Merge branch 'tracing/core-v2' into tracing-for-linus

[linux-2.6-omap-h63xx.git] / include / linux / slub_def.h

diff --git a/include/linux/slub_def.h b/include/linux/slub_def.h
index 2f5c16b1aacd3d7bd83a50d90fcba527017a0373..a1f90528e70bf5e3e637b95549b4e08e62cbbec2 100644 (file)
--- a/include/linux/slub_def.h
+++ b/include/linux/slub_def.h
@@ -10,6 +10,7 @@
 #include <linux/gfp.h>
 #include <linux/workqueue.h>
 #include <linux/kobject.h>
+#include <trace/kmemtrace.h>
 
 enum stat_item {
        ALLOC_FASTPATH,         /* Allocation from cpu slab */
@@ -46,7 +47,6 @@ struct kmem_cache_cpu {
 struct kmem_cache_node {
        spinlock_t list_lock;   /* Protect partial list and nr_partial */
        unsigned long nr_partial;
-       unsigned long min_partial;
        struct list_head partial;
 #ifdef CONFIG_SLUB_DEBUG
        atomic_long_t nr_slabs;
@@ -89,6 +89,7 @@ struct kmem_cache {
        void (*ctor)(void *);
        int inuse;              /* Offset to metadata */
        int align;              /* Alignment */
+       unsigned long min_partial;
        const char *name;       /* Name (only for display!) */
        struct list_head list;  /* List of slab caches */
 #ifdef CONFIG_SLUB_DEBUG
@@ -120,11 +121,24 @@ struct kmem_cache {
 
 #define KMALLOC_SHIFT_LOW ilog2(KMALLOC_MIN_SIZE)
 
+/*
+ * Maximum kmalloc object size handled by SLUB. Larger object allocations
+ * are passed through to the page allocator. The page allocator "fastpath"
+ * is relatively slow so we need this value sufficiently high so that
+ * performance critical objects are allocated through the SLUB fastpath.
+ *
+ * This should be dropped to PAGE_SIZE / 2 once the page allocator
+ * "fastpath" becomes competitive with the slab allocator fastpaths.
+ */
+#define SLUB_MAX_SIZE (2 * PAGE_SIZE)
+
+#define SLUB_PAGE_SHIFT (PAGE_SHIFT + 2)
+
 /*
  * We keep the general caches in an array of slab caches that are used for
  * 2^x bytes of allocations.
  */
-extern struct kmem_cache kmalloc_caches[PAGE_SHIFT + 1];
+extern struct kmem_cache kmalloc_caches[SLUB_PAGE_SHIFT];
 
 /*
  * Sorry that the following has to be that ugly but some versions of GCC
@@ -204,15 +218,33 @@ static __always_inline struct kmem_cache *kmalloc_slab(size_t size)
 void *kmem_cache_alloc(struct kmem_cache *, gfp_t);
 void *__kmalloc(size_t size, gfp_t flags);
 
+#ifdef CONFIG_KMEMTRACE
+extern void *kmem_cache_alloc_notrace(struct kmem_cache *s, gfp_t gfpflags);
+#else
+static __always_inline void *
+kmem_cache_alloc_notrace(struct kmem_cache *s, gfp_t gfpflags)
+{
+       return kmem_cache_alloc(s, gfpflags);
+}
+#endif
+
 static __always_inline void *kmalloc_large(size_t size, gfp_t flags)
 {
-       return (void *)__get_free_pages(flags | __GFP_COMP, get_order(size));
+       unsigned int order = get_order(size);
+       void *ret = (void *) __get_free_pages(flags | __GFP_COMP, order);
+
+       kmemtrace_mark_alloc(KMEMTRACE_TYPE_KMALLOC, _THIS_IP_, ret,
+                            size, PAGE_SIZE << order, flags);
+
+       return ret;
 }
 
 static __always_inline void *kmalloc(size_t size, gfp_t flags)
 {
+       void *ret;
+
        if (__builtin_constant_p(size)) {
-               if (size > PAGE_SIZE)
+               if (size > SLUB_MAX_SIZE)
                        return kmalloc_large(size, flags);
 
                if (!(flags & SLUB_DMA)) {
@@ -221,7 +253,13 @@ static __always_inline void *kmalloc(size_t size, gfp_t flags)
                        if (!s)
                                return ZERO_SIZE_PTR;
 
-                       return kmem_cache_alloc(s, flags);
+                       ret = kmem_cache_alloc_notrace(s, flags);
+
+                       kmemtrace_mark_alloc(KMEMTRACE_TYPE_KMALLOC,
+                                            _THIS_IP_, ret,
+                                            size, s->size, flags);
+
+                       return ret;
                }
        }
        return __kmalloc(size, flags);
@@ -231,16 +269,38 @@ static __always_inline void *kmalloc(size_t size, gfp_t flags)
 void *__kmalloc_node(size_t size, gfp_t flags, int node);
 void *kmem_cache_alloc_node(struct kmem_cache *, gfp_t flags, int node);
 
+#ifdef CONFIG_KMEMTRACE
+extern void *kmem_cache_alloc_node_notrace(struct kmem_cache *s,
+                                          gfp_t gfpflags,
+                                          int node);
+#else
+static __always_inline void *
+kmem_cache_alloc_node_notrace(struct kmem_cache *s,
+                             gfp_t gfpflags,
+                             int node)
+{
+       return kmem_cache_alloc_node(s, gfpflags, node);
+}
+#endif
+
 static __always_inline void *kmalloc_node(size_t size, gfp_t flags, int node)
 {
+       void *ret;
+
        if (__builtin_constant_p(size) &&
-               size <= PAGE_SIZE && !(flags & SLUB_DMA)) {
+               size <= SLUB_MAX_SIZE && !(flags & SLUB_DMA)) {
                        struct kmem_cache *s = kmalloc_slab(size);
 
                if (!s)
                        return ZERO_SIZE_PTR;
 
-               return kmem_cache_alloc_node(s, flags, node);
+               ret = kmem_cache_alloc_node_notrace(s, flags, node);
+
+               kmemtrace_mark_alloc_node(KMEMTRACE_TYPE_KMALLOC,
+                                         _THIS_IP_, ret,
+                                         size, s->size, flags, node);
+
+               return ret;
        }
        return __kmalloc_node(size, flags, node);
 }