Merge branches 'topic/documentation', 'topic/slub/fixes' and 'topic/urgent' into...

[sfrench/cifs-2.6.git] / mm / slub.c

diff --git a/mm/slub.c b/mm/slub.c
index c4ea9158c9fbd0e4630062aa0098406000be45c3..65ffda5934b09b8220e9a00332945dc19ba88de6 100644 (file)
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -9,6 +9,7 @@
  */
 
 #include <linux/mm.h>
+#include <linux/swap.h> /* struct reclaim_state */
 #include <linux/module.h>
 #include <linux/bit_spinlock.h>
 #include <linux/interrupt.h>
@@ -16,6 +17,7 @@
 #include <linux/slab.h>
 #include <linux/proc_fs.h>
 #include <linux/seq_file.h>
+#include <trace/kmemtrace.h>
 #include <linux/cpu.h>
 #include <linux/cpuset.h>
 #include <linux/mempolicy.h>
@@ -1169,6 +1171,8 @@ static void __free_slab(struct kmem_cache *s, struct page *page)
 
        __ClearPageSlab(page);
        reset_page_mapcount(page);
+       if (current->reclaim_state)
+               current->reclaim_state->reclaimed_slab += pages;
        __free_pages(page, order);
 }
 
@@ -1618,18 +1622,45 @@ static __always_inline void *slab_alloc(struct kmem_cache *s,
 
 void *kmem_cache_alloc(struct kmem_cache *s, gfp_t gfpflags)
 {
-       return slab_alloc(s, gfpflags, -1, _RET_IP_);
+       void *ret = slab_alloc(s, gfpflags, -1, _RET_IP_);
+
+       trace_kmem_cache_alloc(_RET_IP_, ret, s->objsize, s->size, gfpflags);
+
+       return ret;
 }
 EXPORT_SYMBOL(kmem_cache_alloc);
 
+#ifdef CONFIG_KMEMTRACE
+void *kmem_cache_alloc_notrace(struct kmem_cache *s, gfp_t gfpflags)
+{
+       return slab_alloc(s, gfpflags, -1, _RET_IP_);
+}
+EXPORT_SYMBOL(kmem_cache_alloc_notrace);
+#endif
+
 #ifdef CONFIG_NUMA
 void *kmem_cache_alloc_node(struct kmem_cache *s, gfp_t gfpflags, int node)
 {
-       return slab_alloc(s, gfpflags, node, _RET_IP_);
+       void *ret = slab_alloc(s, gfpflags, node, _RET_IP_);
+
+       trace_kmem_cache_alloc_node(_RET_IP_, ret,
+                                   s->objsize, s->size, gfpflags, node);
+
+       return ret;
 }
 EXPORT_SYMBOL(kmem_cache_alloc_node);
 #endif
 
+#ifdef CONFIG_KMEMTRACE
+void *kmem_cache_alloc_node_notrace(struct kmem_cache *s,
+                                   gfp_t gfpflags,
+                                   int node)
+{
+       return slab_alloc(s, gfpflags, node, _RET_IP_);
+}
+EXPORT_SYMBOL(kmem_cache_alloc_node_notrace);
+#endif
+
 /*
  * Slow patch handling. This may still be called frequently since objects
  * have a longer lifetime than the cpu slabs in most processing loads.
@@ -1737,6 +1768,8 @@ void kmem_cache_free(struct kmem_cache *s, void *x)
        page = virt_to_head_page(x);
 
        slab_free(s, page, x, _RET_IP_);
+
+       trace_kmem_cache_free(_RET_IP_, x);
 }
 EXPORT_SYMBOL(kmem_cache_free);
 
@@ -1879,7 +1912,7 @@ static inline int calculate_order(int size)
         * Doh this slab cannot be placed using slub_max_order.
         */
        order = slab_order(size, 1, MAX_ORDER, 1);
-       if (order <= MAX_ORDER)
+       if (order < MAX_ORDER)
                return order;
        return -ENOSYS;
 }
@@ -2492,6 +2525,7 @@ __setup("slub_min_order=", setup_slub_min_order);
 static int __init setup_slub_max_order(char *str)
 {
        get_option(&str, &slub_max_order);
+       slub_max_order = min(slub_max_order, MAX_ORDER - 1);
 
        return 1;
 }
@@ -2659,6 +2693,7 @@ static struct kmem_cache *get_slab(size_t size, gfp_t flags)
 void *__kmalloc(size_t size, gfp_t flags)
 {
        struct kmem_cache *s;
+       void *ret;
 
        if (unlikely(size > SLUB_MAX_SIZE))
                return kmalloc_large(size, flags);
@@ -2668,7 +2703,11 @@ void *__kmalloc(size_t size, gfp_t flags)
        if (unlikely(ZERO_OR_NULL_PTR(s)))
                return s;
 
-       return slab_alloc(s, flags, -1, _RET_IP_);
+       ret = slab_alloc(s, flags, -1, _RET_IP_);
+
+       trace_kmalloc(_RET_IP_, ret, size, s->size, flags);
+
+       return ret;
 }
 EXPORT_SYMBOL(__kmalloc);
 
@@ -2687,16 +2726,28 @@ static void *kmalloc_large_node(size_t size, gfp_t flags, int node)
 void *__kmalloc_node(size_t size, gfp_t flags, int node)
 {
        struct kmem_cache *s;
+       void *ret;
 
-       if (unlikely(size > SLUB_MAX_SIZE))
-               return kmalloc_large_node(size, flags, node);
+       if (unlikely(size > SLUB_MAX_SIZE)) {
+               ret = kmalloc_large_node(size, flags, node);
+
+               trace_kmalloc_node(_RET_IP_, ret,
+                                  size, PAGE_SIZE << get_order(size),
+                                  flags, node);
+
+               return ret;
+       }
 
        s = get_slab(size, flags);
 
        if (unlikely(ZERO_OR_NULL_PTR(s)))
                return s;
 
-       return slab_alloc(s, flags, node, _RET_IP_);
+       ret = slab_alloc(s, flags, node, _RET_IP_);
+
+       trace_kmalloc_node(_RET_IP_, ret, size, s->size, flags, node);
+
+       return ret;
 }
 EXPORT_SYMBOL(__kmalloc_node);
 #endif
@@ -2745,6 +2796,8 @@ void kfree(const void *x)
        struct page *page;
        void *object = (void *)x;
 
+       trace_kfree(_RET_IP_, x);
+
        if (unlikely(ZERO_OR_NULL_PTR(x)))
                return;
 
@@ -3224,6 +3277,7 @@ static struct notifier_block __cpuinitdata slab_notifier = {
 void *__kmalloc_track_caller(size_t size, gfp_t gfpflags, unsigned long caller)
 {
        struct kmem_cache *s;
+       void *ret;
 
        if (unlikely(size > SLUB_MAX_SIZE))
                return kmalloc_large(size, gfpflags);
@@ -3233,13 +3287,19 @@ void *__kmalloc_track_caller(size_t size, gfp_t gfpflags, unsigned long caller)
        if (unlikely(ZERO_OR_NULL_PTR(s)))
                return s;
 
-       return slab_alloc(s, gfpflags, -1, caller);
+       ret = slab_alloc(s, gfpflags, -1, caller);
+
+       /* Honor the call site pointer we recieved. */
+       trace_kmalloc(caller, ret, size, s->size, gfpflags);
+
+       return ret;
 }
 
 void *__kmalloc_node_track_caller(size_t size, gfp_t gfpflags,
                                        int node, unsigned long caller)
 {
        struct kmem_cache *s;
+       void *ret;
 
        if (unlikely(size > SLUB_MAX_SIZE))
                return kmalloc_large_node(size, gfpflags, node);
@@ -3249,7 +3309,12 @@ void *__kmalloc_node_track_caller(size_t size, gfp_t gfpflags,
        if (unlikely(ZERO_OR_NULL_PTR(s)))
                return s;
 
-       return slab_alloc(s, gfpflags, node, caller);
+       ret = slab_alloc(s, gfpflags, node, caller);
+
+       /* Honor the call site pointer we recieved. */
+       trace_kmalloc_node(caller, ret, size, s->size, gfpflags, node);
+
+       return ret;
 }
 
 #ifdef CONFIG_SLUB_DEBUG