Messages in this thread | | | Date | Thu, 13 Feb 2014 11:11:08 -0500 | From | Rik van Riel <> | Subject | Re: [PATCH 2/2] mm/vmscan: not check compaction_ready on promoted zones |
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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@samsung.com>
Acked-by: Rik van Riel <riel@redhat.com>
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