From: Mel Gorman Date: Mon, 7 Oct 2013 10:28:53 +0000 (+0100) Subject: Revert "mm: sched: numa: Delay PTE scanning until a task is scheduled on a new node" X-Git-Tag: omap-for-v3.13/fixes-for-merge-window-take2~40^2~75 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b726b7dfb400c937546fa91cf8523dcb1aa2fc6e;p=pandora-kernel.git Revert "mm: sched: numa: Delay PTE scanning until a task is scheduled on a new node" PTE scanning and NUMA hinting fault handling is expensive so commit 5bca2303 ("mm: sched: numa: Delay PTE scanning until a task is scheduled on a new node") deferred the PTE scan until a task had been scheduled on another node. The problem is that in the purely shared memory case that this may never happen and no NUMA hinting fault information will be captured. We are not ruling out the possibility that something better can be done here but for now, this patch needs to be reverted and depend entirely on the scan_delay to avoid punishing short-lived processes. Signed-off-by: Mel Gorman Reviewed-by: Rik van Riel Cc: Andrea Arcangeli Cc: Johannes Weiner Cc: Srikar Dronamraju Signed-off-by: Peter Zijlstra Link: http://lkml.kernel.org/r/1381141781-10992-16-git-send-email-mgorman@suse.de Signed-off-by: Ingo Molnar --- Reading git-diff-tree failed