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Merge branch 'for-ingo' of git://git.kernel.org/pub/scm/linux/kernel/git/penberg/slab-2.6 into tracing/kmemtrace

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Conflicts:
	mm/slub.c
This commit is contained in:
Ingo Molnar 2009-02-20 12:15:30 +01:00
commit 057685cf57
2 changed files with 24 additions and 11 deletions
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19
include/linux/slub_def.h
View File

@ -121,11 +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 (PAGE_SIZE)
#define SLUB_PAGE_SHIFT (PAGE_SHIFT + 1)
/*
* 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
@ -231,7 +244,7 @@ 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)) {
@ -275,7 +288,7 @@ 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)

16
mm/slub.c
View File

@ -2506,7 +2506,7 @@ EXPORT_SYMBOL(kmem_cache_destroy);
* Kmalloc subsystem
*******************************************************************/
struct kmem_cache kmalloc_caches[PAGE_SHIFT + 1] __cacheline_aligned;
struct kmem_cache kmalloc_caches[SLUB_PAGE_SHIFT] __cacheline_aligned;
EXPORT_SYMBOL(kmalloc_caches);
static int __init setup_slub_min_order(char *str)
@ -2568,7 +2568,7 @@ panic:
}
#ifdef CONFIG_ZONE_DMA
static struct kmem_cache *kmalloc_caches_dma[PAGE_SHIFT + 1];
static struct kmem_cache *kmalloc_caches_dma[SLUB_PAGE_SHIFT];
static void sysfs_add_func(struct work_struct *w)
{
@ -2690,7 +2690,7 @@ void *__kmalloc(size_t size, gfp_t flags)
struct kmem_cache *s;
void *ret;
if (unlikely(size > PAGE_SIZE))
if (unlikely(size > SLUB_MAX_SIZE))
return kmalloc_large(size, flags);
s = get_slab(size, flags);
@ -2724,7 +2724,7 @@ void *__kmalloc_node(size_t size, gfp_t flags, int node)
struct kmem_cache *s;
void *ret;
if (unlikely(size > PAGE_SIZE)) {
if (unlikely(size > SLUB_MAX_SIZE)) {
ret = kmalloc_large_node(size, flags, node);
kmemtrace_mark_alloc_node(KMEMTRACE_TYPE_KMALLOC,
@ -3039,7 +3039,7 @@ void __init kmem_cache_init(void)
caches++;
}
for (i = KMALLOC_SHIFT_LOW; i <= PAGE_SHIFT; i++) {
for (i = KMALLOC_SHIFT_LOW; i < SLUB_PAGE_SHIFT; i++) {
create_kmalloc_cache(&kmalloc_caches[i],
"kmalloc", 1 << i, GFP_KERNEL);
caches++;
@ -3076,7 +3076,7 @@ void __init kmem_cache_init(void)
slab_state = UP;
/* Provide the correct kmalloc names now that the caches are up */
for (i = KMALLOC_SHIFT_LOW; i <= PAGE_SHIFT; i++)
for (i = KMALLOC_SHIFT_LOW; i < SLUB_PAGE_SHIFT; i++)
kmalloc_caches[i]. name =
kasprintf(GFP_KERNEL, "kmalloc-%d", 1 << i);
@ -3277,7 +3277,7 @@ void *__kmalloc_track_caller(size_t size, gfp_t gfpflags, unsigned long caller)
struct kmem_cache *s;
void *ret;
if (unlikely(size > PAGE_SIZE))
if (unlikely(size > SLUB_MAX_SIZE))
return kmalloc_large(size, gfpflags);
s = get_slab(size, gfpflags);
@ -3300,7 +3300,7 @@ void *__kmalloc_node_track_caller(size_t size, gfp_t gfpflags,
struct kmem_cache *s;
void *ret;
if (unlikely(size > PAGE_SIZE))
if (unlikely(size > SLUB_MAX_SIZE))
return kmalloc_large_node(size, gfpflags, node);
s = get_slab(size, gfpflags);