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mm/mempolicy.c
71.4 KB
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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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* Subject to the GNU Public License, version 2. * * 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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*/ #include <linux/mempolicy.h> #include <linux/mm.h> #include <linux/highmem.h> #include <linux/hugetlb.h> #include <linux/kernel.h> #include <linux/sched.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/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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|
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#include <asm/tlbflush.h> #include <asm/uaccess.h> |
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#include <linux/random.h> |
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|
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#include "internal.h" |
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/* Internal flags */ |
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#define MPOL_MF_DISCONTIG_OK (MPOL_MF_INTERNAL << 0) /* Skip checks for continuous vmas */ |
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#define MPOL_MF_INVERT (MPOL_MF_INTERNAL << 1) /* Invert check for nodemask */ |
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|
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static struct kmem_cache *policy_cache; static struct kmem_cache *sn_cache; |
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|
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/* Highest zone. An specific allocation for a zone below that is not policied. */ |
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enum zone_type policy_zone = 0; |
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|
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/* * run-time system-wide default policy => local allocation */ |
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static struct mempolicy default_policy = { |
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.refcnt = ATOMIC_INIT(1), /* never free it */ |
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.mode = MPOL_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]; static struct mempolicy *get_task_policy(struct task_struct *p) { struct mempolicy *pol = p->mempolicy; int node; if (!pol) { node = numa_node_id(); |
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if (node != NUMA_NO_NODE) |
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pol = &preferred_node_policy[node]; /* preferred_node_policy is not initialised early in boot */ if (!pol->mode) pol = NULL; } return pol; } |
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static const struct mempolicy_operations { int (*create)(struct mempolicy *pol, const nodemask_t *nodes); |
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/* * If read-side task has no lock to protect task->mempolicy, write-side * task will rebind the task->mempolicy by two step. The first step is * setting all the newly nodes, and the second step is cleaning all the * disallowed nodes. In this way, we can avoid finding no node to alloc * page. * If we have a lock to protect task->mempolicy in read-side, we do * rebind directly. * * step: * MPOL_REBIND_ONCE - do rebind work at once * MPOL_REBIND_STEP1 - set all the newly nodes * MPOL_REBIND_STEP2 - clean all the disallowed nodes */ void (*rebind)(struct mempolicy *pol, const nodemask_t *nodes, enum mpol_rebind_step step); |
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} mpol_ops[MPOL_MAX]; |
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/* Check that the nodemask contains at least one populated zone */ |
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static int is_valid_nodemask(const nodemask_t *nodemask) |
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{ |
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return nodes_intersects(*nodemask, node_states[N_MEMORY]); |
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} |
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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) { if (!is_valid_nodemask(nodes)) 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) { if (!nodes_empty(*nodes)) 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, enum mpol_rebind_step step) |
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{ } |
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/* * step: * MPOL_REBIND_ONCE - do rebind work at once * MPOL_REBIND_STEP1 - set all the newly nodes * MPOL_REBIND_STEP2 - clean all the disallowed nodes */ static void mpol_rebind_nodemask(struct mempolicy *pol, const nodemask_t *nodes, enum mpol_rebind_step step) |
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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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/* * if step == 1, we use ->w.cpuset_mems_allowed to cache the * result */ if (step == MPOL_REBIND_ONCE || step == MPOL_REBIND_STEP1) { nodes_remap(tmp, pol->v.nodes, pol->w.cpuset_mems_allowed, *nodes); pol->w.cpuset_mems_allowed = step ? tmp : *nodes; } else if (step == MPOL_REBIND_STEP2) { tmp = pol->w.cpuset_mems_allowed; pol->w.cpuset_mems_allowed = *nodes; } else BUG(); |
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} |
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|
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if (nodes_empty(tmp)) tmp = *nodes; if (step == MPOL_REBIND_STEP1) nodes_or(pol->v.nodes, pol->v.nodes, tmp); else if (step == MPOL_REBIND_ONCE || step == MPOL_REBIND_STEP2) pol->v.nodes = tmp; else BUG(); |
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if (!node_isset(current->il_next, tmp)) { current->il_next = next_node(current->il_next, tmp); if (current->il_next >= MAX_NUMNODES) current->il_next = first_node(tmp); if (current->il_next >= MAX_NUMNODES) current->il_next = numa_node_id(); } } static void mpol_rebind_preferred(struct mempolicy *pol, |
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const nodemask_t *nodes, enum mpol_rebind_step step) |
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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 * * If read-side task has no lock to protect task->mempolicy, write-side * task will rebind the task->mempolicy by two step. The first step is * setting all the newly nodes, and the second step is cleaning all the * disallowed nodes. In this way, we can avoid finding no node to alloc * page. * If we have a lock to protect task->mempolicy in read-side, we do * rebind directly. * * step: * MPOL_REBIND_ONCE - do rebind work at once * MPOL_REBIND_STEP1 - set all the newly nodes * MPOL_REBIND_STEP2 - clean all the disallowed nodes */ static void mpol_rebind_policy(struct mempolicy *pol, const nodemask_t *newmask, enum mpol_rebind_step step) |
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{ |
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if (!pol) return; |
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if (!mpol_store_user_nodemask(pol) && step == MPOL_REBIND_ONCE && |
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nodes_equal(pol->w.cpuset_mems_allowed, *newmask)) return; |
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if (step == MPOL_REBIND_STEP1 && (pol->flags & MPOL_F_REBINDING)) return; if (step == MPOL_REBIND_STEP2 && !(pol->flags & MPOL_F_REBINDING)) BUG(); if (step == MPOL_REBIND_STEP1) pol->flags |= MPOL_F_REBINDING; else if (step == MPOL_REBIND_STEP2) pol->flags &= ~MPOL_F_REBINDING; else if (step >= MPOL_REBIND_NSTEP) BUG(); mpol_ops[pol->mode].rebind(pol, newmask, step); |
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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, enum mpol_rebind_step step) |
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{ |
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mpol_rebind_policy(tsk->mempolicy, new, step); |
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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, MPOL_REBIND_ONCE); |
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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 void migrate_page_add(struct page *page, struct list_head *pagelist, unsigned long flags); |
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|
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/* Scan through pages checking if pages follow certain conditions. */ |
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static int check_pte_range(struct vm_area_struct *vma, pmd_t *pmd, |
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unsigned long addr, unsigned long end, const nodemask_t *nodes, unsigned long flags, |
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void *private) |
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{ |
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pte_t *orig_pte; pte_t *pte; |
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spinlock_t *ptl; |
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|
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orig_pte = pte = pte_offset_map_lock(vma->vm_mm, pmd, addr, &ptl); |
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do { |
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469 |
struct page *page; |
25ba77c14 [PATCH] numa node... |
470 |
int nid; |
91612e0df [PATCH] mbind: ch... |
471 472 |
if (!pte_present(*pte)) |
1da177e4c Linux-2.6.12-rc2 |
473 |
continue; |
6aab341e0 mm: re-architect ... |
474 475 |
page = vm_normal_page(vma, addr, *pte); if (!page) |
1da177e4c Linux-2.6.12-rc2 |
476 |
continue; |
053837fce [PATCH] mm: migra... |
477 |
/* |
62b61f611 ksm: memory hotre... |
478 479 |
* vm_normal_page() filters out zero pages, but there might * still be PageReserved pages to skip, perhaps in a VDSO. |
053837fce [PATCH] mm: migra... |
480 |
*/ |
b79bc0a0c ksm: enable KSM p... |
481 |
if (PageReserved(page)) |
f4598c8b3 [PATCH] migration... |
482 |
continue; |
6aab341e0 mm: re-architect ... |
483 |
nid = page_to_nid(page); |
38e35860d [PATCH] mempolici... |
484 485 |
if (node_isset(nid, *nodes) == !!(flags & MPOL_MF_INVERT)) continue; |
b1f72d185 mm: remove MPOL_M... |
486 |
if (flags & (MPOL_MF_MOVE | MPOL_MF_MOVE_ALL)) |
fc3012896 [PATCH] Simplify ... |
487 |
migrate_page_add(page, private, flags); |
38e35860d [PATCH] mempolici... |
488 489 |
else break; |
91612e0df [PATCH] mbind: ch... |
490 |
} while (pte++, addr += PAGE_SIZE, addr != end); |
705e87c0c [PATCH] mm: pte_o... |
491 |
pte_unmap_unlock(orig_pte, ptl); |
91612e0df [PATCH] mbind: ch... |
492 493 |
return addr != end; } |
b5810039a [PATCH] core remo... |
494 |
static inline int check_pmd_range(struct vm_area_struct *vma, pud_t *pud, |
dc9aa5b9d [PATCH] Swap Migr... |
495 496 |
unsigned long addr, unsigned long end, const nodemask_t *nodes, unsigned long flags, |
38e35860d [PATCH] mempolici... |
497 |
void *private) |
91612e0df [PATCH] mbind: ch... |
498 499 500 501 502 503 504 |
{ pmd_t *pmd; unsigned long next; pmd = pmd_offset(pud, addr); do { next = pmd_addr_end(addr, end); |
e180377f1 thp: change split... |
505 |
split_huge_page_pmd(vma, addr, pmd); |
1a5a9906d mm: thp: fix pmd_... |
506 |
if (pmd_none_or_trans_huge_or_clear_bad(pmd)) |
91612e0df [PATCH] mbind: ch... |
507 |
continue; |
dc9aa5b9d [PATCH] Swap Migr... |
508 |
if (check_pte_range(vma, pmd, addr, next, nodes, |
38e35860d [PATCH] mempolici... |
509 |
flags, private)) |
91612e0df [PATCH] mbind: ch... |
510 511 512 513 |
return -EIO; } while (pmd++, addr = next, addr != end); return 0; } |
b5810039a [PATCH] core remo... |
514 |
static inline int check_pud_range(struct vm_area_struct *vma, pgd_t *pgd, |
dc9aa5b9d [PATCH] Swap Migr... |
515 516 |
unsigned long addr, unsigned long end, const nodemask_t *nodes, unsigned long flags, |
38e35860d [PATCH] mempolici... |
517 |
void *private) |
91612e0df [PATCH] mbind: ch... |
518 519 520 521 522 523 524 525 526 |
{ pud_t *pud; unsigned long next; pud = pud_offset(pgd, addr); do { next = pud_addr_end(addr, end); if (pud_none_or_clear_bad(pud)) continue; |
dc9aa5b9d [PATCH] Swap Migr... |
527 |
if (check_pmd_range(vma, pud, addr, next, nodes, |
38e35860d [PATCH] mempolici... |
528 |
flags, private)) |
91612e0df [PATCH] mbind: ch... |
529 530 531 532 |
return -EIO; } while (pud++, addr = next, addr != end); return 0; } |
b5810039a [PATCH] core remo... |
533 |
static inline int check_pgd_range(struct vm_area_struct *vma, |
dc9aa5b9d [PATCH] Swap Migr... |
534 535 |
unsigned long addr, unsigned long end, const nodemask_t *nodes, unsigned long flags, |
38e35860d [PATCH] mempolici... |
536 |
void *private) |
91612e0df [PATCH] mbind: ch... |
537 538 539 |
{ pgd_t *pgd; unsigned long next; |
b5810039a [PATCH] core remo... |
540 |
pgd = pgd_offset(vma->vm_mm, addr); |
91612e0df [PATCH] mbind: ch... |
541 542 543 544 |
do { next = pgd_addr_end(addr, end); if (pgd_none_or_clear_bad(pgd)) continue; |
dc9aa5b9d [PATCH] Swap Migr... |
545 |
if (check_pud_range(vma, pgd, addr, next, nodes, |
38e35860d [PATCH] mempolici... |
546 |
flags, private)) |
91612e0df [PATCH] mbind: ch... |
547 548 549 |
return -EIO; } while (pgd++, addr = next, addr != end); return 0; |
1da177e4c Linux-2.6.12-rc2 |
550 |
} |
b24f53a0b mm: mempolicy: Ad... |
551 552 |
#ifdef CONFIG_ARCH_USES_NUMA_PROT_NONE /* |
4b10e7d56 mm: mempolicy: Im... |
553 554 555 556 557 558 559 |
* 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... |
560 |
*/ |
4b10e7d56 mm: mempolicy: Im... |
561 562 |
unsigned long change_prot_numa(struct vm_area_struct *vma, unsigned long addr, unsigned long end) |
b24f53a0b mm: mempolicy: Ad... |
563 |
{ |
4b10e7d56 mm: mempolicy: Im... |
564 565 |
int nr_updated; BUILD_BUG_ON(_PAGE_NUMA != _PAGE_PROTNONE); |
b24f53a0b mm: mempolicy: Ad... |
566 |
|
4b10e7d56 mm: mempolicy: Im... |
567 |
nr_updated = change_protection(vma, addr, end, vma->vm_page_prot, 0, 1); |
03c5a6e16 mm: numa: Add pte... |
568 569 |
if (nr_updated) count_vm_numa_events(NUMA_PTE_UPDATES, nr_updated); |
b24f53a0b mm: mempolicy: Ad... |
570 |
|
4b10e7d56 mm: mempolicy: Im... |
571 |
return nr_updated; |
b24f53a0b mm: mempolicy: Ad... |
572 573 574 575 576 577 578 579 |
} #else static unsigned long change_prot_numa(struct vm_area_struct *vma, unsigned long addr, unsigned long end) { return 0; } #endif /* CONFIG_ARCH_USES_NUMA_PROT_NONE */ |
dc9aa5b9d [PATCH] Swap Migr... |
580 581 582 583 584 |
/* * Check if all pages in a range are on a set of nodes. * If pagelist != NULL then isolate pages from the LRU and * put them on the pagelist. */ |
1da177e4c Linux-2.6.12-rc2 |
585 586 |
static struct vm_area_struct * check_range(struct mm_struct *mm, unsigned long start, unsigned long end, |
38e35860d [PATCH] mempolici... |
587 |
const nodemask_t *nodes, unsigned long flags, void *private) |
1da177e4c Linux-2.6.12-rc2 |
588 589 590 |
{ int err; struct vm_area_struct *first, *vma, *prev; |
053837fce [PATCH] mm: migra... |
591 |
|
1da177e4c Linux-2.6.12-rc2 |
592 593 594 595 596 |
first = find_vma(mm, start); if (!first) return ERR_PTR(-EFAULT); prev = NULL; for (vma = first; vma && vma->vm_start < end; vma = vma->vm_next) { |
b24f53a0b mm: mempolicy: Ad... |
597 598 599 600 601 602 |
unsigned long endvma = vma->vm_end; if (endvma > end) endvma = end; if (vma->vm_start > start) start = vma->vm_start; |
dc9aa5b9d [PATCH] Swap Migr... |
603 604 605 606 607 608 |
if (!(flags & MPOL_MF_DISCONTIG_OK)) { if (!vma->vm_next && vma->vm_end < end) return ERR_PTR(-EFAULT); if (prev && prev->vm_end < vma->vm_start) return ERR_PTR(-EFAULT); } |
b24f53a0b mm: mempolicy: Ad... |
609 610 611 612 613 614 615 616 617 618 |
if (is_vm_hugetlb_page(vma)) goto next; if (flags & MPOL_MF_LAZY) { change_prot_numa(vma, start, endvma); goto next; } if ((flags & MPOL_MF_STRICT) || |
dc9aa5b9d [PATCH] Swap Migr... |
619 |
((flags & (MPOL_MF_MOVE | MPOL_MF_MOVE_ALL)) && |
b24f53a0b mm: mempolicy: Ad... |
620 |
vma_migratable(vma))) { |
dc9aa5b9d [PATCH] Swap Migr... |
621 |
|
dc9aa5b9d [PATCH] Swap Migr... |
622 |
err = check_pgd_range(vma, start, endvma, nodes, |
38e35860d [PATCH] mempolici... |
623 |
flags, private); |
1da177e4c Linux-2.6.12-rc2 |
624 625 626 627 628 |
if (err) { first = ERR_PTR(err); break; } } |
b24f53a0b mm: mempolicy: Ad... |
629 |
next: |
1da177e4c Linux-2.6.12-rc2 |
630 631 632 633 |
prev = vma; } return first; } |
869833f2c mempolicy: remove... |
634 635 636 637 638 639 |
/* * 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... |
640 |
{ |
869833f2c mempolicy: remove... |
641 642 643 |
int err; struct mempolicy *old; struct mempolicy *new; |
8d34694c1 revert "mm: mempo... |
644 645 646 647 648 649 |
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... |
650 651 652 653 654 |
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... |
655 |
err = vma->vm_ops->set_policy(vma, new); |
869833f2c mempolicy: remove... |
656 657 |
if (err) goto err_out; |
8d34694c1 revert "mm: mempo... |
658 |
} |
869833f2c mempolicy: remove... |
659 660 661 662 663 664 665 666 |
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... |
667 668 |
return err; } |
1da177e4c Linux-2.6.12-rc2 |
669 |
/* Step 2: apply policy to a range and do splits. */ |
9d8cebd4b mm: fix mbind vma... |
670 671 |
static int mbind_range(struct mm_struct *mm, unsigned long start, unsigned long end, struct mempolicy *new_pol) |
1da177e4c Linux-2.6.12-rc2 |
672 673 |
{ struct vm_area_struct *next; |
9d8cebd4b mm: fix mbind vma... |
674 675 676 |
struct vm_area_struct *prev; struct vm_area_struct *vma; int err = 0; |
e26a51148 mm/mempolicy.c: r... |
677 |
pgoff_t pgoff; |
9d8cebd4b mm: fix mbind vma... |
678 679 |
unsigned long vmstart; unsigned long vmend; |
1da177e4c Linux-2.6.12-rc2 |
680 |
|
097d59106 vm: avoid using f... |
681 |
vma = find_vma(mm, start); |
9d8cebd4b mm: fix mbind vma... |
682 683 |
if (!vma || vma->vm_start > start) return -EFAULT; |
097d59106 vm: avoid using f... |
684 |
prev = vma->vm_prev; |
e26a51148 mm/mempolicy.c: r... |
685 686 |
if (start > vma->vm_start) prev = vma; |
9d8cebd4b mm: fix mbind vma... |
687 |
for (; vma && vma->vm_start < end; prev = vma, vma = next) { |
1da177e4c Linux-2.6.12-rc2 |
688 |
next = vma->vm_next; |
9d8cebd4b mm: fix mbind vma... |
689 690 |
vmstart = max(start, vma->vm_start); vmend = min(end, vma->vm_end); |
e26a51148 mm/mempolicy.c: r... |
691 692 693 694 695 |
if (mpol_equal(vma_policy(vma), new_pol)) continue; pgoff = vma->vm_pgoff + ((vmstart - vma->vm_start) >> PAGE_SHIFT); |
9d8cebd4b mm: fix mbind vma... |
696 |
prev = vma_merge(mm, prev, vmstart, vmend, vma->vm_flags, |
e26a51148 mm/mempolicy.c: r... |
697 |
vma->anon_vma, vma->vm_file, pgoff, |
8aacc9f55 mm/mempolicy.c: f... |
698 |
new_pol); |
9d8cebd4b mm: fix mbind vma... |
699 700 701 |
if (prev) { vma = prev; next = vma->vm_next; |
0bd6f78c3 mm: mempolicy: fi... |
702 703 704 705 |
if (mpol_equal(vma_policy(vma), new_pol)) continue; /* vma_merge() joined vma && vma->next, case 8 */ goto replace; |
9d8cebd4b mm: fix mbind vma... |
706 707 708 709 710 711 712 713 714 715 716 |
} 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; } |
0bd6f78c3 mm: mempolicy: fi... |
717 |
replace: |
869833f2c mempolicy: remove... |
718 |
err = vma_replace_policy(vma, new_pol); |
8d34694c1 revert "mm: mempo... |
719 720 |
if (err) goto out; |
1da177e4c Linux-2.6.12-rc2 |
721 |
} |
9d8cebd4b mm: fix mbind vma... |
722 723 |
out: |
1da177e4c Linux-2.6.12-rc2 |
724 725 |
return err; } |
c61afb181 [PATCH] cpuset me... |
726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 |
/* * Update task->flags PF_MEMPOLICY bit: set iff non-default * mempolicy. Allows more rapid checking of this (combined perhaps * with other PF_* flag bits) on memory allocation hot code paths. * * If called from outside this file, the task 'p' should -only- be * a newly forked child not yet visible on the task list, because * manipulating the task flags of a visible task is not safe. * * The above limitation is why this routine has the funny name * mpol_fix_fork_child_flag(). * * It is also safe to call this with a task pointer of current, * which the static wrapper mpol_set_task_struct_flag() does, * for use within this file. */ void mpol_fix_fork_child_flag(struct task_struct *p) { if (p->mempolicy) p->flags |= PF_MEMPOLICY; else p->flags &= ~PF_MEMPOLICY; } static void mpol_set_task_struct_flag(void) { mpol_fix_fork_child_flag(current); } |
1da177e4c Linux-2.6.12-rc2 |
755 |
/* Set the process memory policy */ |
028fec414 mempolicy: suppor... |
756 757 |
static long do_set_mempolicy(unsigned short mode, unsigned short flags, nodemask_t *nodes) |
1da177e4c Linux-2.6.12-rc2 |
758 |
{ |
58568d2a8 cpuset,mm: update... |
759 |
struct mempolicy *new, *old; |
f4e53d910 mempolicy: write ... |
760 |
struct mm_struct *mm = current->mm; |
4bfc44958 mm: make set_memp... |
761 |
NODEMASK_SCRATCH(scratch); |
58568d2a8 cpuset,mm: update... |
762 |
int ret; |
1da177e4c Linux-2.6.12-rc2 |
763 |
|
4bfc44958 mm: make set_memp... |
764 765 |
if (!scratch) return -ENOMEM; |
f4e53d910 mempolicy: write ... |
766 |
|
4bfc44958 mm: make set_memp... |
767 768 769 770 771 |
new = mpol_new(mode, flags, nodes); if (IS_ERR(new)) { ret = PTR_ERR(new); goto out; } |
f4e53d910 mempolicy: write ... |
772 773 774 775 776 777 778 779 |
/* * prevent changing our mempolicy while show_numa_maps() * is using it. * Note: do_set_mempolicy() can be called at init time * with no 'mm'. */ if (mm) down_write(&mm->mmap_sem); |
58568d2a8 cpuset,mm: update... |
780 |
task_lock(current); |
4bfc44958 mm: make set_memp... |
781 |
ret = mpol_set_nodemask(new, nodes, scratch); |
58568d2a8 cpuset,mm: update... |
782 783 784 785 786 |
if (ret) { task_unlock(current); if (mm) up_write(&mm->mmap_sem); mpol_put(new); |
4bfc44958 mm: make set_memp... |
787 |
goto out; |
58568d2a8 cpuset,mm: update... |
788 789 |
} old = current->mempolicy; |
1da177e4c Linux-2.6.12-rc2 |
790 |
current->mempolicy = new; |
c61afb181 [PATCH] cpuset me... |
791 |
mpol_set_task_struct_flag(); |
45c4745af mempolicy: rename... |
792 |
if (new && new->mode == MPOL_INTERLEAVE && |
f5b087b52 mempolicy: add MP... |
793 |
nodes_weight(new->v.nodes)) |
dfcd3c0dc [PATCH] Convert m... |
794 |
current->il_next = first_node(new->v.nodes); |
58568d2a8 cpuset,mm: update... |
795 |
task_unlock(current); |
f4e53d910 mempolicy: write ... |
796 797 |
if (mm) up_write(&mm->mmap_sem); |
58568d2a8 cpuset,mm: update... |
798 |
mpol_put(old); |
4bfc44958 mm: make set_memp... |
799 800 801 802 |
ret = 0; out: NODEMASK_SCRATCH_FREE(scratch); return ret; |
1da177e4c Linux-2.6.12-rc2 |
803 |
} |
bea904d54 mempolicy: use MP... |
804 805 |
/* * Return nodemask for policy for get_mempolicy() query |
58568d2a8 cpuset,mm: update... |
806 807 |
* * Called with task's alloc_lock held |
bea904d54 mempolicy: use MP... |
808 809 |
*/ static void get_policy_nodemask(struct mempolicy *p, nodemask_t *nodes) |
1da177e4c Linux-2.6.12-rc2 |
810 |
{ |
dfcd3c0dc [PATCH] Convert m... |
811 |
nodes_clear(*nodes); |
bea904d54 mempolicy: use MP... |
812 813 |
if (p == &default_policy) return; |
45c4745af mempolicy: rename... |
814 |
switch (p->mode) { |
19770b326 mm: filter based ... |
815 816 |
case MPOL_BIND: /* Fall through */ |
1da177e4c Linux-2.6.12-rc2 |
817 |
case MPOL_INTERLEAVE: |
dfcd3c0dc [PATCH] Convert m... |
818 |
*nodes = p->v.nodes; |
1da177e4c Linux-2.6.12-rc2 |
819 820 |
break; case MPOL_PREFERRED: |
fc36b8d3d mempolicy: use MP... |
821 |
if (!(p->flags & MPOL_F_LOCAL)) |
dfcd3c0dc [PATCH] Convert m... |
822 |
node_set(p->v.preferred_node, *nodes); |
53f2556b6 mempolicy: mPOL_P... |
823 |
/* else return empty node mask for local allocation */ |
1da177e4c Linux-2.6.12-rc2 |
824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 |
break; default: BUG(); } } static int lookup_node(struct mm_struct *mm, unsigned long addr) { struct page *p; int err; err = get_user_pages(current, mm, addr & PAGE_MASK, 1, 0, 0, &p, NULL); if (err >= 0) { err = page_to_nid(p); put_page(p); } return err; } |
1da177e4c Linux-2.6.12-rc2 |
842 |
/* Retrieve NUMA policy */ |
dbcb0f19c mm/mempolicy.c: c... |
843 844 |
static long do_get_mempolicy(int *policy, nodemask_t *nmask, unsigned long addr, unsigned long flags) |
1da177e4c Linux-2.6.12-rc2 |
845 |
{ |
8bccd85ff [PATCH] Implement... |
846 |
int err; |
1da177e4c Linux-2.6.12-rc2 |
847 848 849 |
struct mm_struct *mm = current->mm; struct vm_area_struct *vma = NULL; struct mempolicy *pol = current->mempolicy; |
754af6f5a Mem Policy: add M... |
850 851 |
if (flags & ~(unsigned long)(MPOL_F_NODE|MPOL_F_ADDR|MPOL_F_MEMS_ALLOWED)) |
1da177e4c Linux-2.6.12-rc2 |
852 |
return -EINVAL; |
754af6f5a Mem Policy: add M... |
853 854 855 856 857 |
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... |
858 |
task_lock(current); |
754af6f5a Mem Policy: add M... |
859 |
*nmask = cpuset_current_mems_allowed; |
58568d2a8 cpuset,mm: update... |
860 |
task_unlock(current); |
754af6f5a Mem Policy: add M... |
861 862 |
return 0; } |
1da177e4c Linux-2.6.12-rc2 |
863 |
if (flags & MPOL_F_ADDR) { |
bea904d54 mempolicy: use MP... |
864 865 866 867 868 |
/* * 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 |
869 870 871 872 873 874 875 876 877 878 879 880 881 882 |
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... |
883 |
pol = &default_policy; /* indicates default behavior */ |
1da177e4c Linux-2.6.12-rc2 |
884 885 886 887 888 889 |
if (flags & MPOL_F_NODE) { if (flags & MPOL_F_ADDR) { err = lookup_node(mm, addr); if (err < 0) goto out; |
8bccd85ff [PATCH] Implement... |
890 |
*policy = err; |
1da177e4c Linux-2.6.12-rc2 |
891 |
} else if (pol == current->mempolicy && |
45c4745af mempolicy: rename... |
892 |
pol->mode == MPOL_INTERLEAVE) { |
8bccd85ff [PATCH] Implement... |
893 |
*policy = current->il_next; |
1da177e4c Linux-2.6.12-rc2 |
894 895 896 897 |
} else { err = -EINVAL; goto out; } |
bea904d54 mempolicy: use MP... |
898 899 900 |
} else { *policy = pol == &default_policy ? MPOL_DEFAULT : pol->mode; |
d79df630f mempolicy: mask o... |
901 902 903 904 905 |
/* * Internal mempolicy flags must be masked off before exposing * the policy to userspace. */ *policy |= (pol->flags & MPOL_MODE_FLAGS); |
bea904d54 mempolicy: use MP... |
906 |
} |
1da177e4c Linux-2.6.12-rc2 |
907 908 909 910 911 |
if (vma) { up_read(¤t->mm->mmap_sem); vma = NULL; } |
1da177e4c Linux-2.6.12-rc2 |
912 |
err = 0; |
58568d2a8 cpuset,mm: update... |
913 |
if (nmask) { |
c6b6ef8bb mempolicy: fix ge... |
914 915 916 917 918 919 920 |
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... |
921 |
} |
1da177e4c Linux-2.6.12-rc2 |
922 923 |
out: |
52cd3b074 mempolicy: rework... |
924 |
mpol_cond_put(pol); |
1da177e4c Linux-2.6.12-rc2 |
925 926 927 928 |
if (vma) up_read(¤t->mm->mmap_sem); return err; } |
b20a35035 [PATCH] page migr... |
929 |
#ifdef CONFIG_MIGRATION |
8bccd85ff [PATCH] Implement... |
930 |
/* |
6ce3c4c0f [PATCH] Move page... |
931 932 |
* page migration */ |
fc3012896 [PATCH] Simplify ... |
933 934 |
static void migrate_page_add(struct page *page, struct list_head *pagelist, unsigned long flags) |
6ce3c4c0f [PATCH] Move page... |
935 936 |
{ /* |
fc3012896 [PATCH] Simplify ... |
937 |
* Avoid migrating a page that is shared with others. |
6ce3c4c0f [PATCH] Move page... |
938 |
*/ |
62695a84e vmscan: move isol... |
939 940 941 |
if ((flags & MPOL_MF_MOVE_ALL) || page_mapcount(page) == 1) { if (!isolate_lru_page(page)) { list_add_tail(&page->lru, pagelist); |
6d9c285a6 mm: move inc_zone... |
942 943 |
inc_zone_page_state(page, NR_ISOLATED_ANON + page_is_file_cache(page)); |
62695a84e vmscan: move isol... |
944 945 |
} } |
7e2ab150d [PATCH] Direct Mi... |
946 |
} |
6ce3c4c0f [PATCH] Move page... |
947 |
|
742755a1d [PATCH] page migr... |
948 |
static struct page *new_node_page(struct page *page, unsigned long node, int **x) |
95a402c38 [PATCH] page migr... |
949 |
{ |
6484eb3e2 page allocator: d... |
950 |
return alloc_pages_exact_node(node, GFP_HIGHUSER_MOVABLE, 0); |
95a402c38 [PATCH] page migr... |
951 |
} |
7e2ab150d [PATCH] Direct Mi... |
952 953 954 955 |
/* * Migrate pages from one node to a target node. * Returns error or the number of pages not migrated. */ |
dbcb0f19c mm/mempolicy.c: c... |
956 957 |
static int migrate_to_node(struct mm_struct *mm, int source, int dest, int flags) |
7e2ab150d [PATCH] Direct Mi... |
958 959 960 961 962 963 964 |
{ nodemask_t nmask; LIST_HEAD(pagelist); int err = 0; nodes_clear(nmask); node_set(source, nmask); |
6ce3c4c0f [PATCH] Move page... |
965 |
|
082708072 mm: revert 0def08... |
966 967 968 969 970 971 972 |
/* * 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))); check_range(mm, mm->mmap->vm_start, mm->task_size, &nmask, |
7e2ab150d [PATCH] Direct Mi... |
973 |
flags | MPOL_MF_DISCONTIG_OK, &pagelist); |
cf608ac19 mm: compaction: f... |
974 |
if (!list_empty(&pagelist)) { |
7f0f24967 mm: migration: cl... |
975 |
err = migrate_pages(&pagelist, new_node_page, dest, |
9c620e2bc mm: remove offlin... |
976 |
MIGRATE_SYNC, MR_SYSCALL); |
cf608ac19 mm: compaction: f... |
977 978 979 |
if (err) putback_lru_pages(&pagelist); } |
95a402c38 [PATCH] page migr... |
980 |
|
7e2ab150d [PATCH] Direct Mi... |
981 |
return err; |
6ce3c4c0f [PATCH] Move page... |
982 983 984 |
} /* |
7e2ab150d [PATCH] Direct Mi... |
985 986 |
* Move pages between the two nodesets so as to preserve the physical * layout as much as possible. |
39743889a [PATCH] Swap Migr... |
987 988 989 |
* * Returns the number of page that could not be moved. */ |
0ce72d4f7 mm: do_migrate_pa... |
990 991 |
int do_migrate_pages(struct mm_struct *mm, const nodemask_t *from, const nodemask_t *to, int flags) |
39743889a [PATCH] Swap Migr... |
992 |
{ |
7e2ab150d [PATCH] Direct Mi... |
993 |
int busy = 0; |
0aedadf91 mm: move migrate_... |
994 |
int err; |
7e2ab150d [PATCH] Direct Mi... |
995 |
nodemask_t tmp; |
39743889a [PATCH] Swap Migr... |
996 |
|
0aedadf91 mm: move migrate_... |
997 998 999 |
err = migrate_prep(); if (err) return err; |
53f2556b6 mempolicy: mPOL_P... |
1000 |
down_read(&mm->mmap_sem); |
39743889a [PATCH] Swap Migr... |
1001 |
|
0ce72d4f7 mm: do_migrate_pa... |
1002 |
err = migrate_vmas(mm, from, to, flags); |
7b2259b3e [PATCH] page migr... |
1003 1004 |
if (err) goto out; |
da0aa1389 mm/mempolicy.c: f... |
1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 |
/* * 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... |
1030 |
* Otherwise when we finish scanning from_tmp, we at least have the |
da0aa1389 mm/mempolicy.c: f... |
1031 1032 1033 1034 |
* 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: ... |
1035 |
|
0ce72d4f7 mm: do_migrate_pa... |
1036 |
tmp = *from; |
7e2ab150d [PATCH] Direct Mi... |
1037 1038 1039 1040 1041 1042 |
while (!nodes_empty(tmp)) { int s,d; int source = -1; int dest = 0; for_each_node_mask(s, tmp) { |
4a5b18cc1 mm: do_migrate_pa... |
1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 |
/* * 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... |
1058 1059 |
if ((nodes_weight(*from) != nodes_weight(*to)) && (node_isset(s, *to))) |
4a5b18cc1 mm: do_migrate_pa... |
1060 |
continue; |
0ce72d4f7 mm: do_migrate_pa... |
1061 |
d = node_remap(s, *from, *to); |
7e2ab150d [PATCH] Direct Mi... |
1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 |
if (s == d) continue; source = s; /* Node moved. Memorize */ dest = d; /* dest not in remaining from nodes? */ if (!node_isset(dest, tmp)) break; } if (source == -1) 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... |
1081 |
} |
7b2259b3e [PATCH] page migr... |
1082 |
out: |
39743889a [PATCH] Swap Migr... |
1083 |
up_read(&mm->mmap_sem); |
7e2ab150d [PATCH] Direct Mi... |
1084 1085 1086 |
if (err < 0) return err; return busy; |
b20a35035 [PATCH] page migr... |
1087 1088 |
} |
3ad33b243 Migration: find c... |
1089 1090 1091 1092 1093 1094 1095 |
/* * Allocate a new page for page migration based on vma policy. * Start assuming that page is mapped by vma pointed to by @private. * 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. */ |
742755a1d [PATCH] page migr... |
1096 |
static struct page *new_vma_page(struct page *page, unsigned long private, int **x) |
95a402c38 [PATCH] page migr... |
1097 1098 |
{ struct vm_area_struct *vma = (struct vm_area_struct *)private; |
3ad33b243 Migration: find c... |
1099 |
unsigned long uninitialized_var(address); |
95a402c38 [PATCH] page migr... |
1100 |
|
3ad33b243 Migration: find c... |
1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 |
while (vma) { address = page_address_in_vma(page, vma); if (address != -EFAULT) break; vma = vma->vm_next; } /* * if !vma, alloc_page_vma() will use task or system default policy */ return alloc_page_vma(GFP_HIGHUSER_MOVABLE, vma, address); |
95a402c38 [PATCH] page migr... |
1112 |
} |
b20a35035 [PATCH] page migr... |
1113 1114 1115 1116 1117 |
#else static void migrate_page_add(struct page *page, struct list_head *pagelist, unsigned long flags) { |
39743889a [PATCH] Swap Migr... |
1118 |
} |
0ce72d4f7 mm: do_migrate_pa... |
1119 1120 |
int do_migrate_pages(struct mm_struct *mm, const nodemask_t *from, const nodemask_t *to, int flags) |
b20a35035 [PATCH] page migr... |
1121 1122 1123 |
{ return -ENOSYS; } |
95a402c38 [PATCH] page migr... |
1124 |
|
699397499 [PATCH] Fix do_mb... |
1125 |
static struct page *new_vma_page(struct page *page, unsigned long private, int **x) |
95a402c38 [PATCH] page migr... |
1126 1127 1128 |
{ return NULL; } |
b20a35035 [PATCH] page migr... |
1129 |
#endif |
dbcb0f19c mm/mempolicy.c: c... |
1130 |
static long do_mbind(unsigned long start, unsigned long len, |
028fec414 mempolicy: suppor... |
1131 1132 |
unsigned short mode, unsigned short mode_flags, nodemask_t *nmask, unsigned long flags) |
6ce3c4c0f [PATCH] Move page... |
1133 1134 1135 1136 1137 1138 1139 |
{ struct vm_area_struct *vma; struct mm_struct *mm = current->mm; struct mempolicy *new; unsigned long end; int err; LIST_HEAD(pagelist); |
b24f53a0b mm: mempolicy: Ad... |
1140 |
if (flags & ~(unsigned long)MPOL_MF_VALID) |
6ce3c4c0f [PATCH] Move page... |
1141 |
return -EINVAL; |
74c002410 [PATCH] Consisten... |
1142 |
if ((flags & MPOL_MF_MOVE_ALL) && !capable(CAP_SYS_NICE)) |
6ce3c4c0f [PATCH] Move page... |
1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 |
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... |
1158 |
new = mpol_new(mode, mode_flags, nmask); |
6ce3c4c0f [PATCH] Move page... |
1159 1160 |
if (IS_ERR(new)) return PTR_ERR(new); |
b24f53a0b mm: mempolicy: Ad... |
1161 1162 |
if (flags & MPOL_MF_LAZY) new->flags |= MPOL_F_MOF; |
6ce3c4c0f [PATCH] Move page... |
1163 1164 1165 1166 1167 1168 |
/* * 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... |
1169 1170 1171 |
pr_debug("mbind %lx-%lx mode:%d flags:%d nodes:%lx ", start, start + len, mode, mode_flags, |
00ef2d2f8 mm: use NUMA_NO_NODE |
1172 |
nmask ? nodes_addr(*nmask)[0] : NUMA_NO_NODE); |
6ce3c4c0f [PATCH] Move page... |
1173 |
|
0aedadf91 mm: move migrate_... |
1174 1175 1176 1177 |
if (flags & (MPOL_MF_MOVE | MPOL_MF_MOVE_ALL)) { err = migrate_prep(); if (err) |
b05ca7385 do_mbind(): fix m... |
1178 |
goto mpol_out; |
0aedadf91 mm: move migrate_... |
1179 |
} |
4bfc44958 mm: make set_memp... |
1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 |
{ 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... |
1193 1194 |
if (err) goto mpol_out; |
6ce3c4c0f [PATCH] Move page... |
1195 1196 |
vma = check_range(mm, start, end, nmask, flags | MPOL_MF_INVERT, &pagelist); |
b24f53a0b mm: mempolicy: Ad... |
1197 |
err = PTR_ERR(vma); /* maybe ... */ |
a720094de mm: mempolicy: Hi... |
1198 |
if (!IS_ERR(vma)) |
9d8cebd4b mm: fix mbind vma... |
1199 |
err = mbind_range(mm, start, end, new); |
7e2ab150d [PATCH] Direct Mi... |
1200 |
|
b24f53a0b mm: mempolicy: Ad... |
1201 1202 |
if (!err) { int nr_failed = 0; |
cf608ac19 mm: compaction: f... |
1203 |
if (!list_empty(&pagelist)) { |
b24f53a0b mm: mempolicy: Ad... |
1204 |
WARN_ON_ONCE(flags & MPOL_MF_LAZY); |
95a402c38 [PATCH] page migr... |
1205 |
nr_failed = migrate_pages(&pagelist, new_vma_page, |
9c620e2bc mm: remove offlin... |
1206 1207 |
(unsigned long)vma, MIGRATE_SYNC, MR_MEMPOLICY_MBIND); |
cf608ac19 mm: compaction: f... |
1208 1209 1210 |
if (nr_failed) putback_lru_pages(&pagelist); } |
6ce3c4c0f [PATCH] Move page... |
1211 |
|
b24f53a0b mm: mempolicy: Ad... |
1212 |
if (nr_failed && (flags & MPOL_MF_STRICT)) |
6ce3c4c0f [PATCH] Move page... |
1213 |
err = -EIO; |
ab8a3e14e mbind(): fix leak... |
1214 1215 |
} else putback_lru_pages(&pagelist); |
b20a35035 [PATCH] page migr... |
1216 |
|
6ce3c4c0f [PATCH] Move page... |
1217 |
up_write(&mm->mmap_sem); |
b05ca7385 do_mbind(): fix m... |
1218 |
mpol_out: |
f0be3d32b mempolicy: rename... |
1219 |
mpol_put(new); |
6ce3c4c0f [PATCH] Move page... |
1220 1221 |
return err; } |
39743889a [PATCH] Swap Migr... |
1222 |
/* |
8bccd85ff [PATCH] Implement... |
1223 1224 1225 1226 |
* User space interface with variable sized bitmaps for nodelists. */ /* Copy a node mask from user space. */ |
39743889a [PATCH] Swap Migr... |
1227 |
static int get_nodes(nodemask_t *nodes, const unsigned long __user *nmask, |
8bccd85ff [PATCH] Implement... |
1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 |
unsigned long maxnode) { unsigned long k; unsigned long nlongs; unsigned long endmask; --maxnode; nodes_clear(*nodes); if (maxnode == 0 || !nmask) return 0; |
a9c930bac [PATCH] Fix units... |
1238 |
if (maxnode > PAGE_SIZE*BITS_PER_BYTE) |
636f13c17 [PATCH] sys_mbind... |
1239 |
return -EINVAL; |
8bccd85ff [PATCH] Implement... |
1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 |
nlongs = BITS_TO_LONGS(maxnode); if ((maxnode % BITS_PER_LONG) == 0) endmask = ~0UL; else endmask = (1UL << (maxnode % BITS_PER_LONG)) - 1; /* When the user specified more nodes than supported just check if the non supported part is all zero. */ if (nlongs > BITS_TO_LONGS(MAX_NUMNODES)) { if (nlongs > PAGE_SIZE/sizeof(long)) return -EINVAL; for (k = BITS_TO_LONGS(MAX_NUMNODES); k < nlongs; k++) { unsigned long t; 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; } 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; const int nbytes = BITS_TO_LONGS(MAX_NUMNODES) * sizeof(long); 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; } |
938bb9f5e [CVE-2009-0029] S... |
1288 1289 1290 |
SYSCALL_DEFINE6(mbind, unsigned long, start, unsigned long, len, unsigned long, mode, unsigned long __user *, nmask, unsigned long, maxnode, unsigned, flags) |
8bccd85ff [PATCH] Implement... |
1291 1292 1293 |
{ nodemask_t nodes; int err; |
028fec414 mempolicy: suppor... |
1294 |
unsigned short mode_flags; |
8bccd85ff [PATCH] Implement... |
1295 |
|
028fec414 mempolicy: suppor... |
1296 1297 |
mode_flags = mode & MPOL_MODE_FLAGS; mode &= ~MPOL_MODE_FLAGS; |
a3b51e014 mempolicy: conver... |
1298 1299 |
if (mode >= MPOL_MAX) return -EINVAL; |
4c50bc011 mempolicy: add MP... |
1300 1301 1302 |
if ((mode_flags & MPOL_F_STATIC_NODES) && (mode_flags & MPOL_F_RELATIVE_NODES)) return -EINVAL; |
8bccd85ff [PATCH] Implement... |
1303 1304 1305 |
err = get_nodes(&nodes, nmask, maxnode); if (err) return err; |
028fec414 mempolicy: suppor... |
1306 |
return do_mbind(start, len, mode, mode_flags, &nodes, flags); |
8bccd85ff [PATCH] Implement... |
1307 1308 1309 |
} /* Set the process memory policy */ |
938bb9f5e [CVE-2009-0029] S... |
1310 1311 |
SYSCALL_DEFINE3(set_mempolicy, int, mode, unsigned long __user *, nmask, unsigned long, maxnode) |
8bccd85ff [PATCH] Implement... |
1312 1313 1314 |
{ int err; nodemask_t nodes; |
028fec414 mempolicy: suppor... |
1315 |
unsigned short flags; |
8bccd85ff [PATCH] Implement... |
1316 |
|
028fec414 mempolicy: suppor... |
1317 1318 1319 |
flags = mode & MPOL_MODE_FLAGS; mode &= ~MPOL_MODE_FLAGS; if ((unsigned int)mode >= MPOL_MAX) |
8bccd85ff [PATCH] Implement... |
1320 |
return -EINVAL; |
4c50bc011 mempolicy: add MP... |
1321 1322 |
if ((flags & MPOL_F_STATIC_NODES) && (flags & MPOL_F_RELATIVE_NODES)) return -EINVAL; |
8bccd85ff [PATCH] Implement... |
1323 1324 1325 |
err = get_nodes(&nodes, nmask, maxnode); if (err) return err; |
028fec414 mempolicy: suppor... |
1326 |
return do_set_mempolicy(mode, flags, &nodes); |
8bccd85ff [PATCH] Implement... |
1327 |
} |
938bb9f5e [CVE-2009-0029] S... |
1328 1329 1330 |
SYSCALL_DEFINE4(migrate_pages, pid_t, pid, unsigned long, maxnode, const unsigned long __user *, old_nodes, const unsigned long __user *, new_nodes) |
39743889a [PATCH] Swap Migr... |
1331 |
{ |
c69e8d9c0 CRED: Use RCU to ... |
1332 |
const struct cred *cred = current_cred(), *tcred; |
596d7cfa2 mempolicy: reduce... |
1333 |
struct mm_struct *mm = NULL; |
39743889a [PATCH] Swap Migr... |
1334 |
struct task_struct *task; |
39743889a [PATCH] Swap Migr... |
1335 1336 |
nodemask_t task_nodes; int err; |
596d7cfa2 mempolicy: reduce... |
1337 1338 1339 1340 1341 1342 |
nodemask_t *old; nodemask_t *new; NODEMASK_SCRATCH(scratch); if (!scratch) return -ENOMEM; |
39743889a [PATCH] Swap Migr... |
1343 |
|
596d7cfa2 mempolicy: reduce... |
1344 1345 1346 1347 |
old = &scratch->mask1; new = &scratch->mask2; err = get_nodes(old, old_nodes, maxnode); |
39743889a [PATCH] Swap Migr... |
1348 |
if (err) |
596d7cfa2 mempolicy: reduce... |
1349 |
goto out; |
39743889a [PATCH] Swap Migr... |
1350 |
|
596d7cfa2 mempolicy: reduce... |
1351 |
err = get_nodes(new, new_nodes, maxnode); |
39743889a [PATCH] Swap Migr... |
1352 |
if (err) |
596d7cfa2 mempolicy: reduce... |
1353 |
goto out; |
39743889a [PATCH] Swap Migr... |
1354 1355 |
/* Find the mm_struct */ |
55cfaa3cb mm/mempolicy.c: a... |
1356 |
rcu_read_lock(); |
228ebcbe6 Uninline find_tas... |
1357 |
task = pid ? find_task_by_vpid(pid) : current; |
39743889a [PATCH] Swap Migr... |
1358 |
if (!task) { |
55cfaa3cb mm/mempolicy.c: a... |
1359 |
rcu_read_unlock(); |
596d7cfa2 mempolicy: reduce... |
1360 1361 |
err = -ESRCH; goto out; |
39743889a [PATCH] Swap Migr... |
1362 |
} |
3268c63ed mm: fix move/migr... |
1363 |
get_task_struct(task); |
39743889a [PATCH] Swap Migr... |
1364 |
|
596d7cfa2 mempolicy: reduce... |
1365 |
err = -EINVAL; |
39743889a [PATCH] Swap Migr... |
1366 1367 1368 1369 |
/* * Check if this process has the right to modify the specified * process. The right exists if the process has administrative |
7f927fcc2 [PATCH] Typo fixes |
1370 |
* capabilities, superuser privileges or the same |
39743889a [PATCH] Swap Migr... |
1371 1372 |
* userid as the target process. */ |
c69e8d9c0 CRED: Use RCU to ... |
1373 |
tcred = __task_cred(task); |
b38a86eb1 userns: Convert t... |
1374 1375 |
if (!uid_eq(cred->euid, tcred->suid) && !uid_eq(cred->euid, tcred->uid) && !uid_eq(cred->uid, tcred->suid) && !uid_eq(cred->uid, tcred->uid) && |
74c002410 [PATCH] Consisten... |
1376 |
!capable(CAP_SYS_NICE)) { |
c69e8d9c0 CRED: Use RCU to ... |
1377 |
rcu_read_unlock(); |
39743889a [PATCH] Swap Migr... |
1378 |
err = -EPERM; |
3268c63ed mm: fix move/migr... |
1379 |
goto out_put; |
39743889a [PATCH] Swap Migr... |
1380 |
} |
c69e8d9c0 CRED: Use RCU to ... |
1381 |
rcu_read_unlock(); |
39743889a [PATCH] Swap Migr... |
1382 1383 1384 |
task_nodes = cpuset_mems_allowed(task); /* Is the user allowed to access the target nodes? */ |
596d7cfa2 mempolicy: reduce... |
1385 |
if (!nodes_subset(*new, task_nodes) && !capable(CAP_SYS_NICE)) { |
39743889a [PATCH] Swap Migr... |
1386 |
err = -EPERM; |
3268c63ed mm: fix move/migr... |
1387 |
goto out_put; |
39743889a [PATCH] Swap Migr... |
1388 |
} |
01f13bd60 mempolicy: use N_... |
1389 |
if (!nodes_subset(*new, node_states[N_MEMORY])) { |
3b42d28b2 Page migration: D... |
1390 |
err = -EINVAL; |
3268c63ed mm: fix move/migr... |
1391 |
goto out_put; |
3b42d28b2 Page migration: D... |
1392 |
} |
86c3a7645 [PATCH] SELinux: ... |
1393 1394 |
err = security_task_movememory(task); if (err) |
3268c63ed mm: fix move/migr... |
1395 |
goto out_put; |
86c3a7645 [PATCH] SELinux: ... |
1396 |
|
3268c63ed mm: fix move/migr... |
1397 1398 |
mm = get_task_mm(task); put_task_struct(task); |
f2a9ef880 mm: fix NULL ptr ... |
1399 1400 |
if (!mm) { |
3268c63ed mm: fix move/migr... |
1401 |
err = -EINVAL; |
f2a9ef880 mm: fix NULL ptr ... |
1402 1403 1404 1405 1406 |
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... |
1407 1408 1409 |
mmput(mm); out: |
596d7cfa2 mempolicy: reduce... |
1410 |
NODEMASK_SCRATCH_FREE(scratch); |
39743889a [PATCH] Swap Migr... |
1411 |
return err; |
3268c63ed mm: fix move/migr... |
1412 1413 1414 1415 |
out_put: put_task_struct(task); goto out; |
39743889a [PATCH] Swap Migr... |
1416 |
} |
8bccd85ff [PATCH] Implement... |
1417 |
/* Retrieve NUMA policy */ |
938bb9f5e [CVE-2009-0029] S... |
1418 1419 1420 |
SYSCALL_DEFINE5(get_mempolicy, int __user *, policy, unsigned long __user *, nmask, unsigned long, maxnode, unsigned long, addr, unsigned long, flags) |
8bccd85ff [PATCH] Implement... |
1421 |
{ |
dbcb0f19c mm/mempolicy.c: c... |
1422 1423 |
int err; int uninitialized_var(pval); |
8bccd85ff [PATCH] Implement... |
1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 |
nodemask_t nodes; if (nmask != NULL && maxnode < MAX_NUMNODES) 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; } |
1da177e4c Linux-2.6.12-rc2 |
1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 |
#ifdef CONFIG_COMPAT asmlinkage long compat_sys_get_mempolicy(int __user *policy, compat_ulong_t __user *nmask, compat_ulong_t maxnode, compat_ulong_t addr, compat_ulong_t flags) { long err; 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) nm = compat_alloc_user_space(alloc_size); err = sys_get_mempolicy(policy, nm, nr_bits+1, addr, flags); if (!err && nmask) { |
2bbff6c76 mm/mempolicy.c: m... |
1463 1464 1465 |
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 |
1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 |
/* ensure entire bitmap is zeroed */ err |= clear_user(nmask, ALIGN(maxnode-1, 8) / 8); err |= compat_put_bitmap(nmask, bm, nr_bits); } return err; } asmlinkage long compat_sys_set_mempolicy(int mode, compat_ulong_t __user *nmask, compat_ulong_t maxnode) { long err = 0; 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) { err = compat_get_bitmap(bm, nmask, nr_bits); nm = compat_alloc_user_space(alloc_size); err |= copy_to_user(nm, bm, alloc_size); } if (err) return -EFAULT; return sys_set_mempolicy(mode, nm, nr_bits+1); } asmlinkage long compat_sys_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) { long err = 0; unsigned long __user *nm = NULL; unsigned long nr_bits, alloc_size; |
dfcd3c0dc [PATCH] Convert m... |
1504 |
nodemask_t bm; |
1da177e4c Linux-2.6.12-rc2 |
1505 1506 1507 1508 1509 |
nr_bits = min_t(unsigned long, maxnode-1, MAX_NUMNODES); alloc_size = ALIGN(nr_bits, BITS_PER_LONG) / 8; if (nmask) { |
dfcd3c0dc [PATCH] Convert m... |
1510 |
err = compat_get_bitmap(nodes_addr(bm), nmask, nr_bits); |
1da177e4c Linux-2.6.12-rc2 |
1511 |
nm = compat_alloc_user_space(alloc_size); |
dfcd3c0dc [PATCH] Convert m... |
1512 |
err |= copy_to_user(nm, nodes_addr(bm), alloc_size); |
1da177e4c Linux-2.6.12-rc2 |
1513 1514 1515 1516 1517 1518 1519 1520 1521 |
} if (err) return -EFAULT; return sys_mbind(start, len, mode, nm, nr_bits+1, flags); } #endif |
480eccf9a Fix NUMA Memory P... |
1522 1523 1524 1525 1526 1527 1528 1529 |
/* * get_vma_policy(@task, @vma, @addr) * @task - task for fallback if vma policy == default * @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. * Falls back to @task or system default policy, as necessary. |
32f8516a8 mm, mempolicy: fi... |
1530 1531 |
* Current or other task's task mempolicy and non-shared vma policies must be * protected by task_lock(task) by the caller. |
52cd3b074 mempolicy: rework... |
1532 1533 1534 1535 |
* 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. |
480eccf9a Fix NUMA Memory P... |
1536 |
*/ |
d98f6cb67 mm: export get_vm... |
1537 |
struct mempolicy *get_vma_policy(struct task_struct *task, |
48fce3429 [PATCH] mempolici... |
1538 |
struct vm_area_struct *vma, unsigned long addr) |
1da177e4c Linux-2.6.12-rc2 |
1539 |
{ |
5606e3877 mm: numa: Migrate... |
1540 |
struct mempolicy *pol = get_task_policy(task); |
1da177e4c Linux-2.6.12-rc2 |
1541 1542 |
if (vma) { |
480eccf9a Fix NUMA Memory P... |
1543 |
if (vma->vm_ops && vma->vm_ops->get_policy) { |
ae4d8c16a mempolicy: fixup ... |
1544 1545 1546 1547 |
struct mempolicy *vpol = vma->vm_ops->get_policy(vma, addr); if (vpol) pol = vpol; |
00442ad04 mempolicy: fix a ... |
1548 |
} else if (vma->vm_policy) { |
1da177e4c Linux-2.6.12-rc2 |
1549 |
pol = vma->vm_policy; |
00442ad04 mempolicy: fix a ... |
1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 |
/* * 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 |
1560 1561 1562 1563 1564 |
} if (!pol) pol = &default_policy; return pol; } |
d3eb1570a mempolicy: fix is... |
1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 |
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... |
1584 1585 1586 1587 1588 |
/* * 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 ... |
1589 1590 |
{ /* Lower zones don't get a nodemask applied for MPOL_BIND */ |
45c4745af mempolicy: rename... |
1591 |
if (unlikely(policy->mode == MPOL_BIND) && |
d3eb1570a mempolicy: fix is... |
1592 |
apply_policy_zone(policy, gfp_zone(gfp)) && |
19770b326 mm: filter based ... |
1593 1594 1595 1596 1597 |
cpuset_nodemask_valid_mems_allowed(&policy->v.nodes)) return &policy->v.nodes; return NULL; } |
52cd3b074 mempolicy: rework... |
1598 |
/* Return a zonelist indicated by gfp for node representing a mempolicy */ |
2f5f9486f mm: change alloc_... |
1599 1600 |
static struct zonelist *policy_zonelist(gfp_t gfp, struct mempolicy *policy, int nd) |
1da177e4c Linux-2.6.12-rc2 |
1601 |
{ |
45c4745af mempolicy: rename... |
1602 |
switch (policy->mode) { |
1da177e4c Linux-2.6.12-rc2 |
1603 |
case MPOL_PREFERRED: |
fc36b8d3d mempolicy: use MP... |
1604 1605 |
if (!(policy->flags & MPOL_F_LOCAL)) nd = policy->v.preferred_node; |
1da177e4c Linux-2.6.12-rc2 |
1606 1607 |
break; case MPOL_BIND: |
19770b326 mm: filter based ... |
1608 |
/* |
52cd3b074 mempolicy: rework... |
1609 1610 |
* Normally, MPOL_BIND allocations are node-local within the * allowed nodemask. However, if __GFP_THISNODE is set and the |
6eb27e1fd mempolicy: remove... |
1611 |
* current node isn't part of the mask, we use the zonelist for |
52cd3b074 mempolicy: rework... |
1612 |
* the first node in the mask instead. |
19770b326 mm: filter based ... |
1613 |
*/ |
19770b326 mm: filter based ... |
1614 1615 1616 1617 |
if (unlikely(gfp & __GFP_THISNODE) && unlikely(!node_isset(nd, policy->v.nodes))) nd = first_node(policy->v.nodes); break; |
1da177e4c Linux-2.6.12-rc2 |
1618 |
default: |
1da177e4c Linux-2.6.12-rc2 |
1619 1620 |
BUG(); } |
0e88460da mm: introduce nod... |
1621 |
return node_zonelist(nd, gfp); |
1da177e4c Linux-2.6.12-rc2 |
1622 1623 1624 1625 1626 1627 1628 1629 1630 |
} /* Do dynamic interleaving for a process */ static unsigned interleave_nodes(struct mempolicy *policy) { unsigned nid, next; struct task_struct *me = current; nid = me->il_next; |
dfcd3c0dc [PATCH] Convert m... |
1631 |
next = next_node(nid, policy->v.nodes); |
1da177e4c Linux-2.6.12-rc2 |
1632 |
if (next >= MAX_NUMNODES) |
dfcd3c0dc [PATCH] Convert m... |
1633 |
next = first_node(policy->v.nodes); |
f5b087b52 mempolicy: add MP... |
1634 1635 |
if (next < MAX_NUMNODES) me->il_next = next; |
1da177e4c Linux-2.6.12-rc2 |
1636 1637 |
return nid; } |
dc85da15d [PATCH] NUMA poli... |
1638 1639 1640 |
/* * Depending on the memory policy provide a node from which to allocate the * next slab entry. |
52cd3b074 mempolicy: rework... |
1641 1642 1643 1644 |
* @policy must be protected by freeing by the caller. If @policy is * the current task's mempolicy, this protection is implicit, as only the * task can change it's policy. The system default policy requires no * such protection. |
dc85da15d [PATCH] NUMA poli... |
1645 |
*/ |
e7b691b08 slab/mempolicy: a... |
1646 |
unsigned slab_node(void) |
dc85da15d [PATCH] NUMA poli... |
1647 |
{ |
e7b691b08 slab/mempolicy: a... |
1648 1649 1650 1651 1652 1653 |
struct mempolicy *policy; if (in_interrupt()) return numa_node_id(); policy = current->mempolicy; |
fc36b8d3d mempolicy: use MP... |
1654 |
if (!policy || policy->flags & MPOL_F_LOCAL) |
bea904d54 mempolicy: use MP... |
1655 1656 1657 1658 |
return numa_node_id(); switch (policy->mode) { case MPOL_PREFERRED: |
fc36b8d3d mempolicy: use MP... |
1659 1660 1661 1662 |
/* * handled MPOL_F_LOCAL above */ return policy->v.preferred_node; |
765c4507a [PATCH] GFP_THISN... |
1663 |
|
dc85da15d [PATCH] NUMA poli... |
1664 1665 |
case MPOL_INTERLEAVE: return interleave_nodes(policy); |
dd1a239f6 mm: have zonelist... |
1666 |
case MPOL_BIND: { |
dc85da15d [PATCH] NUMA poli... |
1667 1668 1669 1670 |
/* * Follow bind policy behavior and start allocation at the * first node. */ |
19770b326 mm: filter based ... |
1671 1672 1673 1674 1675 1676 1677 |
struct zonelist *zonelist; struct zone *zone; enum zone_type highest_zoneidx = gfp_zone(GFP_KERNEL); zonelist = &NODE_DATA(numa_node_id())->node_zonelists[0]; (void)first_zones_zonelist(zonelist, highest_zoneidx, &policy->v.nodes, &zone); |
800416f79 numa: fix slab_no... |
1678 |
return zone ? zone->node : numa_node_id(); |
dd1a239f6 mm: have zonelist... |
1679 |
} |
dc85da15d [PATCH] NUMA poli... |
1680 |
|
dc85da15d [PATCH] NUMA poli... |
1681 |
default: |
bea904d54 mempolicy: use MP... |
1682 |
BUG(); |
dc85da15d [PATCH] NUMA poli... |
1683 1684 |
} } |
1da177e4c Linux-2.6.12-rc2 |
1685 1686 1687 1688 |
/* Do static interleaving for a VMA with known offset. */ static unsigned offset_il_node(struct mempolicy *pol, struct vm_area_struct *vma, unsigned long off) { |
dfcd3c0dc [PATCH] Convert m... |
1689 |
unsigned nnodes = nodes_weight(pol->v.nodes); |
f5b087b52 mempolicy: add MP... |
1690 |
unsigned target; |
1da177e4c Linux-2.6.12-rc2 |
1691 1692 |
int c; int nid = -1; |
f5b087b52 mempolicy: add MP... |
1693 1694 1695 |
if (!nnodes) return numa_node_id(); target = (unsigned int)off % nnodes; |
1da177e4c Linux-2.6.12-rc2 |
1696 1697 |
c = 0; do { |
dfcd3c0dc [PATCH] Convert m... |
1698 |
nid = next_node(nid, pol->v.nodes); |
1da177e4c Linux-2.6.12-rc2 |
1699 1700 |
c++; } while (c <= target); |
1da177e4c Linux-2.6.12-rc2 |
1701 1702 |
return nid; } |
5da7ca860 [PATCH] Add NUMA ... |
1703 1704 1705 1706 1707 1708 |
/* 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 ... |
1709 1710 1711 1712 1713 1714 1715 1716 1717 |
/* * 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 ... |
1718 1719 1720 1721 1722 |
off += (addr - vma->vm_start) >> shift; return offset_il_node(pol, vma, off); } else return interleave_nodes(pol); } |
778d3b0ff cpusets: randomiz... |
1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 |
/* * Return the bit number of a random bit set in the nodemask. * (returns -1 if nodemask is empty) */ int node_random(const nodemask_t *maskp) { int w, bit = -1; w = nodes_weight(*maskp); if (w) bit = bitmap_ord_to_pos(maskp->bits, get_random_int() % w, MAX_NUMNODES); return bit; } |
00ac59adf [PATCH] x86_64: F... |
1737 |
#ifdef CONFIG_HUGETLBFS |
480eccf9a Fix NUMA Memory P... |
1738 1739 1740 1741 1742 |
/* * huge_zonelist(@vma, @addr, @gfp_flags, @mpol) * @vma = virtual memory area whose policy is sought * @addr = address in @vma for shared policy lookup and interleave policy * @gfp_flags = for requested zone |
19770b326 mm: filter based ... |
1743 1744 |
* @mpol = pointer to mempolicy pointer for reference counted mempolicy * @nodemask = pointer to nodemask pointer for MPOL_BIND nodemask |
480eccf9a Fix NUMA Memory P... |
1745 |
* |
52cd3b074 mempolicy: rework... |
1746 1747 1748 1749 |
* Returns a zonelist suitable for a huge page allocation and a pointer * 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... |
1750 1751 |
* * Must be protected by get_mems_allowed() |
480eccf9a Fix NUMA Memory P... |
1752 |
*/ |
396faf030 Allow huge page a... |
1753 |
struct zonelist *huge_zonelist(struct vm_area_struct *vma, unsigned long addr, |
19770b326 mm: filter based ... |
1754 1755 |
gfp_t gfp_flags, struct mempolicy **mpol, nodemask_t **nodemask) |
5da7ca860 [PATCH] Add NUMA ... |
1756 |
{ |
480eccf9a Fix NUMA Memory P... |
1757 |
struct zonelist *zl; |
5da7ca860 [PATCH] Add NUMA ... |
1758 |
|
52cd3b074 mempolicy: rework... |
1759 |
*mpol = get_vma_policy(current, vma, addr); |
19770b326 mm: filter based ... |
1760 |
*nodemask = NULL; /* assume !MPOL_BIND */ |
5da7ca860 [PATCH] Add NUMA ... |
1761 |
|
52cd3b074 mempolicy: rework... |
1762 1763 |
if (unlikely((*mpol)->mode == MPOL_INTERLEAVE)) { zl = node_zonelist(interleave_nid(*mpol, vma, addr, |
a55164389 hugetlb: modular ... |
1764 |
huge_page_shift(hstate_vma(vma))), gfp_flags); |
52cd3b074 mempolicy: rework... |
1765 |
} else { |
2f5f9486f mm: change alloc_... |
1766 |
zl = policy_zonelist(gfp_flags, *mpol, numa_node_id()); |
52cd3b074 mempolicy: rework... |
1767 1768 |
if ((*mpol)->mode == MPOL_BIND) *nodemask = &(*mpol)->v.nodes; |
480eccf9a Fix NUMA Memory P... |
1769 1770 |
} return zl; |
5da7ca860 [PATCH] Add NUMA ... |
1771 |
} |
06808b082 hugetlb: derive h... |
1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 |
/* * 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... |
1796 |
task_lock(current); |
06808b082 hugetlb: derive h... |
1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 |
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... |
1816 |
task_unlock(current); |
06808b082 hugetlb: derive h... |
1817 1818 1819 |
return true; } |
00ac59adf [PATCH] x86_64: F... |
1820 |
#endif |
5da7ca860 [PATCH] Add NUMA ... |
1821 |
|
6f48d0ebd oom: select task ... |
1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 |
/* * 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 |
1865 1866 |
/* Allocate a page in interleaved policy. Own path because it needs to do special accounting. */ |
662f3a0b9 [PATCH] Remove ne... |
1867 1868 |
static struct page *alloc_page_interleave(gfp_t gfp, unsigned order, unsigned nid) |
1da177e4c Linux-2.6.12-rc2 |
1869 1870 1871 |
{ struct zonelist *zl; struct page *page; |
0e88460da mm: introduce nod... |
1872 |
zl = node_zonelist(nid, gfp); |
1da177e4c Linux-2.6.12-rc2 |
1873 |
page = __alloc_pages(gfp, order, zl); |
dd1a239f6 mm: have zonelist... |
1874 |
if (page && page_zone(page) == zonelist_zone(&zl->_zonerefs[0])) |
ca889e6c4 [PATCH] Use Zoned... |
1875 |
inc_zone_page_state(page, NUMA_INTERLEAVE_HIT); |
1da177e4c Linux-2.6.12-rc2 |
1876 1877 1878 1879 |
return page; } /** |
0bbbc0b33 thp: add numa awa... |
1880 |
* alloc_pages_vma - Allocate a page for a VMA. |
1da177e4c Linux-2.6.12-rc2 |
1881 1882 1883 1884 1885 1886 1887 1888 |
* * @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... |
1889 |
* @order:Order of the GFP allocation. |
1da177e4c Linux-2.6.12-rc2 |
1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 |
* @vma: Pointer to VMA or NULL if not available. * @addr: Virtual Address of the allocation. Must be inside the VMA. * * 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 * all allocations for pages that will be mapped into * user space. Returns NULL when no page can be allocated. * * Should be called with the mm_sem of the vma hold. */ struct page * |
0bbbc0b33 thp: add numa awa... |
1903 |
alloc_pages_vma(gfp_t gfp, int order, struct vm_area_struct *vma, |
2f5f9486f mm: change alloc_... |
1904 |
unsigned long addr, int node) |
1da177e4c Linux-2.6.12-rc2 |
1905 |
{ |
cc9a6c877 cpuset: mm: reduc... |
1906 |
struct mempolicy *pol; |
c0ff7453b cpuset,mm: fix no... |
1907 |
struct page *page; |
cc9a6c877 cpuset: mm: reduc... |
1908 1909 1910 1911 1912 |
unsigned int cpuset_mems_cookie; retry_cpuset: pol = get_vma_policy(current, vma, addr); cpuset_mems_cookie = get_mems_allowed(); |
1da177e4c Linux-2.6.12-rc2 |
1913 |
|
45c4745af mempolicy: rename... |
1914 |
if (unlikely(pol->mode == MPOL_INTERLEAVE)) { |
1da177e4c Linux-2.6.12-rc2 |
1915 |
unsigned nid; |
5da7ca860 [PATCH] Add NUMA ... |
1916 |
|
8eac563c1 thp: fix interlea... |
1917 |
nid = interleave_nid(pol, vma, addr, PAGE_SHIFT + order); |
52cd3b074 mempolicy: rework... |
1918 |
mpol_cond_put(pol); |
0bbbc0b33 thp: add numa awa... |
1919 |
page = alloc_page_interleave(gfp, order, nid); |
cc9a6c877 cpuset: mm: reduc... |
1920 1921 |
if (unlikely(!put_mems_allowed(cpuset_mems_cookie) && !page)) goto retry_cpuset; |
c0ff7453b cpuset,mm: fix no... |
1922 |
return page; |
1da177e4c Linux-2.6.12-rc2 |
1923 |
} |
212a0a6f2 mm, mempolicy: re... |
1924 1925 |
page = __alloc_pages_nodemask(gfp, order, policy_zonelist(gfp, pol, node), |
0bbbc0b33 thp: add numa awa... |
1926 |
policy_nodemask(gfp, pol)); |
212a0a6f2 mm, mempolicy: re... |
1927 1928 |
if (unlikely(mpol_needs_cond_ref(pol))) __mpol_put(pol); |
cc9a6c877 cpuset: mm: reduc... |
1929 1930 |
if (unlikely(!put_mems_allowed(cpuset_mems_cookie) && !page)) goto retry_cpuset; |
c0ff7453b cpuset,mm: fix no... |
1931 |
return page; |
1da177e4c Linux-2.6.12-rc2 |
1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 |
} /** * 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. * |
cf2a473c4 [PATCH] cpuset: c... |
1949 |
* Don't call cpuset_update_task_memory_state() unless |
1da177e4c Linux-2.6.12-rc2 |
1950 1951 1952 |
* 1) it's ok to take cpuset_sem (can WAIT), and * 2) allocating for current task (not interrupt). */ |
dd0fc66fb [PATCH] gfp flags... |
1953 |
struct page *alloc_pages_current(gfp_t gfp, unsigned order) |
1da177e4c Linux-2.6.12-rc2 |
1954 |
{ |
5606e3877 mm: numa: Migrate... |
1955 |
struct mempolicy *pol = get_task_policy(current); |
c0ff7453b cpuset,mm: fix no... |
1956 |
struct page *page; |
cc9a6c877 cpuset: mm: reduc... |
1957 |
unsigned int cpuset_mems_cookie; |
1da177e4c Linux-2.6.12-rc2 |
1958 |
|
9b819d204 [PATCH] Add __GFP... |
1959 |
if (!pol || in_interrupt() || (gfp & __GFP_THISNODE)) |
1da177e4c Linux-2.6.12-rc2 |
1960 |
pol = &default_policy; |
52cd3b074 mempolicy: rework... |
1961 |
|
cc9a6c877 cpuset: mm: reduc... |
1962 1963 |
retry_cpuset: cpuset_mems_cookie = get_mems_allowed(); |
52cd3b074 mempolicy: rework... |
1964 1965 1966 1967 |
/* * No reference counting needed for current->mempolicy * nor system default_policy */ |
45c4745af mempolicy: rename... |
1968 |
if (pol->mode == MPOL_INTERLEAVE) |
c0ff7453b cpuset,mm: fix no... |
1969 1970 1971 |
page = alloc_page_interleave(gfp, order, interleave_nodes(pol)); else page = __alloc_pages_nodemask(gfp, order, |
5c4b4be3b mm: use correct n... |
1972 1973 |
policy_zonelist(gfp, pol, numa_node_id()), policy_nodemask(gfp, pol)); |
cc9a6c877 cpuset: mm: reduc... |
1974 1975 1976 |
if (unlikely(!put_mems_allowed(cpuset_mems_cookie) && !page)) goto retry_cpuset; |
c0ff7453b cpuset,mm: fix no... |
1977 |
return page; |
1da177e4c Linux-2.6.12-rc2 |
1978 1979 |
} EXPORT_SYMBOL(alloc_pages_current); |
4225399a6 [PATCH] cpuset: r... |
1980 |
/* |
846a16bf0 mempolicy: rename... |
1981 |
* If mpol_dup() sees current->cpuset == cpuset_being_rebound, then it |
4225399a6 [PATCH] cpuset: r... |
1982 1983 1984 1985 |
* 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... |
1986 1987 1988 |
* * 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... |
1989 |
*/ |
4225399a6 [PATCH] cpuset: r... |
1990 |
|
846a16bf0 mempolicy: rename... |
1991 1992 |
/* Slow path of a mempolicy duplicate */ struct mempolicy *__mpol_dup(struct mempolicy *old) |
1da177e4c Linux-2.6.12-rc2 |
1993 1994 1995 1996 1997 |
{ struct mempolicy *new = kmem_cache_alloc(policy_cache, GFP_KERNEL); if (!new) return ERR_PTR(-ENOMEM); |
708c1bbc9 mempolicy: restru... |
1998 1999 2000 2001 2002 2003 2004 2005 |
/* task's mempolicy is protected by alloc_lock */ if (old == current->mempolicy) { task_lock(current); *new = *old; task_unlock(current); } else *new = *old; |
99ee4ca74 rcu: Suppress __m... |
2006 |
rcu_read_lock(); |
4225399a6 [PATCH] cpuset: r... |
2007 2008 |
if (current_cpuset_is_being_rebound()) { nodemask_t mems = cpuset_mems_allowed(current); |
708c1bbc9 mempolicy: restru... |
2009 2010 2011 2012 |
if (new->flags & MPOL_F_REBINDING) mpol_rebind_policy(new, &mems, MPOL_REBIND_STEP2); else mpol_rebind_policy(new, &mems, MPOL_REBIND_ONCE); |
4225399a6 [PATCH] cpuset: r... |
2013 |
} |
99ee4ca74 rcu: Suppress __m... |
2014 |
rcu_read_unlock(); |
1da177e4c Linux-2.6.12-rc2 |
2015 |
atomic_set(&new->refcnt, 1); |
1da177e4c Linux-2.6.12-rc2 |
2016 2017 2018 2019 |
return new; } /* Slow path of a mempolicy comparison */ |
fcfb4dcc9 mm/mempolicy.c: m... |
2020 |
bool __mpol_equal(struct mempolicy *a, struct mempolicy *b) |
1da177e4c Linux-2.6.12-rc2 |
2021 2022 |
{ if (!a || !b) |
fcfb4dcc9 mm/mempolicy.c: m... |
2023 |
return false; |
45c4745af mempolicy: rename... |
2024 |
if (a->mode != b->mode) |
fcfb4dcc9 mm/mempolicy.c: m... |
2025 |
return false; |
198005025 mempolicy: remove... |
2026 |
if (a->flags != b->flags) |
fcfb4dcc9 mm/mempolicy.c: m... |
2027 |
return false; |
198005025 mempolicy: remove... |
2028 2029 |
if (mpol_store_user_nodemask(a)) if (!nodes_equal(a->w.user_nodemask, b->w.user_nodemask)) |
fcfb4dcc9 mm/mempolicy.c: m... |
2030 |
return false; |
198005025 mempolicy: remove... |
2031 |
|
45c4745af mempolicy: rename... |
2032 |
switch (a->mode) { |
19770b326 mm: filter based ... |
2033 2034 |
case MPOL_BIND: /* Fall through */ |
1da177e4c Linux-2.6.12-rc2 |
2035 |
case MPOL_INTERLEAVE: |
fcfb4dcc9 mm/mempolicy.c: m... |
2036 |
return !!nodes_equal(a->v.nodes, b->v.nodes); |
1da177e4c Linux-2.6.12-rc2 |
2037 |
case MPOL_PREFERRED: |
757196618 mempolicy: remove... |
2038 |
return a->v.preferred_node == b->v.preferred_node; |
1da177e4c Linux-2.6.12-rc2 |
2039 2040 |
default: BUG(); |
fcfb4dcc9 mm/mempolicy.c: m... |
2041 |
return false; |
1da177e4c Linux-2.6.12-rc2 |
2042 2043 |
} } |
1da177e4c Linux-2.6.12-rc2 |
2044 |
/* |
1da177e4c Linux-2.6.12-rc2 |
2045 2046 2047 2048 2049 2050 2051 2052 2053 |
* 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. * They are protected by the sp->lock spinlock, which should be held * for any accesses to the tree. */ /* lookup first element intersecting start-end */ |
42288fe36 mm: mempolicy: Co... |
2054 |
/* Caller holds sp->lock */ |
1da177e4c Linux-2.6.12-rc2 |
2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 |
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); } /* Insert a new shared policy into the list. */ /* Caller holds sp->lock */ 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: ... |
2105 2106 |
pr_debug("inserting %lx-%lx: %d ", new->start, new->end, |
45c4745af mempolicy: rename... |
2107 |
new->policy ? new->policy->mode : 0); |
1da177e4c Linux-2.6.12-rc2 |
2108 2109 2110 2111 2112 2113 2114 2115 2116 2117 2118 |
} /* 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; |
42288fe36 mm: mempolicy: Co... |
2119 |
spin_lock(&sp->lock); |
1da177e4c Linux-2.6.12-rc2 |
2120 2121 2122 2123 2124 |
sn = sp_lookup(sp, idx, idx+1); if (sn) { mpol_get(sn->policy); pol = sn->policy; } |
42288fe36 mm: mempolicy: Co... |
2125 |
spin_unlock(&sp->lock); |
1da177e4c Linux-2.6.12-rc2 |
2126 2127 |
return pol; } |
63f74ca21 mempolicy: fix re... |
2128 2129 2130 2131 2132 |
static void sp_free(struct sp_node *n) { mpol_put(n->policy); kmem_cache_free(sn_cache, n); } |
771fb4d80 mm: mempolicy: Ch... |
2133 2134 2135 2136 2137 2138 2139 2140 2141 2142 2143 2144 2145 2146 2147 2148 2149 2150 2151 2152 2153 2154 2155 2156 2157 2158 2159 2160 2161 2162 2163 2164 2165 2166 2167 2168 2169 2170 2171 2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 2188 2189 2190 2191 2192 2193 2194 2195 2196 2197 2198 2199 2200 |
/** * mpol_misplaced - check whether current page node is valid in policy * * @page - page to be checked * @vma - vm area where page mapped * @addr - virtual address where page mapped * * 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; struct zone *zone; int curnid = page_to_nid(page); unsigned long pgoff; int polnid = -1; int ret = -1; BUG_ON(!vma); pol = get_vma_policy(current, vma, addr); if (!(pol->flags & MPOL_F_MOF)) goto out; switch (pol->mode) { case MPOL_INTERLEAVE: BUG_ON(addr >= vma->vm_end); BUG_ON(addr < vma->vm_start); pgoff = vma->vm_pgoff; pgoff += (addr - vma->vm_start) >> PAGE_SHIFT; polnid = offset_il_node(pol, vma, pgoff); break; case MPOL_PREFERRED: if (pol->flags & MPOL_F_LOCAL) polnid = numa_node_id(); else polnid = pol->v.preferred_node; break; case MPOL_BIND: /* * 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; (void)first_zones_zonelist( node_zonelist(numa_node_id(), GFP_HIGHUSER), gfp_zone(GFP_HIGHUSER), &pol->v.nodes, &zone); polnid = zone->node; break; default: BUG(); } |
5606e3877 mm: numa: Migrate... |
2201 2202 |
/* Migrate the page towards the node whose CPU is referencing it */ |
e42c8ff29 mm: numa: Use a t... |
2203 2204 |
if (pol->flags & MPOL_F_MORON) { int last_nid; |
5606e3877 mm: numa: Migrate... |
2205 |
polnid = numa_node_id(); |
e42c8ff29 mm: numa: Use a t... |
2206 2207 2208 2209 2210 2211 2212 2213 2214 2215 2216 2217 2218 2219 2220 2221 2222 2223 2224 2225 2226 |
/* * Multi-stage node selection is used in conjunction * with a periodic migration fault to build a temporal * task<->page relation. By using a two-stage filter we * remove short/unlikely relations. * * Using P(p) ~ n_p / n_t as per frequentist * probability, we can equate a task's usage of a * particular page (n_p) per total usage of this * page (n_t) (in a given time-span) to a probability. * * Our periodic faults will sample this probability and * getting the same result twice in a row, given these * samples are fully independent, is then given by * P(n)^2, provided our sample period is sufficiently * short compared to the usage pattern. * * This quadric squishes small probabilities, making * it less likely we act on an unlikely task<->page * relation. */ |
22b751c3d mm: rename page s... |
2227 |
last_nid = page_nid_xchg_last(page, polnid); |
e42c8ff29 mm: numa: Use a t... |
2228 2229 2230 |
if (last_nid != polnid) goto out; } |
771fb4d80 mm: mempolicy: Ch... |
2231 2232 2233 2234 2235 2236 2237 |
if (curnid != polnid) ret = polnid; out: mpol_cond_put(pol); return ret; } |
1da177e4c Linux-2.6.12-rc2 |
2238 2239 |
static void sp_delete(struct shared_policy *sp, struct sp_node *n) { |
140d5a490 numa: mempolicy: ... |
2240 2241 |
pr_debug("deleting %lx-l%lx ", n->start, n->end); |
1da177e4c Linux-2.6.12-rc2 |
2242 |
rb_erase(&n->nd, &sp->root); |
63f74ca21 mempolicy: fix re... |
2243 |
sp_free(n); |
1da177e4c Linux-2.6.12-rc2 |
2244 |
} |
42288fe36 mm: mempolicy: Co... |
2245 2246 2247 2248 2249 2250 2251 |
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... |
2252 2253 |
static struct sp_node *sp_alloc(unsigned long start, unsigned long end, struct mempolicy *pol) |
1da177e4c Linux-2.6.12-rc2 |
2254 |
{ |
869833f2c mempolicy: remove... |
2255 2256 |
struct sp_node *n; struct mempolicy *newpol; |
1da177e4c Linux-2.6.12-rc2 |
2257 |
|
869833f2c mempolicy: remove... |
2258 |
n = kmem_cache_alloc(sn_cache, GFP_KERNEL); |
1da177e4c Linux-2.6.12-rc2 |
2259 2260 |
if (!n) return NULL; |
869833f2c mempolicy: remove... |
2261 2262 2263 2264 2265 2266 2267 |
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... |
2268 |
sp_node_init(n, start, end, newpol); |
869833f2c mempolicy: remove... |
2269 |
|
1da177e4c Linux-2.6.12-rc2 |
2270 2271 2272 2273 2274 2275 2276 |
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 ... |
2277 |
struct sp_node *n; |
42288fe36 mm: mempolicy: Co... |
2278 2279 |
struct sp_node *n_new = NULL; struct mempolicy *mpol_new = NULL; |
b22d127a3 mempolicy: fix a ... |
2280 |
int ret = 0; |
1da177e4c Linux-2.6.12-rc2 |
2281 |
|
42288fe36 mm: mempolicy: Co... |
2282 2283 |
restart: spin_lock(&sp->lock); |
1da177e4c Linux-2.6.12-rc2 |
2284 2285 2286 2287 2288 2289 2290 2291 2292 2293 2294 2295 |
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... |
2296 2297 2298 2299 2300 |
if (!n_new) goto alloc_new; *mpol_new = *n->policy; atomic_set(&mpol_new->refcnt, 1); |
7880639c3 mm/mempolicy.c: f... |
2301 |
sp_node_init(n_new, end, n->end, mpol_new); |
1da177e4c Linux-2.6.12-rc2 |
2302 |
n->end = start; |
5ca395751 mm/mempolicy.c: f... |
2303 |
sp_insert(sp, n_new); |
42288fe36 mm: mempolicy: Co... |
2304 2305 |
n_new = NULL; mpol_new = NULL; |
1da177e4c Linux-2.6.12-rc2 |
2306 2307 2308 2309 2310 2311 2312 2313 2314 2315 |
break; } else n->end = start; } if (!next) break; n = rb_entry(next, struct sp_node, nd); } if (new) sp_insert(sp, new); |
42288fe36 mm: mempolicy: Co... |
2316 2317 2318 2319 2320 2321 2322 2323 |
spin_unlock(&sp->lock); 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 ... |
2324 |
return ret; |
42288fe36 mm: mempolicy: Co... |
2325 2326 2327 2328 2329 2330 2331 2332 2333 2334 2335 |
alloc_new: spin_unlock(&sp->lock); 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 |
2336 |
} |
71fe804b6 mempolicy: use st... |
2337 2338 2339 2340 2341 2342 2343 2344 |
/** * 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... |
2345 |
* This is called at get_inode() calls and we can use GFP_KERNEL. |
71fe804b6 mempolicy: use st... |
2346 2347 2348 |
*/ void mpol_shared_policy_init(struct shared_policy *sp, struct mempolicy *mpol) { |
58568d2a8 cpuset,mm: update... |
2349 |
int ret; |
71fe804b6 mempolicy: use st... |
2350 |
sp->root = RB_ROOT; /* empty tree == default mempolicy */ |
42288fe36 mm: mempolicy: Co... |
2351 |
spin_lock_init(&sp->lock); |
71fe804b6 mempolicy: use st... |
2352 2353 2354 2355 |
if (mpol) { struct vm_area_struct pvma; struct mempolicy *new; |
4bfc44958 mm: make set_memp... |
2356 |
NODEMASK_SCRATCH(scratch); |
71fe804b6 mempolicy: use st... |
2357 |
|
4bfc44958 mm: make set_memp... |
2358 |
if (!scratch) |
5c0c16549 mempolicy: fix da... |
2359 |
goto put_mpol; |
71fe804b6 mempolicy: use st... |
2360 2361 |
/* contextualize the tmpfs mount point mempolicy */ new = mpol_new(mpol->mode, mpol->flags, &mpol->w.user_nodemask); |
15d77835a mempolicy: factor... |
2362 |
if (IS_ERR(new)) |
0cae3457b mempolicy: ERR_PT... |
2363 |
goto free_scratch; /* no valid nodemask intersection */ |
58568d2a8 cpuset,mm: update... |
2364 2365 |
task_lock(current); |
4bfc44958 mm: make set_memp... |
2366 |
ret = mpol_set_nodemask(new, &mpol->w.user_nodemask, scratch); |
58568d2a8 cpuset,mm: update... |
2367 |
task_unlock(current); |
15d77835a mempolicy: factor... |
2368 |
if (ret) |
5c0c16549 mempolicy: fix da... |
2369 |
goto put_new; |
71fe804b6 mempolicy: use st... |
2370 2371 2372 2373 2374 |
/* Create pseudo-vma that contains just the policy */ memset(&pvma, 0, sizeof(struct vm_area_struct)); pvma.vm_end = TASK_SIZE; /* policy covers entire file */ mpol_set_shared_policy(sp, &pvma, new); /* adds ref */ |
15d77835a mempolicy: factor... |
2375 |
|
5c0c16549 mempolicy: fix da... |
2376 |
put_new: |
71fe804b6 mempolicy: use st... |
2377 |
mpol_put(new); /* drop initial ref */ |
0cae3457b mempolicy: ERR_PT... |
2378 |
free_scratch: |
4bfc44958 mm: make set_memp... |
2379 |
NODEMASK_SCRATCH_FREE(scratch); |
5c0c16549 mempolicy: fix da... |
2380 2381 |
put_mpol: mpol_put(mpol); /* drop our incoming ref on sb mpol */ |
7339ff830 [PATCH] Add tmpfs... |
2382 2383 |
} } |
1da177e4c Linux-2.6.12-rc2 |
2384 2385 2386 2387 2388 2389 |
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... |
2390 2391 |
pr_debug("set_shared_policy %lx sz %lu %d %d %lx ", |
1da177e4c Linux-2.6.12-rc2 |
2392 |
vma->vm_pgoff, |
45c4745af mempolicy: rename... |
2393 |
sz, npol ? npol->mode : -1, |
028fec414 mempolicy: suppor... |
2394 |
npol ? npol->flags : -1, |
00ef2d2f8 mm: use NUMA_NO_NODE |
2395 |
npol ? nodes_addr(npol->v.nodes)[0] : NUMA_NO_NODE); |
1da177e4c Linux-2.6.12-rc2 |
2396 2397 2398 2399 2400 2401 2402 2403 |
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... |
2404 |
sp_free(new); |
1da177e4c Linux-2.6.12-rc2 |
2405 2406 2407 2408 2409 2410 2411 2412 2413 2414 2415 |
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; |
42288fe36 mm: mempolicy: Co... |
2416 |
spin_lock(&p->lock); |
1da177e4c Linux-2.6.12-rc2 |
2417 2418 2419 2420 |
next = rb_first(&p->root); while (next) { n = rb_entry(next, struct sp_node, nd); next = rb_next(&n->nd); |
63f74ca21 mempolicy: fix re... |
2421 |
sp_delete(p, n); |
1da177e4c Linux-2.6.12-rc2 |
2422 |
} |
42288fe36 mm: mempolicy: Co... |
2423 |
spin_unlock(&p->lock); |
1da177e4c Linux-2.6.12-rc2 |
2424 |
} |
1a687c2e9 mm: sched: numa: ... |
2425 2426 2427 2428 2429 2430 2431 2432 2433 2434 2435 2436 2437 2438 2439 2440 2441 2442 2443 2444 2445 2446 2447 2448 2449 2450 2451 2452 2453 2454 2455 2456 2457 2458 2459 2460 2461 2462 2463 2464 2465 2466 2467 2468 |
#ifdef CONFIG_NUMA_BALANCING static bool __initdata numabalancing_override; static void __init check_numabalancing_enable(void) { bool numabalancing_default = false; if (IS_ENABLED(CONFIG_NUMA_BALANCING_DEFAULT_ENABLED)) numabalancing_default = true; if (nr_node_ids > 1 && !numabalancing_override) { printk(KERN_INFO "Enabling automatic NUMA balancing. " "Configure with numa_balancing= or sysctl"); set_numabalancing_state(numabalancing_default); } } static int __init setup_numabalancing(char *str) { int ret = 0; if (!str) goto out; numabalancing_override = true; if (!strcmp(str, "enable")) { set_numabalancing_state(true); ret = 1; } else if (!strcmp(str, "disable")) { set_numabalancing_state(false); ret = 1; } out: if (!ret) printk(KERN_WARNING "Unable to parse numa_balancing= "); 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 |
2469 2470 2471 |
/* assumes fs == KERNEL_DS */ void __init numa_policy_init(void) { |
b71636e29 numa: mempolicy: ... |
2472 2473 2474 |
nodemask_t interleave_nodes; unsigned long largest = 0; int nid, prefer = 0; |
1da177e4c Linux-2.6.12-rc2 |
2475 2476 |
policy_cache = kmem_cache_create("numa_policy", sizeof(struct mempolicy), |
20c2df83d mm: Remove slab d... |
2477 |
0, SLAB_PANIC, NULL); |
1da177e4c Linux-2.6.12-rc2 |
2478 2479 2480 |
sn_cache = kmem_cache_create("shared_policy_node", sizeof(struct sp_node), |
20c2df83d mm: Remove slab d... |
2481 |
0, SLAB_PANIC, NULL); |
1da177e4c Linux-2.6.12-rc2 |
2482 |
|
5606e3877 mm: numa: Migrate... |
2483 2484 2485 2486 2487 2488 2489 2490 |
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: ... |
2491 2492 2493 2494 2495 2496 |
/* * 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_... |
2497 |
for_each_node_state(nid, N_MEMORY) { |
b71636e29 numa: mempolicy: ... |
2498 2499 2500 2501 2502 2503 2504 2505 2506 2507 2508 2509 2510 2511 2512 2513 |
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 |
2514 |
|
028fec414 mempolicy: suppor... |
2515 |
if (do_set_mempolicy(MPOL_INTERLEAVE, 0, &interleave_nodes)) |
1da177e4c Linux-2.6.12-rc2 |
2516 2517 |
printk("numa_policy_init: interleaving failed "); |
1a687c2e9 mm: sched: numa: ... |
2518 2519 |
check_numabalancing_enable(); |
1da177e4c Linux-2.6.12-rc2 |
2520 |
} |
8bccd85ff [PATCH] Implement... |
2521 |
/* Reset policy of current process to default */ |
1da177e4c Linux-2.6.12-rc2 |
2522 2523 |
void numa_default_policy(void) { |
028fec414 mempolicy: suppor... |
2524 |
do_set_mempolicy(MPOL_DEFAULT, 0, NULL); |
1da177e4c Linux-2.6.12-rc2 |
2525 |
} |
68860ec10 [PATCH] cpusets: ... |
2526 |
|
4225399a6 [PATCH] cpuset: r... |
2527 |
/* |
095f1fc4e mempolicy: rework... |
2528 2529 2530 2531 |
* Parse and format mempolicy from/to strings */ /* |
f2a07f40d tmpfs mempolicy: ... |
2532 |
* "local" is implemented internally by MPOL_PREFERRED with MPOL_F_LOCAL flag. |
1a75a6c82 [PATCH] Fold numa... |
2533 |
*/ |
345ace9c7 mempolicy: rename... |
2534 2535 2536 2537 2538 2539 |
static const char * const policy_modes[] = { [MPOL_DEFAULT] = "default", [MPOL_PREFERRED] = "prefer", [MPOL_BIND] = "bind", [MPOL_INTERLEAVE] = "interleave", |
d3a710337 mm: mempolicy: Ad... |
2540 |
[MPOL_LOCAL] = "local", |
345ace9c7 mempolicy: rename... |
2541 |
}; |
1a75a6c82 [PATCH] Fold numa... |
2542 |
|
095f1fc4e mempolicy: rework... |
2543 2544 2545 |
#ifdef CONFIG_TMPFS /** |
f2a07f40d tmpfs mempolicy: ... |
2546 |
* mpol_parse_str - parse string to mempolicy, for tmpfs mpol mount option. |
095f1fc4e mempolicy: rework... |
2547 |
* @str: string containing mempolicy to parse |
71fe804b6 mempolicy: use st... |
2548 |
* @mpol: pointer to struct mempolicy pointer, returned on success. |
095f1fc4e mempolicy: rework... |
2549 2550 2551 2552 |
* * Format of input: * <mode>[=<flags>][:<nodelist>] * |
71fe804b6 mempolicy: use st... |
2553 |
* On success, returns 0, else 1 |
095f1fc4e mempolicy: rework... |
2554 |
*/ |
a7a88b237 mempolicy: remove... |
2555 |
int mpol_parse_str(char *str, struct mempolicy **mpol) |
095f1fc4e mempolicy: rework... |
2556 |
{ |
71fe804b6 mempolicy: use st... |
2557 |
struct mempolicy *new = NULL; |
b4652e842 mempolicy: lose u... |
2558 |
unsigned short mode; |
f2a07f40d tmpfs mempolicy: ... |
2559 |
unsigned short mode_flags; |
71fe804b6 mempolicy: use st... |
2560 |
nodemask_t nodes; |
095f1fc4e mempolicy: rework... |
2561 2562 |
char *nodelist = strchr(str, ':'); char *flags = strchr(str, '='); |
095f1fc4e mempolicy: rework... |
2563 2564 2565 2566 2567 |
int err = 1; if (nodelist) { /* NUL-terminate mode or flags string */ *nodelist++ = '\0'; |
71fe804b6 mempolicy: use st... |
2568 |
if (nodelist_parse(nodelist, nodes)) |
095f1fc4e mempolicy: rework... |
2569 |
goto out; |
01f13bd60 mempolicy: use N_... |
2570 |
if (!nodes_subset(nodes, node_states[N_MEMORY])) |
095f1fc4e mempolicy: rework... |
2571 |
goto out; |
71fe804b6 mempolicy: use st... |
2572 2573 |
} else nodes_clear(nodes); |
095f1fc4e mempolicy: rework... |
2574 2575 |
if (flags) *flags++ = '\0'; /* terminate mode string */ |
479e2802d mm: mempolicy: Ma... |
2576 |
for (mode = 0; mode < MPOL_MAX; mode++) { |
345ace9c7 mempolicy: rename... |
2577 |
if (!strcmp(str, policy_modes[mode])) { |
095f1fc4e mempolicy: rework... |
2578 2579 2580 |
break; } } |
a720094de mm: mempolicy: Hi... |
2581 |
if (mode >= MPOL_MAX) |
095f1fc4e mempolicy: rework... |
2582 |
goto out; |
71fe804b6 mempolicy: use st... |
2583 |
switch (mode) { |
095f1fc4e mempolicy: rework... |
2584 |
case MPOL_PREFERRED: |
71fe804b6 mempolicy: use st... |
2585 2586 2587 |
/* * Insist on a nodelist of one node only */ |
095f1fc4e mempolicy: rework... |
2588 2589 2590 2591 |
if (nodelist) { char *rest = nodelist; while (isdigit(*rest)) rest++; |
926f2ae04 tmpfs: cleanup mp... |
2592 2593 |
if (*rest) goto out; |
095f1fc4e mempolicy: rework... |
2594 2595 |
} break; |
095f1fc4e mempolicy: rework... |
2596 2597 2598 2599 2600 |
case MPOL_INTERLEAVE: /* * Default to online nodes with memory if no nodelist */ if (!nodelist) |
01f13bd60 mempolicy: use N_... |
2601 |
nodes = node_states[N_MEMORY]; |
3f226aa1c mempolicy: suppor... |
2602 |
break; |
71fe804b6 mempolicy: use st... |
2603 |
case MPOL_LOCAL: |
3f226aa1c mempolicy: suppor... |
2604 |
/* |
71fe804b6 mempolicy: use st... |
2605 |
* Don't allow a nodelist; mpol_new() checks flags |
3f226aa1c mempolicy: suppor... |
2606 |
*/ |
71fe804b6 mempolicy: use st... |
2607 |
if (nodelist) |
3f226aa1c mempolicy: suppor... |
2608 |
goto out; |
71fe804b6 mempolicy: use st... |
2609 |
mode = MPOL_PREFERRED; |
3f226aa1c mempolicy: suppor... |
2610 |
break; |
413b43dea tmpfs: fix oops o... |
2611 2612 2613 2614 2615 2616 2617 |
case MPOL_DEFAULT: /* * Insist on a empty nodelist */ if (!nodelist) err = 0; goto out; |
d69b2e63e tmpfs: mpol=bind:... |
2618 2619 2620 2621 2622 2623 |
case MPOL_BIND: /* * Insist on a nodelist */ if (!nodelist) goto out; |
095f1fc4e mempolicy: rework... |
2624 |
} |
71fe804b6 mempolicy: use st... |
2625 |
mode_flags = 0; |
095f1fc4e mempolicy: rework... |
2626 2627 2628 2629 2630 2631 |
if (flags) { /* * Currently, we only support two mutually exclusive * mode flags. */ if (!strcmp(flags, "static")) |
71fe804b6 mempolicy: use st... |
2632 |
mode_flags |= MPOL_F_STATIC_NODES; |
095f1fc4e mempolicy: rework... |
2633 |
else if (!strcmp(flags, "relative")) |
71fe804b6 mempolicy: use st... |
2634 |
mode_flags |= MPOL_F_RELATIVE_NODES; |
095f1fc4e mempolicy: rework... |
2635 |
else |
926f2ae04 tmpfs: cleanup mp... |
2636 |
goto out; |
095f1fc4e mempolicy: rework... |
2637 |
} |
71fe804b6 mempolicy: use st... |
2638 2639 2640 |
new = mpol_new(mode, mode_flags, &nodes); if (IS_ERR(new)) |
926f2ae04 tmpfs: cleanup mp... |
2641 |
goto out; |
f2a07f40d tmpfs mempolicy: ... |
2642 2643 2644 2645 2646 2647 2648 2649 2650 2651 2652 2653 2654 2655 2656 2657 |
/* * 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... |
2658 |
err = 0; |
71fe804b6 mempolicy: use st... |
2659 |
|
095f1fc4e mempolicy: rework... |
2660 2661 2662 2663 2664 2665 |
out: /* Restore string for error message */ if (nodelist) *--nodelist = ':'; if (flags) *--flags = '='; |
71fe804b6 mempolicy: use st... |
2666 2667 |
if (!err) *mpol = new; |
095f1fc4e mempolicy: rework... |
2668 2669 2670 |
return err; } #endif /* CONFIG_TMPFS */ |
71fe804b6 mempolicy: use st... |
2671 2672 2673 2674 2675 |
/** * 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... |
2676 |
* |
1a75a6c82 [PATCH] Fold numa... |
2677 2678 2679 2680 |
* Convert a mempolicy into a string. * Returns the number of characters in buffer (if positive) * or an error (negative) */ |
a7a88b237 mempolicy: remove... |
2681 |
int mpol_to_str(char *buffer, int maxlen, struct mempolicy *pol) |
1a75a6c82 [PATCH] Fold numa... |
2682 2683 2684 2685 |
{ char *p = buffer; int l; nodemask_t nodes; |
bea904d54 mempolicy: use MP... |
2686 |
unsigned short mode; |
f5b087b52 mempolicy: add MP... |
2687 |
unsigned short flags = pol ? pol->flags : 0; |
1a75a6c82 [PATCH] Fold numa... |
2688 |
|
2291990ab mempolicy: clean-... |
2689 2690 2691 2692 |
/* * Sanity check: room for longest mode, flag and some nodes */ VM_BUG_ON(maxlen < strlen("interleave") + strlen("relative") + 16); |
bea904d54 mempolicy: use MP... |
2693 2694 2695 2696 |
if (!pol || pol == &default_policy) mode = MPOL_DEFAULT; else mode = pol->mode; |
1a75a6c82 [PATCH] Fold numa... |
2697 2698 2699 2700 2701 2702 2703 |
switch (mode) { case MPOL_DEFAULT: nodes_clear(nodes); break; case MPOL_PREFERRED: nodes_clear(nodes); |
fc36b8d3d mempolicy: use MP... |
2704 |
if (flags & MPOL_F_LOCAL) |
f2a07f40d tmpfs mempolicy: ... |
2705 |
mode = MPOL_LOCAL; |
53f2556b6 mempolicy: mPOL_P... |
2706 |
else |
fc36b8d3d mempolicy: use MP... |
2707 |
node_set(pol->v.preferred_node, nodes); |
1a75a6c82 [PATCH] Fold numa... |
2708 2709 2710 |
break; case MPOL_BIND: |
19770b326 mm: filter based ... |
2711 |
/* Fall through */ |
1a75a6c82 [PATCH] Fold numa... |
2712 |
case MPOL_INTERLEAVE: |
f2a07f40d tmpfs mempolicy: ... |
2713 |
nodes = pol->v.nodes; |
1a75a6c82 [PATCH] Fold numa... |
2714 2715 2716 |
break; default: |
80de7c313 Remove user-trigg... |
2717 |
return -EINVAL; |
1a75a6c82 [PATCH] Fold numa... |
2718 |
} |
345ace9c7 mempolicy: rename... |
2719 |
l = strlen(policy_modes[mode]); |
53f2556b6 mempolicy: mPOL_P... |
2720 2721 |
if (buffer + maxlen < p + l + 1) return -ENOSPC; |
1a75a6c82 [PATCH] Fold numa... |
2722 |
|
345ace9c7 mempolicy: rename... |
2723 |
strcpy(p, policy_modes[mode]); |
1a75a6c82 [PATCH] Fold numa... |
2724 |
p += l; |
fc36b8d3d mempolicy: use MP... |
2725 |
if (flags & MPOL_MODE_FLAGS) { |
f5b087b52 mempolicy: add MP... |
2726 2727 2728 |
if (buffer + maxlen < p + 2) return -ENOSPC; *p++ = '='; |
2291990ab mempolicy: clean-... |
2729 2730 2731 |
/* * Currently, the only defined flags are mutually exclusive */ |
f5b087b52 mempolicy: add MP... |
2732 |
if (flags & MPOL_F_STATIC_NODES) |
2291990ab mempolicy: clean-... |
2733 2734 2735 |
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... |
2736 |
} |
1a75a6c82 [PATCH] Fold numa... |
2737 2738 2739 |
if (!nodes_empty(nodes)) { if (buffer + maxlen < p + 2) return -ENOSPC; |
095f1fc4e mempolicy: rework... |
2740 |
*p++ = ':'; |
1a75a6c82 [PATCH] Fold numa... |
2741 2742 2743 2744 |
p += nodelist_scnprintf(p, buffer + maxlen - p, nodes); } return p - buffer; } |