Messages in this thread | | | From | "Hillf Danton" <> | Subject | Re: [PATCH 04/31] mm, vmscan: begin reclaiming pages on a per-node basis | Date | Tue, 05 Jul 2016 11:17:51 +0800 |
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> > 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>
> mm/vmscan.c | 79 ++++++++++++++++++++++++++++++++++++++++++------------------- > 1 file changed, 55 insertions(+), 24 deletions(-)
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