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authorNick Piggin <npiggin@suse.de>2006-02-07 21:58:52 +0100
committerLinus Torvalds <torvalds@g5.osdl.org>2006-02-08 01:12:33 +0100
commit8519fb30e438f8088b71a94a7d5a660a814d3872 (patch)
tree8d29a7b1fa33e5f65e649d363cfa10e83c4fab97 /lib/spinlock_debug.c
parent[PATCH] selinux: require AUDIT (diff)
downloadlinux-8519fb30e438f8088b71a94a7d5a660a814d3872.tar.xz
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[PATCH] mm: compound release fix
Compound pages on SMP systems can now often be freed from pagetables via the release_pages path. This uses put_page_testzero which does not handle compound pages at all. Releasing constituent pages from process mappings decrements their count to a large negative number and leaks the reference at the head page - net result is a memory leak. The problem was hidden because the debug check in put_page_testzero itself actually did take compound pages into consideration. Fix the bug and the debug check. Signed-off-by: Nick Piggin <npiggin@suse.de> Acked-by: Hugh Dickins <hugh@veritas.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'lib/spinlock_debug.c')
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