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authorPeter Zijlstra <a.p.zijlstra@chello.nl>2010-07-09 15:12:27 +0200
committerIngo Molnar <mingo@elte.hu>2010-07-17 12:05:44 +0200
commit396e894d289d69bacf5acd983c97cd6e21a14c08 (patch)
treeec3e3ba19e332a799e1229f62663625d9c7583dd /kernel/sched.c
parentf469461df6ff822f71b8737bda86eea20f16ff93 (diff)
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sched: Revert nohz_ratelimit() for now
Norbert reported that nohz_ratelimit() causes his laptop to burn about 4W (40%) extra. For now back out the change and see if we can adjust the power management code to make better decisions. Reported-by: Norbert Preining <preining@logic.at> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Acked-by: Mike Galbraith <efault@gmx.de> Cc: Arjan van de Ven <arjan@infradead.org> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/sched.c')
-rw-r--r--kernel/sched.c10
1 files changed, 0 insertions, 10 deletions
diff --git a/kernel/sched.c b/kernel/sched.c
index f52a8801b7a..63b4a14682f 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -1232,16 +1232,6 @@ void wake_up_idle_cpu(int cpu)
smp_send_reschedule(cpu);
}
-int nohz_ratelimit(int cpu)
-{
- struct rq *rq = cpu_rq(cpu);
- u64 diff = rq->clock - rq->nohz_stamp;
-
- rq->nohz_stamp = rq->clock;
-
- return diff < (NSEC_PER_SEC / HZ) >> 1;
-}
-
#endif /* CONFIG_NO_HZ */
static u64 sched_avg_period(void)