 [PATCH] Fold numa... |
2837 |
} |