[PATCH] mm: PageActive no testset
authorNick Piggin <npiggin@suse.de>
Wed, 22 Mar 2006 08:08:00 +0000 (00:08 -0800)
committerLinus Torvalds <torvalds@g5.osdl.org>
Wed, 22 Mar 2006 15:53:57 +0000 (07:53 -0800)
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>
include/linux/page-flags.h
mm/swap.c
mm/vmscan.c

index 58856c823f8b6885d54de0cebd26970d3fc55204..5d1e7bd8510756a1aaf99da16c69ccb81ce7f030 100644 (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)
index 985324ee9368810a765b384a6ac77346ef53b649..cf88226cf96de9da82000a3458cc41cfdeadd362 100644 (file)
--- a/mm/swap.c
+++ b/mm/swap.c
@@ -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)
index 40fb37828e8c4993bbc848b816d84fc279299762..8e477b1a48380ec92171c0d38c1c586cab5f243e 100644 (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)) {