Messages in this thread | | | Date | Thu, 10 Jul 2014 08:14:19 -0400 | From | Johannes Weiner <> | Subject | Re: [PATCH 5/6] mm: page_alloc: Abort fair zone allocation policy when remotes nodes are encountered |
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On Wed, Jul 09, 2014 at 09:13:07AM +0100, Mel Gorman wrote: > The purpose of numa_zonelist_order=zone is to preserve lower zones > for use with 32-bit devices. If locality is preferred then the > numa_zonelist_order=node policy should be used. Unfortunately, the fair > zone allocation policy overrides this by skipping zones on remote nodes > until the lower one is found. While this makes sense from a page aging > and performance perspective, it breaks the expected zonelist policy. This > patch restores the expected behaviour for zone-list ordering. > > Signed-off-by: Mel Gorman <mgorman@suse.de>
32-bit NUMA? :-) Anyway, this change also cuts down the fair pass overhead on bigger NUMA machines, so I'm all for it.
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
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