[lkml]   [2009]   [May]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH 4/4] zone_reclaim_mode is always 0 by default
Christoph Lameter wrote:
> 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?

I suspect that patches 1/4 through 3/4 will cause the
system to behave better already, by only reclaiming
the easiest to reclaim pages from zone reclaim and
falling back after that - or am overlooking something?

 \ /
  Last update: 2009-05-14 22:25    [W:0.076 / U:1.756 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site