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| author | Nick Piggin <npiggin@suse.de> | 2006-09-25 23:30:55 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-09-26 08:48:44 -0700 |
| commit | 725d704ecaca4a43f067092c140d4f3271cf2856 (patch) | |
| tree | 320cf8ab5457ac6c01c05da8c30d6026538ee259 /mm/swap.c | |
| parent | a6ca1b99ed434f3fb41bbed647ed36c0420501e5 (diff) | |
| download | linux-stable-725d704ecaca4a43f067092c140d4f3271cf2856.tar.gz linux-stable-725d704ecaca4a43f067092c140d4f3271cf2856.tar.bz2 linux-stable-725d704ecaca4a43f067092c140d4f3271cf2856.zip | |
[PATCH] mm: VM_BUG_ON
Introduce a VM_BUG_ON, which is turned on with CONFIG_DEBUG_VM. Use this
in the lightweight, inline refcounting functions; PageLRU and PageActive
checks in vmscan, because they're pretty well confined to vmscan. And in
page allocate/free fastpaths which can be the hottest parts of the kernel
for kbuilds.
Unlike BUG_ON, VM_BUG_ON must not be used to execute statements with
side-effects, and should not be used outside core mm code.
Signed-off-by: Nick Piggin <npiggin@suse.de>
Cc: Hugh Dickins <hugh@veritas.com>
Cc: Christoph Lameter <clameter@engr.sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'mm/swap.c')
| -rw-r--r-- | mm/swap.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/mm/swap.c b/mm/swap.c index 687686a61f7c..600235e43704 100644 --- a/mm/swap.c +++ b/mm/swap.c @@ -233,7 +233,7 @@ void fastcall __page_cache_release(struct page *page) struct zone *zone = page_zone(page); spin_lock_irqsave(&zone->lru_lock, flags); - BUG_ON(!PageLRU(page)); + VM_BUG_ON(!PageLRU(page)); __ClearPageLRU(page); del_page_from_lru(zone, page); spin_unlock_irqrestore(&zone->lru_lock, flags); @@ -284,7 +284,7 @@ void release_pages(struct page **pages, int nr, int cold) zone = pagezone; spin_lock_irq(&zone->lru_lock); } - BUG_ON(!PageLRU(page)); + VM_BUG_ON(!PageLRU(page)); __ClearPageLRU(page); del_page_from_lru(zone, page); } @@ -337,7 +337,7 @@ void __pagevec_release_nonlru(struct pagevec *pvec) for (i = 0; i < pagevec_count(pvec); i++) { struct page *page = pvec->pages[i]; - BUG_ON(PageLRU(page)); + VM_BUG_ON(PageLRU(page)); if (put_page_testzero(page)) pagevec_add(&pages_to_free, page); } @@ -364,7 +364,7 @@ void __pagevec_lru_add(struct pagevec *pvec) zone = pagezone; spin_lock_irq(&zone->lru_lock); } - BUG_ON(PageLRU(page)); + VM_BUG_ON(PageLRU(page)); SetPageLRU(page); add_page_to_inactive_list(zone, page); } @@ -391,9 +391,9 @@ void __pagevec_lru_add_active(struct pagevec *pvec) zone = pagezone; spin_lock_irq(&zone->lru_lock); } - BUG_ON(PageLRU(page)); + VM_BUG_ON(PageLRU(page)); SetPageLRU(page); - BUG_ON(PageActive(page)); + VM_BUG_ON(PageActive(page)); SetPageActive(page); add_page_to_active_list(zone, page); } |