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[PATCH] mm: slab less atomics

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Atomic operation removal from slab

Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Nick Piggin 2006-03-22 00:08:02 -08:00 committed by Linus Torvalds
parent 5e9dace8d3
commit f205b2fe62
2 changed files with 5 additions and 7 deletions
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6
include/linux/page-flags.h
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@ -250,10 +250,8 @@ extern void __mod_page_state_offset(unsigned long offset, unsigned long delta);
#define __ClearPageActive(page) __clear_bit(PG_active, &(page)->flags) #define __ClearPageActive(page) __clear_bit(PG_active, &(page)->flags)
#define PageSlab(page) test_bit(PG_slab, &(page)->flags) #define PageSlab(page) test_bit(PG_slab, &(page)->flags)
#define SetPageSlab(page) set_bit(PG_slab, &(page)->flags) #define __SetPageSlab(page) __set_bit(PG_slab, &(page)->flags)
#define ClearPageSlab(page) clear_bit(PG_slab, &(page)->flags) #define __ClearPageSlab(page) __clear_bit(PG_slab, &(page)->flags)
#define TestClearPageSlab(page) test_and_clear_bit(PG_slab, &(page)->flags)
#define TestSetPageSlab(page) test_and_set_bit(PG_slab, &(page)->flags)
#ifdef CONFIG_HIGHMEM #ifdef CONFIG_HIGHMEM
#define PageHighMem(page) is_highmem(page_zone(page)) #define PageHighMem(page) is_highmem(page_zone(page))

6
mm/slab.c
View file

@ -1402,7 +1402,7 @@ static void *kmem_getpages(struct kmem_cache *cachep, gfp_t flags, int nodeid)
atomic_add(i, &slab_reclaim_pages); atomic_add(i, &slab_reclaim_pages);
add_page_state(nr_slab, i); add_page_state(nr_slab, i);
while (i--) { while (i--) {
SetPageSlab(page); __SetPageSlab(page);
page++; page++;
} }
return addr; return addr;
@ -1418,8 +1418,8 @@ static void kmem_freepages(struct kmem_cache *cachep, void *addr)
const unsigned long nr_freed = i; const unsigned long nr_freed = i;
while (i--) { while (i--) {
if (!TestClearPageSlab(page)) BUG_ON(!PageSlab(page));
BUG(); __ClearPageSlab(page);
page++; page++;
} }
sub_page_state(nr_slab, nr_freed); sub_page_state(nr_slab, nr_freed);