memcg: show memcg information during OOM

[safe/jmp/linux-2.6] / mm / slab.c

diff --git a/mm/slab.c b/mm/slab.c
index d4b8769..208323f 100644 (file)
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -2123,6 +2123,8 @@ static int __init_refok setup_cpu_cache(struct kmem_cache *cachep)
  *
  * @name must be valid until the cache is destroyed. This implies that
  * the module calling this has to destroy the cache before getting unloaded.
+ * Note that kmem_cache_name() is not guaranteed to return the same pointer,
+ * therefore applications must manage it themselves.
  *
  * The flags are
  *
@@ -2155,7 +2157,7 @@ kmem_cache_create (const char *name, size_t size, size_t align,
 
        /*
         * We use cache_chain_mutex to ensure a consistent view of
-        * cpu_online_map as well.  Please see cpuup_callback
+        * cpu_online_mask as well.  Please see cpuup_callback
         */
        get_online_cpus();
        mutex_lock(&cache_chain_mutex);
@@ -2997,7 +2999,7 @@ retry:
                 * there must be at least one object available for
                 * allocation.
                 */
-               BUG_ON(slabp->inuse < 0 || slabp->inuse >= cachep->num);
+               BUG_ON(slabp->inuse >= cachep->num);
 
                while (slabp->inuse < cachep->num && batchcount--) {
                        STATS_INC_ALLOCED(cachep);
@@ -3106,79 +3108,14 @@ static void *cache_alloc_debugcheck_after(struct kmem_cache *cachep,
 #define cache_alloc_debugcheck_after(a,b,objp,d) (objp)
 #endif
 
-#ifdef CONFIG_FAILSLAB
-
-static struct failslab_attr {
-
-       struct fault_attr attr;
-
-       u32 ignore_gfp_wait;
-#ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
-       struct dentry *ignore_gfp_wait_file;
-#endif
-
-} failslab = {
-       .attr = FAULT_ATTR_INITIALIZER,
-       .ignore_gfp_wait = 1,
-};
-
-static int __init setup_failslab(char *str)
-{
-       return setup_fault_attr(&failslab.attr, str);
-}
-__setup("failslab=", setup_failslab);
-
-static int should_failslab(struct kmem_cache *cachep, gfp_t flags)
+static bool slab_should_failslab(struct kmem_cache *cachep, gfp_t flags)
 {
        if (cachep == &cache_cache)
-               return 0;
-       if (flags & __GFP_NOFAIL)
-               return 0;
-       if (failslab.ignore_gfp_wait && (flags & __GFP_WAIT))
-               return 0;
+               return false;
 
-       return should_fail(&failslab.attr, obj_size(cachep));
+       return should_failslab(obj_size(cachep), flags);
 }
 
-#ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
-
-static int __init failslab_debugfs(void)
-{
-       mode_t mode = S_IFREG | S_IRUSR | S_IWUSR;
-       struct dentry *dir;
-       int err;
-
-       err = init_fault_attr_dentries(&failslab.attr, "failslab");
-       if (err)
-               return err;
-       dir = failslab.attr.dentries.dir;
-
-       failslab.ignore_gfp_wait_file =
-               debugfs_create_bool("ignore-gfp-wait", mode, dir,
-                                     &failslab.ignore_gfp_wait);
-
-       if (!failslab.ignore_gfp_wait_file) {
-               err = -ENOMEM;
-               debugfs_remove(failslab.ignore_gfp_wait_file);
-               cleanup_fault_attr_dentries(&failslab.attr);
-       }
-
-       return err;
-}
-
-late_initcall(failslab_debugfs);
-
-#endif /* CONFIG_FAULT_INJECTION_DEBUG_FS */
-
-#else /* CONFIG_FAILSLAB */
-
-static inline int should_failslab(struct kmem_cache *cachep, gfp_t flags)
-{
-       return 0;
-}
-
-#endif /* CONFIG_FAILSLAB */
-
 static inline void *____cache_alloc(struct kmem_cache *cachep, gfp_t flags)
 {
        void *objp;
@@ -3381,7 +3318,9 @@ __cache_alloc_node(struct kmem_cache *cachep, gfp_t flags, int nodeid,
        unsigned long save_flags;
        void *ptr;
 
-       if (should_failslab(cachep, flags))
+       lockdep_trace_alloc(flags);
+
+       if (slab_should_failslab(cachep, flags))
                return NULL;
 
        cache_alloc_debugcheck_before(cachep, flags);
@@ -3457,7 +3396,9 @@ __cache_alloc(struct kmem_cache *cachep, gfp_t flags, void *caller)
        unsigned long save_flags;
        void *objp;
 
-       if (should_failslab(cachep, flags))
+       lockdep_trace_alloc(flags);
+
+       if (slab_should_failslab(cachep, flags))
                return NULL;
 
        cache_alloc_debugcheck_before(cachep, flags);
@@ -3686,9 +3627,9 @@ void *__kmalloc_node(size_t size, gfp_t flags, int node)
 EXPORT_SYMBOL(__kmalloc_node);
 
 void *__kmalloc_node_track_caller(size_t size, gfp_t flags,
-               int node, void *caller)
+               int node, unsigned long caller)
 {
-       return __do_kmalloc_node(size, flags, node, caller);
+       return __do_kmalloc_node(size, flags, node, (void *)caller);
 }
 EXPORT_SYMBOL(__kmalloc_node_track_caller);
 #else
@@ -3730,9 +3671,9 @@ void *__kmalloc(size_t size, gfp_t flags)
 }
 EXPORT_SYMBOL(__kmalloc);
 
-void *__kmalloc_track_caller(size_t size, gfp_t flags, void *caller)
+void *__kmalloc_track_caller(size_t size, gfp_t flags, unsigned long caller)
 {
-       return __do_kmalloc(size, flags, caller);
+       return __do_kmalloc(size, flags, (void *)caller);
 }
 EXPORT_SYMBOL(__kmalloc_track_caller);
 
@@ -4051,8 +3992,7 @@ static void cache_reap(struct work_struct *w)
        struct kmem_cache *searchp;
        struct kmem_list3 *l3;
        int node = numa_node_id();
-       struct delayed_work *work =
-               container_of(w, struct delayed_work, work);
+       struct delayed_work *work = to_delayed_work(w);
 
        if (!mutex_trylock(&cache_chain_mutex))
                /* Give up. Setup the next iteration. */
@@ -4520,3 +4460,4 @@ size_t ksize(const void *objp)
 
        return obj_size(virt_to_cache(objp));
 }
+EXPORT_SYMBOL(ksize);