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SubjectRe: [PATCH 04/31] mm, vmscan: begin reclaiming pages on a per-node basis
> 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 <>
> ---
Acked-by: Hillf Danton <>

> mm/vmscan.c | 79 ++++++++++++++++++++++++++++++++++++++++++-------------------
> 1 file changed, 55 insertions(+), 24 deletions(-)

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