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[PATCH] mm: PageActive no testset

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PG_active is protected by zone->lru_lock, it does not need TestSet/TestClear
operations.

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 00:08:00 -08:00 committed by Linus Torvalds
parent 8d438f96d2
commit 4c84cacfa4
3 changed files with 5 additions and 6 deletions
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2
include/linux/page-flags.h
View file

@ -246,8 +246,6 @@ extern void __mod_page_state_offset(unsigned long offset, unsigned long delta);
#define PageActive(page) test_bit(PG_active, &(page)->flags)
#define SetPageActive(page) set_bit(PG_active, &(page)->flags)
#define ClearPageActive(page) clear_bit(PG_active, &(page)->flags)
#define TestClearPageActive(page) test_and_clear_bit(PG_active, &(page)->flags)
#define TestSetPageActive(page) test_and_set_bit(PG_active, &(page)->flags)
#define PageSlab(page) test_bit(PG_slab, &(page)->flags)
#define SetPageSlab(page) set_bit(PG_slab, &(page)->flags)

4
mm/swap.c
View file

@ -374,8 +374,8 @@ void __pagevec_lru_add_active(struct pagevec *pvec)
}
BUG_ON(PageLRU(page));
SetPageLRU(page);
if (TestSetPageActive(page))
BUG();
BUG_ON(PageActive(page));
SetPageActive(page);
add_page_to_active_list(zone, page);
}
if (zone)

5
mm/vmscan.c
View file

@ -1280,8 +1280,9 @@ refill_inactive_zone(struct zone *zone, struct scan_control *sc)
prefetchw_prev_lru_page(page, &l_inactive, flags);
BUG_ON(PageLRU(page));
SetPageLRU(page);
if (!TestClearPageActive(page))
BUG();
BUG_ON(!PageActive(page));
ClearPageActive(page);
list_move(&page->lru, &zone->inactive_list);
pgmoved++;
if (!pagevec_add(&pvec, page)) {