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From: Rik van Riel on 19 Feb 2010 11:50
On 02/18/2010 01:02 PM, Mel Gorman wrote:
> rmap_walk_anon() was triggering errors in memory compaction that looks like
> use-after-free errors in anon_vma. The problem appears to be that between
> the page being isolated from the LRU and rcu_read_lock() being taken, the
> mapcount of the page dropped to 0 and the anon_vma was freed. This patch
> skips the migration of anon pages that are not mapped by anyone.
>
> Signed-off-by: Mel Gorman<mel(a)csn.ul.ie>

Acked-by: Rik van Riel <riel(a)redhat.com>

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