On 02/18/2011 08:44 AM, Peter Zijlstra wrote:
Subject: mm: Simplify anon_vma refcounts From: Peter Zijlstra<a.p.zijlstra@xxxxxxxxx> Date: Fri, 26 Nov 2010 15:38:49 +0100 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. Reviewed-by: KAMEZAWA Hiroyuki<kamezawa.hiroyu@xxxxxxxxxxxxxx> Acked-by: Hugh Dickins<hughd@xxxxxxxxxx> Signed-off-by: Peter Zijlstra<a.p.zijlstra@xxxxxxxxx>
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