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authorPeter Zijlstra <a.p.zijlstra@chello.nl>2011-03-22 16:32:49 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2011-03-22 17:44:03 -0700
commit01d8b20dec5f4019283e244aba50ba86fe6ead6e (patch)
tree738a2e675547de61f74d6f4019dd5830c40446dd /include/linux/page-flags.h
parentmm: move anon_vma ref out from under CONFIG_foo (diff)
downloadlinux-dev-01d8b20dec5f4019283e244aba50ba86fe6ead6e.tar.xz
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mm: simplify anon_vma refcounts
This patch changes the anon_vma refcount to be 0 when the object is free. It does this by adding 1 ref to being in use in the anon_vma structure (iow. the anon_vma->head list is not empty). This allows a simpler release scheme without having to check both the refcount and the list as well as avoids taking a ref for each entry on the list. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Acked-by: Hugh Dickins <hughd@google.com> Acked-by: Mel Gorman <mel@csn.ul.ie> Acked-by: Rik van Riel <riel@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/page-flags.h')
0 files changed, 0 insertions, 0 deletions