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[PATCH] mm: page_alloc less atomics

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More atomic operation removal from page allocator

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 00:08:01 -08:00 • committed by Linus Torvalds
parent 674539115c
commit 5e9dace8d3
2 changed files with 4 additions and 4 deletions
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4
include/linux/page-flags.h
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@ -328,8 +328,8 @@ extern void __mod_page_state_offset(unsigned long offset, unsigned long delta);
#define TestClearPageReclaim(page) test_and_clear_bit(PG_reclaim, &(page)->flags) #define TestClearPageReclaim(page) test_and_clear_bit(PG_reclaim, &(page)->flags)
#define PageCompound(page) test_bit(PG_compound, &(page)->flags) #define PageCompound(page) test_bit(PG_compound, &(page)->flags)
#define SetPageCompound(page) set_bit(PG_compound, &(page)->flags) #define __SetPageCompound(page) __set_bit(PG_compound, &(page)->flags)
#define ClearPageCompound(page) clear_bit(PG_compound, &(page)->flags) #define __ClearPageCompound(page) __clear_bit(PG_compound, &(page)->flags)
#ifdef CONFIG_SWAP #ifdef CONFIG_SWAP
#define PageSwapCache(page) test_bit(PG_swapcache, &(page)->flags) #define PageSwapCache(page) test_bit(PG_swapcache, &(page)->flags)

4
mm/page_alloc.c
View file

@ -190,7 +190,7 @@ static void prep_compound_page(struct page *page, unsigned long order)
for (i = 0; i < nr_pages; i++) { for (i = 0; i < nr_pages; i++) {
struct page *p = page + i; struct page *p = page + i;
SetPageCompound(p); __SetPageCompound(p);
set_page_private(p, (unsigned long)page); set_page_private(p, (unsigned long)page);
} }
} }
@ -209,7 +209,7 @@ static void destroy_compound_page(struct page *page, unsigned long order)
if (unlikely(!PageCompound(p) | if (unlikely(!PageCompound(p) |
(page_private(p) != (unsigned long)page))) (page_private(p) != (unsigned long)page)))
bad_page(page); bad_page(page);
ClearPageCompound(p); __ClearPageCompound(p);
} }
} }