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| author | Mike Galbraith <efault@gmx.de> | 2009-10-09 08:35:03 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-10-09 15:58:11 +0200 |
| commit | f5dc37530ba8a35aae0f7f4f13781d1904f71e94 (patch) | |
| tree | 866894f6bf41876a7c6096912c82e73d140d3071 /arch/x86 | |
| parent | 36a07902c2134649c4af7f07980413ffb1a56085 (diff) | |
| download | linux-f5dc37530ba8a35aae0f7f4f13781d1904f71e94.tar.gz linux-f5dc37530ba8a35aae0f7f4f13781d1904f71e94.tar.bz2 linux-f5dc37530ba8a35aae0f7f4f13781d1904f71e94.zip | |
sched: Update the clock of runqueue select_task_rq() selected
In try_to_wake_up(), we update the runqueue clock, but
select_task_rq() may select a different runqueue than the one we
updated, leaving the new runqueue's clock stale for a bit.
This patch cures occasional huge latencies reported by latencytop
when coming out of idle on a mostly idle NO_HZ box.
Signed-off-by: Mike Galbraith <efault@gmx.de>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <1255070103.7639.30.camel@marge.simson.net>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86')
0 files changed, 0 insertions, 0 deletions