net: CONFIG_COMPAT redux

[safe/jmp/linux-2.6] / include / linux / slub_def.h

diff --git a/include/linux/slub_def.h b/include/linux/slub_def.h
index 71e43a1..1e14beb 100644 (file)
--- a/include/linux/slub_def.h
+++ b/include/linux/slub_def.h
@@ -4,12 +4,14 @@
 /*
  * SLUB : A Slab allocator without object queues.
  *
- * (C) 2007 SGI, Christoph Lameter <clameter@sgi.com>
+ * (C) 2007 SGI, Christoph Lameter
  */
 #include <linux/types.h>
 #include <linux/gfp.h>
 #include <linux/workqueue.h>
 #include <linux/kobject.h>
+#include <linux/kmemtrace.h>
+#include <linux/kmemleak.h>
 
 enum stat_item {
        ALLOC_FASTPATH,         /* Allocation from cpu slab */
@@ -85,9 +87,10 @@ struct kmem_cache {
        struct kmem_cache_order_objects min;
        gfp_t allocflags;       /* gfp flags to use on each alloc */
        int refcount;           /* Refcount for slab cache destroy */
-       void (*ctor)(struct kmem_cache *, void *);
+       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
@@ -120,10 +123,23 @@ 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
@@ -137,9 +153,9 @@ static __always_inline int kmalloc_index(size_t size)
        if (size <= KMALLOC_MIN_SIZE)
                return KMALLOC_SHIFT_LOW;
 
-       if (size > 64 && size <= 96)
+       if (KMALLOC_MIN_SIZE <= 32 && size > 64 && size <= 96)
                return 1;
-       if (size > 128 && size <= 192)
+       if (KMALLOC_MIN_SIZE <= 64 && size > 128 && size <= 192)
                return 2;
        if (size <=          8) return 3;
        if (size <=         16) return 4;
@@ -201,15 +217,33 @@ 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_TRACING
+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);
+
+       kmemleak_alloc(ret, size, 1, flags);
+       trace_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)) {
@@ -218,7 +252,11 @@ 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);
+
+                       trace_kmalloc(_THIS_IP_, ret, size, s->size, flags);
+
+                       return ret;
                }
        }
        return __kmalloc(size, flags);
@@ -228,16 +266,37 @@ 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_TRACING
+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);
+
+               trace_kmalloc_node(_THIS_IP_, ret,
+                                  size, s->size, flags, node);
+
+               return ret;
        }
        return __kmalloc_node(size, flags, node);
 }