diff options
| author | Ingo Molnar <mingo@elte.hu> | 2008-10-26 18:21:40 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2008-11-06 19:05:50 -0800 |
| commit | 612f39d5e7baeb0518cfe50d53e37e14c0ca1475 (patch) | |
| tree | ad5c684092e8f7886a1ad26d2a5820886e6eb23f /kernel | |
| parent | f20f02abf128336b155c31df5144245d849bea5e (diff) | |
sched: disable the hrtick for now
commit 0c4b83da58ec2e96ce9c44c211d6eac5f9dae478 upstream
sched: disable the hrtick for now
David Miller reported that hrtick update overhead has tripled the
wakeup overhead on Sparc64.
That is too much - disable the HRTICK feature for now by default,
until a faster implementation is found.
Reported-by: David Miller <davem@davemloft.net>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Cc: Chuck Ebbert <cebbert@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/sched_features.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/sched_features.h b/kernel/sched_features.h index 9353ca78154..c4c88ae3ceb 100644 --- a/kernel/sched_features.h +++ b/kernel/sched_features.h @@ -5,7 +5,7 @@ SCHED_FEAT(START_DEBIT, 1) SCHED_FEAT(AFFINE_WAKEUPS, 1) SCHED_FEAT(CACHE_HOT_BUDDY, 1) SCHED_FEAT(SYNC_WAKEUPS, 1) -SCHED_FEAT(HRTICK, 1) +SCHED_FEAT(HRTICK, 0) SCHED_FEAT(DOUBLE_TICK, 0) SCHED_FEAT(ASYM_GRAN, 1) SCHED_FEAT(LB_BIAS, 1) |