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Re: [PATCH 05/34] mm, vmscan: begin reclaiming pages on a per-node basis

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  Re: [PATCH 05/34] mm, vmscan: begin reclaiming pages on a per-node  basis Johannes Weiner <hannes@cmpxchg.org> - 2016-07-12 16:00 +0200

#1441368 — Re: [PATCH 05/34] mm, vmscan: begin reclaiming pages on a per-node basis

On Fri, Jul 08, 2016 at 10:34:41AM +0100, Mel Gorman wrote:
> This patch makes reclaim decisions on a per-node basis.  A reclaimer knows
> what zone is required by the allocation request and skips pages from
> higher zones.  In many cases this will be ok because it's a GFP_HIGHMEM
> request of some description.  On 64-bit, ZONE_DMA32 requests will cause
> some problems but 32-bit devices on 64-bit platforms are increasingly
> rare.  Historically it would have been a major problem on 32-bit with big
> Highmem:Lowmem ratios but such configurations are also now rare and even
> where they exist, they are not encouraged.  If it really becomes a
> problem, it'll manifest as very low reclaim efficiencies.
> 
> Signed-off-by: Mel Gorman <mgorman@techsingularity.net>
> Acked-by: Hillf Danton <hillf.zj@alibaba-inc.com>

Acked-by: Johannes Weiner <hannes@cmpxchg.org>

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