diff options
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/mempolicy.c | 5 | ||||
| -rw-r--r-- | mm/migrate.c | 11 | ||||
| -rw-r--r-- | mm/page_alloc.c | 2 | ||||
| -rw-r--r-- | mm/slub.c | 46 |
4 files changed, 45 insertions, 19 deletions
diff --git a/mm/mempolicy.c b/mm/mempolicy.c index 172abffeb2e..bb54b88c3d5 100644 --- a/mm/mempolicy.c +++ b/mm/mempolicy.c @@ -955,6 +955,11 @@ asmlinkage long sys_migrate_pages(pid_t pid, unsigned long maxnode, goto out; } + if (!nodes_subset(new, node_online_map)) { + err = -EINVAL; + goto out; + } + err = security_task_movememory(task); if (err) goto out; diff --git a/mm/migrate.c b/mm/migrate.c index 37c73b90200..e2fdbce1874 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -611,6 +611,7 @@ static int unmap_and_move(new_page_t get_new_page, unsigned long private, int rc = 0; int *result = NULL; struct page *newpage = get_new_page(page, private, &result); + int rcu_locked = 0; if (!newpage) return -ENOMEM; @@ -636,8 +637,13 @@ static int unmap_and_move(new_page_t get_new_page, unsigned long private, * we cannot notice that anon_vma is freed while we migrates a page. * This rcu_read_lock() delays freeing anon_vma pointer until the end * of migration. File cache pages are no problem because of page_lock() + * File Caches may use write_page() or lock_page() in migration, then, + * just care Anon page here. */ - rcu_read_lock(); + if (PageAnon(page)) { + rcu_read_lock(); + rcu_locked = 1; + } /* * This is a corner case handling. * When a new swap-cache is read into, it is linked to LRU @@ -656,7 +662,8 @@ static int unmap_and_move(new_page_t get_new_page, unsigned long private, if (rc) remove_migration_ptes(page, page); rcu_unlock: - rcu_read_unlock(); + if (rcu_locked) + rcu_read_unlock(); unlock: diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 6427653023a..1a8c59571cb 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -2345,6 +2345,8 @@ static int __cpuinit process_zones(int cpu) return 0; bad: for_each_zone(dzone) { + if (!populated_zone(dzone)) + continue; if (dzone == zone) break; kfree(zone_pcp(dzone, cpu)); diff --git a/mm/slub.c b/mm/slub.c index 04151da399c..addb20a6d67 100644 --- a/mm/slub.c +++ b/mm/slub.c @@ -986,7 +986,9 @@ out: __setup("slub_debug", setup_slub_debug); -static void kmem_cache_open_debug_check(struct kmem_cache *s) +static unsigned long kmem_cache_flags(unsigned long objsize, + unsigned long flags, const char *name, + void (*ctor)(void *, struct kmem_cache *, unsigned long)) { /* * The page->offset field is only 16 bit wide. This is an offset @@ -1000,19 +1002,21 @@ static void kmem_cache_open_debug_check(struct kmem_cache *s) * Debugging or ctor may create a need to move the free * pointer. Fail if this happens. */ - if (s->objsize >= 65535 * sizeof(void *)) { - BUG_ON(s->flags & (SLAB_RED_ZONE | SLAB_POISON | + if (objsize >= 65535 * sizeof(void *)) { + BUG_ON(flags & (SLAB_RED_ZONE | SLAB_POISON | SLAB_STORE_USER | SLAB_DESTROY_BY_RCU)); - BUG_ON(s->ctor); - } - else + BUG_ON(ctor); + } else { /* * Enable debugging if selected on the kernel commandline. */ if (slub_debug && (!slub_debug_slabs || - strncmp(slub_debug_slabs, s->name, + strncmp(slub_debug_slabs, name, strlen(slub_debug_slabs)) == 0)) - s->flags |= slub_debug; + flags |= slub_debug; + } + + return flags; } #else static inline void setup_object_debug(struct kmem_cache *s, @@ -1029,7 +1033,12 @@ static inline int slab_pad_check(struct kmem_cache *s, struct page *page) static inline int check_object(struct kmem_cache *s, struct page *page, void *object, int active) { return 1; } static inline void add_full(struct kmem_cache_node *n, struct page *page) {} -static inline void kmem_cache_open_debug_check(struct kmem_cache *s) {} +static inline unsigned long kmem_cache_flags(unsigned long objsize, + unsigned long flags, const char *name, + void (*ctor)(void *, struct kmem_cache *, unsigned long)) +{ + return flags; +} #define slub_debug 0 #endif /* @@ -2088,9 +2097,8 @@ static int kmem_cache_open(struct kmem_cache *s, gfp_t gfpflags, s->name = name; s->ctor = ctor; s->objsize = size; - s->flags = flags; s->align = align; - kmem_cache_open_debug_check(s); + s->flags = kmem_cache_flags(size, flags, name, ctor); if (!calculate_sizes(s)) goto error; @@ -2660,7 +2668,7 @@ static int slab_unmergeable(struct kmem_cache *s) } static struct kmem_cache *find_mergeable(size_t size, - size_t align, unsigned long flags, + size_t align, unsigned long flags, const char *name, void (*ctor)(void *, struct kmem_cache *, unsigned long)) { struct kmem_cache *s; @@ -2674,6 +2682,7 @@ static struct kmem_cache *find_mergeable(size_t size, size = ALIGN(size, sizeof(void *)); align = calculate_alignment(flags, align, size); size = ALIGN(size, align); + flags = kmem_cache_flags(size, flags, name, NULL); list_for_each_entry(s, &slab_caches, list) { if (slab_unmergeable(s)) @@ -2682,8 +2691,7 @@ static struct kmem_cache *find_mergeable(size_t size, if (size > s->size) continue; - if (((flags | slub_debug) & SLUB_MERGE_SAME) != - (s->flags & SLUB_MERGE_SAME)) + if ((flags & SLUB_MERGE_SAME) != (s->flags & SLUB_MERGE_SAME)) continue; /* * Check if alignment is compatible. @@ -2707,7 +2715,7 @@ struct kmem_cache *kmem_cache_create(const char *name, size_t size, struct kmem_cache *s; down_write(&slub_lock); - s = find_mergeable(size, align, flags, ctor); + s = find_mergeable(size, align, flags, name, ctor); if (s) { s->refcount++; /* @@ -3813,7 +3821,9 @@ static int __init slab_sysfs_init(void) list_for_each_entry(s, &slab_caches, list) { err = sysfs_slab_add(s); - BUG_ON(err); + if (err) + printk(KERN_ERR "SLUB: Unable to add boot slab %s" + " to sysfs\n", s->name); } while (alias_list) { @@ -3821,7 +3831,9 @@ static int __init slab_sysfs_init(void) alias_list = alias_list->next; err = sysfs_slab_alias(al->s, al->name); - BUG_ON(err); + if (err) + printk(KERN_ERR "SLUB: Unable to add boot slab alias" + " %s to sysfs\n", s->name); kfree(al); } |