Messages in this thread | | | Date | Thu, 14 May 2009 16:05:07 -0400 (EDT) | From | Christoph Lameter <> | Subject | Re: [PATCH 4/4] zone_reclaim_mode is always 0 by default |
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Not having zone reclaim on a NUMA system often means that per node allocations will fall back. Optimized node local allocations become very difficult for the page allocator. If the latency penalties are not significant then this may not matter. The larger the system, the larger the NUMA latencies become.
One possibility would be to disable zone reclaim for low node numbers. Eanble it only if more than 4 nodes exist?
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