From: Ingo Molnar Date: Fri, 9 Nov 2007 21:39:39 +0000 (+0100) Subject: sched: turn off PREEMPT_RESTRICT X-Git-Url: http://git.efficios.com/?a=commitdiff_plain;h=52d3da1ad4f442cec877fbeb83902707b56da0cf;p=deliverable%2Flinux.git sched: turn off PREEMPT_RESTRICT PREEMPT_RESTRICT was a method aimed at reducing the amount of wakeup related preemption. It has a disadvantage though, it can prevent legitimate wakeups if a task is 'unlucky' to be hit too early by a tick that clears peer_preempt. Now that the wakeup preemption has been cleaned up we dont seem to have excessive preemptions anymore, so this feature can be turned off. (and removed in the next patch) Signed-off-by: Ingo Molnar --- diff --git a/kernel/sched.c b/kernel/sched.c index 387258cdd0b9..4b23dfb4c80f 100644 --- a/kernel/sched.c +++ b/kernel/sched.c @@ -469,7 +469,7 @@ const_debug unsigned int sysctl_sched_features = SCHED_FEAT_TREE_AVG * 0 | SCHED_FEAT_APPROX_AVG * 0 | SCHED_FEAT_WAKEUP_PREEMPT * 1 | - SCHED_FEAT_PREEMPT_RESTRICT * 1; + SCHED_FEAT_PREEMPT_RESTRICT * 0; #define sched_feat(x) (sysctl_sched_features & SCHED_FEAT_##x)