diff options
| -rw-r--r-- | mm/slub.c | 30 |
1 files changed, 18 insertions, 12 deletions
diff --git a/mm/slub.c b/mm/slub.c index c83fe96f5e42..e131084e87a3 100644 --- a/mm/slub.c +++ b/mm/slub.c @@ -1069,13 +1069,13 @@ bad: return 0; } -static noinline int free_debug_processing(struct kmem_cache *s, - struct page *page, void *object, unsigned long addr) +static noinline struct kmem_cache_node *free_debug_processing( + struct kmem_cache *s, struct page *page, void *object, + unsigned long addr, unsigned long *flags) { - unsigned long flags; - int rc = 0; + struct kmem_cache_node *n = get_node(s, page_to_nid(page)); - local_irq_save(flags); + spin_lock_irqsave(&n->list_lock, *flags); slab_lock(page); if (!check_slab(s, page)) @@ -1113,15 +1113,19 @@ static noinline int free_debug_processing(struct kmem_cache *s, set_track(s, object, TRACK_FREE, addr); trace(s, page, object, 0); init_object(s, object, SLUB_RED_INACTIVE); - rc = 1; out: slab_unlock(page); - local_irq_restore(flags); - return rc; + /* + * Keep node_lock to preserve integrity + * until the object is actually freed + */ + return n; fail: + slab_unlock(page); + spin_unlock_irqrestore(&n->list_lock, *flags); slab_fix(s, "Object at 0x%p not freed", object); - goto out; + return NULL; } static int __init setup_slub_debug(char *str) @@ -1214,8 +1218,9 @@ static inline void setup_object_debug(struct kmem_cache *s, static inline int alloc_debug_processing(struct kmem_cache *s, struct page *page, void *object, unsigned long addr) { return 0; } -static inline int free_debug_processing(struct kmem_cache *s, - struct page *page, void *object, unsigned long addr) { return 0; } +static inline struct kmem_cache_node *free_debug_processing( + struct kmem_cache *s, struct page *page, void *object, + unsigned long addr, unsigned long *flags) { return NULL; } static inline int slab_pad_check(struct kmem_cache *s, struct page *page) { return 1; } @@ -2452,7 +2457,8 @@ static void __slab_free(struct kmem_cache *s, struct page *page, stat(s, FREE_SLOWPATH); - if (kmem_cache_debug(s) && !free_debug_processing(s, page, x, addr)) + if (kmem_cache_debug(s) && + !(n = free_debug_processing(s, page, x, addr, &flags))) return; do { |