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authorNick Piggin <npiggin@suse.de>2006-01-19 04:42:27 +0300
committerLinus Torvalds <torvalds@g5.osdl.org>2006-01-19 06:20:17 +0300
commit053837fce7aa79025ed57656855df09f80175527 (patch)
tree05d7615894131a368fc4943f641b11acdd2ae694 /include/linux/swap.h
parente236a166b2bc437769a9b8b5d19186a3761bde48 (diff)
downloadlinux-053837fce7aa79025ed57656855df09f80175527.tar.xz
[PATCH] mm: migration page refcounting fix
Migration code currently does not take a reference to target page properly, so between unlocking the pte and trying to take a new reference to the page with isolate_lru_page, anything could happen to it. Fix this by holding the pte lock until we get a chance to elevate the refcount. Other small cleanups while we're here. Signed-off-by: Nick Piggin <npiggin@suse.de> Signed-off-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/linux/swap.h')
-rw-r--r--include/linux/swap.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/swap.h b/include/linux/swap.h
index e92054d6530b..d01f7efb0f2c 100644
--- a/include/linux/swap.h
+++ b/include/linux/swap.h
@@ -167,6 +167,7 @@ extern void FASTCALL(lru_cache_add_active(struct page *));
extern void FASTCALL(activate_page(struct page *));
extern void FASTCALL(mark_page_accessed(struct page *));
extern void lru_add_drain(void);
+extern int lru_add_drain_all(void);
extern int rotate_reclaimable_page(struct page *page);
extern void swap_setup(void);