> > 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 <mgor...@techsingularity.net> > --- Acked-by: Hillf Danton <hillf...@alibaba-inc.com>
> mm/vmscan.c | 79 > ++++++++++++++++++++++++++++++++++++++++++------------------- > 1 file changed, 55 insertions(+), 24 deletions(-)
