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| author | Ingo Molnar <mingo@elte.hu> | 2009-03-28 23:05:50 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-03-28 23:05:50 +0100 |
| commit | b0d44c0dbbd52effb731b1c0af9afd56215c48de (patch) | |
| tree | 3237c0087d91a5390aed05689b9f610ba16fa116 /include/linux/slub_def.h | |
| parent | 9537a48ed4b9e4b738943d6da0a0fd4278adf905 (diff) | |
| parent | 7c730ccdc1188b97f5c8cb690906242c7ed75c22 (diff) | |
| download | linux-b0d44c0dbbd52effb731b1c0af9afd56215c48de.tar.gz linux-b0d44c0dbbd52effb731b1c0af9afd56215c48de.tar.bz2 linux-b0d44c0dbbd52effb731b1c0af9afd56215c48de.zip | |
Merge branch 'linus' into core/iommu
Conflicts:
arch/x86/Kconfig
Diffstat (limited to 'include/linux/slub_def.h')
| -rw-r--r-- | include/linux/slub_def.h | 21 |
1 files changed, 17 insertions, 4 deletions
diff --git a/include/linux/slub_def.h b/include/linux/slub_def.h index 2f5c16b1aacd..e37b6aa8a9fb 100644 --- a/include/linux/slub_def.h +++ b/include/linux/slub_def.h @@ -46,7 +46,6 @@ 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 +88,7 @@ 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 @@ -121,10 +121,23 @@ 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 @@ -212,7 +225,7 @@ static __always_inline void *kmalloc_large(size_t size, gfp_t flags) static __always_inline void *kmalloc(size_t size, gfp_t flags) { if (__builtin_constant_p(size)) { - if (size > PAGE_SIZE) + if (size > SLUB_MAX_SIZE) return kmalloc_large(size, flags); if (!(flags & SLUB_DMA)) { @@ -234,7 +247,7 @@ 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 && !(flags & SLUB_DMA)) { + size <= SLUB_MAX_SIZE && !(flags & SLUB_DMA)) { struct kmem_cache *s = kmalloc_slab(size); if (!s) |