]> pilppa.com Git - linux-2.6-omap-h63xx.git/commit
memory unplug: isolate_lru_page fix
authorKAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Thu, 26 Jul 2007 17:41:08 +0000 (10:41 -0700)
committerLinus Torvalds <torvalds@woody.linux-foundation.org>
Thu, 26 Jul 2007 18:35:17 +0000 (11:35 -0700)
commit3dd9fe8c397df68086e6a1b2160573abbe944813
tree86dda41ade146e2a403151c7ba2f7e32a930bc63
parentdc386d4d1e98bb39fb967ee156cd456c802fc692
memory unplug: isolate_lru_page fix

release_pages() in mm/swap.c changes page_count() to be 0 without removing
PageLRU flag...

This means isolate_lru_page() can see a page, PageLRU() &&
page_count(page)==0..  This is BUG.  (get_page() will be called against
count=0 page.)

Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Acked-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
mm/migrate.c