slub: Fix up comments

[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 ddb1a706b144036dd1805eac5baa66784adbbc29..b00c1c73eb0a7a3108f2fcc76d4c6fd4ee54fbb8 100644 (file)
--- a/include/linux/slub_def.h
+++ b/include/linux/slub_def.h
@@ -11,12 +11,35 @@
 #include <linux/workqueue.h>
 #include <linux/kobject.h>
 
+enum stat_item {
+       ALLOC_FASTPATH,         /* Allocation from cpu slab */
+       ALLOC_SLOWPATH,         /* Allocation by getting a new cpu slab */
+       FREE_FASTPATH,          /* Free to cpu slub */
+       FREE_SLOWPATH,          /* Freeing not to cpu slab */
+       FREE_FROZEN,            /* Freeing to frozen slab */
+       FREE_ADD_PARTIAL,       /* Freeing moves slab to partial list */
+       FREE_REMOVE_PARTIAL,    /* Freeing removes last object */
+       ALLOC_FROM_PARTIAL,     /* Cpu slab acquired from partial list */
+       ALLOC_SLAB,             /* Cpu slab acquired from page allocator */
+       ALLOC_REFILL,           /* Refill cpu slab from slab freelist */
+       FREE_SLAB,              /* Slab freed to the page allocator */
+       CPUSLAB_FLUSH,          /* Abandoning of the cpu slab */
+       DEACTIVATE_FULL,        /* Cpu slab was full when deactivated */
+       DEACTIVATE_EMPTY,       /* Cpu slab was empty when deactivated */
+       DEACTIVATE_TO_HEAD,     /* Cpu slab was moved to the head of partials */
+       DEACTIVATE_TO_TAIL,     /* Cpu slab was moved to the tail of partials */
+       DEACTIVATE_REMOTE_FREES,/* Slab contained remotely freed objects */
+       NR_SLUB_STAT_ITEMS };
+
 struct kmem_cache_cpu {
        void **freelist;        /* Pointer to first free per cpu object */
        struct page *page;      /* The slab from which we are allocating */
        int node;               /* The node of the page (or -1 for debug) */
        unsigned int offset;    /* Freepointer offset (in word units) */
        unsigned int objsize;   /* Size of an object (from kmem_cache) */
+#ifdef CONFIG_SLUB_STATS
+       unsigned stat[NR_SLUB_STAT_ITEMS];
+#endif
 };
 
 struct kmem_cache_node {
@@ -38,7 +61,7 @@ struct kmem_cache {
        int size;               /* The size of an object including meta data */
        int objsize;            /* The size of an object without meta data */
        int offset;             /* Free pointer offset. */
-       int order;
+       int order;              /* Current preferred allocation order */
 
        /*
         * Avoid an extra cache line for UP, SMP and for the node local to
@@ -48,6 +71,7 @@ struct kmem_cache {
 
        /* Allocation and freeing of slabs */
        int objects;            /* Number of objects in slab */
+       gfp_t allocflags;       /* gfp flags to use on each alloc */
        int refcount;           /* Refcount for slab cache destroy */
        void (*ctor)(struct kmem_cache *, void *);
        int inuse;              /* Offset to metadata */
@@ -87,7 +111,7 @@ struct kmem_cache {
  * 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];
+extern struct kmem_cache kmalloc_caches[PAGE_SHIFT + 1];
 
 /*
  * Sorry that the following has to be that ugly but some versions of GCC
@@ -114,11 +138,11 @@ static __always_inline int kmalloc_index(size_t size)
        if (size <=        512) return 9;
        if (size <=       1024) return 10;
        if (size <=   2 * 1024) return 11;
+       if (size <=   4 * 1024) return 12;
 /*
  * The following is only needed to support architectures with a larger page
  * size than 4k.
  */
-       if (size <=   4 * 1024) return 12;
        if (size <=   8 * 1024) return 13;
        if (size <=  16 * 1024) return 14;
        if (size <=  32 * 1024) return 15;
@@ -165,12 +189,16 @@ 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);
 
+static __always_inline void *kmalloc_large(size_t size, gfp_t flags)
+{
+       return (void *)__get_free_pages(flags | __GFP_COMP, get_order(size));
+}
+
 static __always_inline void *kmalloc(size_t size, gfp_t flags)
 {
        if (__builtin_constant_p(size)) {
-               if (size > PAGE_SIZE / 2)
-                       return (void *)__get_free_pages(flags | __GFP_COMP,
-                                                       get_order(size));
+               if (size > PAGE_SIZE)
+                       return kmalloc_large(size, flags);
 
                if (!(flags & SLUB_DMA)) {
                        struct kmem_cache *s = kmalloc_slab(size);
@@ -191,7 +219,7 @@ void *kmem_cache_alloc_node(struct kmem_cache *, gfp_t flags, int node);
 static __always_inline void *kmalloc_node(size_t size, gfp_t flags, int node)
 {
        if (__builtin_constant_p(size) &&
-               size <= PAGE_SIZE / 2 && !(flags & SLUB_DMA)) {
+               size <= PAGE_SIZE && !(flags & SLUB_DMA)) {
                        struct kmem_cache *s = kmalloc_slab(size);
 
                if (!s)