From a0c5e813f087dffc0d9b173d2e7d3328b1482fd5 Mon Sep 17 00:00:00 2001 From: Hugh Dickins Date: Mon, 8 Oct 2012 16:33:21 -0700 Subject: mm: remove free_page_mlock We should not be seeing non-0 unevictable_pgs_mlockfreed any longer. So remove free_page_mlock() from the page freeing paths: __PG_MLOCKED is already in PAGE_FLAGS_CHECK_AT_FREE, so free_pages_check() will now be checking it, reporting "BUG: Bad page state" if it's ever found set. Comment UNEVICTABLE_MLOCKFREED and unevictable_pgs_mlockfreed always 0. Signed-off-by: Hugh Dickins Acked-by: Mel Gorman Cc: Rik van Riel Cc: Johannes Weiner Cc: Michel Lespinasse Cc: Ying Han Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/page_alloc.c | 17 ----------------- mm/vmstat.c | 2 +- 2 files changed, 1 insertion(+), 18 deletions(-) (limited to 'mm') diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 00750bc08a3..dbb53866c3a 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -598,17 +598,6 @@ out: zone->free_area[order].nr_free++; } -/* - * free_page_mlock() -- clean up attempts to free and mlocked() page. - * Page should not be on lru, so no need to fix that up. - * free_pages_check() will verify... - */ -static inline void free_page_mlock(struct page *page) -{ - __dec_zone_page_state(page, NR_MLOCK); - __count_vm_event(UNEVICTABLE_MLOCKFREED); -} - static inline int free_pages_check(struct page *page) { if (unlikely(page_mapcount(page) | @@ -728,15 +717,12 @@ static bool free_pages_prepare(struct page *page, unsigned int order) static void __free_pages_ok(struct page *page, unsigned int order) { unsigned long flags; - int wasMlocked = __TestClearPageMlocked(page); int migratetype; if (!free_pages_prepare(page, order)) return; local_irq_save(flags); - if (unlikely(wasMlocked)) - free_page_mlock(page); __count_vm_events(PGFREE, 1 << order); migratetype = get_pageblock_migratetype(page); set_freepage_migratetype(page, migratetype); @@ -1310,7 +1296,6 @@ void free_hot_cold_page(struct page *page, int cold) struct per_cpu_pages *pcp; unsigned long flags; int migratetype; - int wasMlocked = __TestClearPageMlocked(page); if (!free_pages_prepare(page, 0)) return; @@ -1318,8 +1303,6 @@ void free_hot_cold_page(struct page *page, int cold) migratetype = get_pageblock_migratetype(page); set_freepage_migratetype(page, migratetype); local_irq_save(flags); - if (unlikely(wasMlocked)) - free_page_mlock(page); __count_vm_event(PGFREE); /* diff --git a/mm/vmstat.c b/mm/vmstat.c index acbd85c983e..05e3a991374 100644 --- a/mm/vmstat.c +++ b/mm/vmstat.c @@ -782,7 +782,7 @@ const char * const vmstat_text[] = { "unevictable_pgs_munlocked", "unevictable_pgs_cleared", "unevictable_pgs_stranded", - "unevictable_pgs_mlockfreed", + "unevictable_pgs_mlockfreed", /* no longer useful: always zero */ #ifdef CONFIG_TRANSPARENT_HUGEPAGE "thp_fault_alloc", -- cgit v1.2.3