oom: dump stack and VM state when oom killer panics

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

diff --git a/mm/slab.c b/mm/slab.c
index a07540e..3f48229 100644 (file)
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -490,7 +490,7 @@ static void **dbg_userword(struct kmem_cache *cachep, void *objp)
 
 #endif
 
-#ifdef CONFIG_KMEMTRACE
+#ifdef CONFIG_TRACING
 size_t slab_buffer_size(struct kmem_cache *cachep)
 {
        return cachep->buffer_size;
@@ -697,7 +697,7 @@ static inline void init_lock_keys(void)
 static DEFINE_MUTEX(cache_chain_mutex);
 static struct list_head cache_chain;
 
-static DEFINE_PER_CPU(struct delayed_work, reap_work);
+static DEFINE_PER_CPU(struct delayed_work, slab_reap_work);
 
 static inline struct array_cache *cpu_cache_get(struct kmem_cache *cachep)
 {
@@ -838,7 +838,7 @@ __setup("noaliencache", noaliencache_setup);
  * objects freed on different nodes from which they were allocated) and the
  * flushing of remote pcps by calling drain_node_pages.
  */
-static DEFINE_PER_CPU(unsigned long, reap_node);
+static DEFINE_PER_CPU(unsigned long, slab_reap_node);
 
 static void init_reap_node(int cpu)
 {
@@ -848,17 +848,17 @@ static void init_reap_node(int cpu)
        if (node == MAX_NUMNODES)
                node = first_node(node_online_map);
 
-       per_cpu(reap_node, cpu) = node;
+       per_cpu(slab_reap_node, cpu) = node;
 }
 
 static void next_reap_node(void)
 {
-       int node = __get_cpu_var(reap_node);
+       int node = __get_cpu_var(slab_reap_node);
 
        node = next_node(node, node_online_map);
        if (unlikely(node >= MAX_NUMNODES))
                node = first_node(node_online_map);
-       __get_cpu_var(reap_node) = node;
+       __get_cpu_var(slab_reap_node) = node;
 }
 
 #else
@@ -875,7 +875,7 @@ static void next_reap_node(void)
  */
 static void __cpuinit start_cpu_timer(int cpu)
 {
-       struct delayed_work *reap_work = &per_cpu(reap_work, cpu);
+       struct delayed_work *reap_work = &per_cpu(slab_reap_work, cpu);
 
        /*
         * When this gets called from do_initcalls via cpucache_init(),
@@ -1039,7 +1039,7 @@ static void __drain_alien_cache(struct kmem_cache *cachep,
  */
 static void reap_alien(struct kmem_cache *cachep, struct kmem_list3 *l3)
 {
-       int node = __get_cpu_var(reap_node);
+       int node = __get_cpu_var(slab_reap_node);
 
        if (l3->alien) {
                struct array_cache *ac = l3->alien[node];
@@ -1300,9 +1300,9 @@ static int __cpuinit cpuup_callback(struct notifier_block *nfb,
                 * anything expensive but will only modify reap_work
                 * and reschedule the timer.
                */
-               cancel_rearming_delayed_work(&per_cpu(reap_work, cpu));
+               cancel_rearming_delayed_work(&per_cpu(slab_reap_work, cpu));
                /* Now the cache_reaper is guaranteed to be not running. */
-               per_cpu(reap_work, cpu).work.func = NULL;
+               per_cpu(slab_reap_work, cpu).work.func = NULL;
                break;
        case CPU_DOWN_FAILED:
        case CPU_DOWN_FAILED_FROZEN:
@@ -3117,13 +3117,19 @@ static inline void *____cache_alloc(struct kmem_cache *cachep, gfp_t flags)
        } else {
                STATS_INC_ALLOCMISS(cachep);
                objp = cache_alloc_refill(cachep, flags);
+               /*
+                * the 'ac' may be updated by cache_alloc_refill(),
+                * and kmemleak_erase() requires its correct value.
+                */
+               ac = cpu_cache_get(cachep);
        }
        /*
         * To avoid a false negative, if an object that is in one of the
         * per-CPU caches is leaked, we need to make sure kmemleak doesn't
         * treat the array pointers as a reference to the object.
         */
-       kmemleak_erase(&ac->entry[ac->avail]);
+       if (objp)
+               kmemleak_erase(&ac->entry[ac->avail]);
        return objp;
 }
 
@@ -3572,7 +3578,7 @@ void *kmem_cache_alloc(struct kmem_cache *cachep, gfp_t flags)
 }
 EXPORT_SYMBOL(kmem_cache_alloc);
 
-#ifdef CONFIG_KMEMTRACE
+#ifdef CONFIG_TRACING
 void *kmem_cache_alloc_notrace(struct kmem_cache *cachep, gfp_t flags)
 {
        return __cache_alloc(cachep, flags, __builtin_return_address(0));
@@ -3635,7 +3641,7 @@ void *kmem_cache_alloc_node(struct kmem_cache *cachep, gfp_t flags, int nodeid)
 }
 EXPORT_SYMBOL(kmem_cache_alloc_node);
 
-#ifdef CONFIG_KMEMTRACE
+#ifdef CONFIG_TRACING
 void *kmem_cache_alloc_node_notrace(struct kmem_cache *cachep,
                                    gfp_t flags,
                                    int nodeid)
@@ -3663,7 +3669,7 @@ __do_kmalloc_node(size_t size, gfp_t flags, int node, void *caller)
        return ret;
 }
 
-#if defined(CONFIG_DEBUG_SLAB) || defined(CONFIG_KMEMTRACE)
+#if defined(CONFIG_DEBUG_SLAB) || defined(CONFIG_TRACING)
 void *__kmalloc_node(size_t size, gfp_t flags, int node)
 {
        return __do_kmalloc_node(size, flags, node,
@@ -3683,7 +3689,7 @@ void *__kmalloc_node(size_t size, gfp_t flags, int node)
        return __do_kmalloc_node(size, flags, node, NULL);
 }
 EXPORT_SYMBOL(__kmalloc_node);
-#endif /* CONFIG_DEBUG_SLAB */
+#endif /* CONFIG_DEBUG_SLAB || CONFIG_TRACING */
 #endif /* CONFIG_NUMA */
 
 /**
@@ -3715,7 +3721,7 @@ static __always_inline void *__do_kmalloc(size_t size, gfp_t flags,
 }
 
 
-#if defined(CONFIG_DEBUG_SLAB) || defined(CONFIG_KMEMTRACE)
+#if defined(CONFIG_DEBUG_SLAB) || defined(CONFIG_TRACING)
 void *__kmalloc(size_t size, gfp_t flags)
 {
        return __do_kmalloc(size, flags, __builtin_return_address(0));