Re: [PATCH 2/2] mm/vmscan: not check compaction_ready on promoted zones

[Rik van Riel]

On 02/12/2014 09:41 PM, Weijie Yang wrote:
> We abort direct reclaim if find the zone is ready for compaction.
> 
> Sometimes the zone is just a promoted highmem zone to force scan
> pinning highmem, which is not the intended zone the caller want to
> alloc page from. In this situation, setting aborted_reclaim to
> indicate the caller turn back to retry allocation is waste of time
> and could cause a loop in __alloc_pages_slowpath().
> 
> This patch do not check compaction_ready() on promoted zones to avoid
> the above situation, only set aborted_reclaim if the caller intended
> zone is ready to compaction.
> 
> Signed-off-by: Weijie Yang <weijie.yang@xxxxxxxxxxx>

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


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