From: Rik van Riel <riel@redhat.com>
Date: Fri, 16 May 2014 04:13:32 +0000 (-0400)
Subject: sched/numa: Decay ->wakee_flips instead of zeroing
X-Git-Tag: omap-for-v3.16/fixes-against-rc1~33^2~19
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=096aa33863a5e48de52d2ff30e0801b7487944f4;p=pandora-kernel.git

sched/numa: Decay ->wakee_flips instead of zeroing

Affine wakeups have the potential to interfere with NUMA placement.
If a task wakes up too many other tasks, affine wakeups will get
disabled.

However, regardless of how many other tasks it wakes up, it gets
re-enabled once a second, potentially interfering with NUMA
placement of other tasks.

By decaying wakee_wakes in half instead of zeroing it, we can avoid
that problem for some workloads.

Signed-off-by: Rik van Riel <riel@redhat.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Cc: chegu_vinod@hp.com
Cc: umgwanakikbuti@gmail.com
Link: http://lkml.kernel.org/r/20140516001332.67f91af2@annuminas.surriel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---

Reading git-diff-tree failed