Re: [PATCH 3/3] mm: Simplify anon_vma refcounts

[Rik van Riel]

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>

Acked-by: Rik van Riel <riel@xxxxxxxxxx>
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