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authorIngo Molnar <mingo@elte.hu>2007-11-09 22:39:39 +0100
committerIngo Molnar <mingo@elte.hu>2007-11-09 22:39:39 +0100
commit52d3da1ad4f442cec877fbeb83902707b56da0cf (patch)
tree154574a8bfbd77e5484116851b56b85a22ecc06f /kernel
parenta5fbb6d1064be885d2a6b82f625186753cf74848 (diff)
downloadop-kernel-dev-52d3da1ad4f442cec877fbeb83902707b56da0cf.zip
op-kernel-dev-52d3da1ad4f442cec877fbeb83902707b56da0cf.tar.gz
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 <mingo@elte.hu>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/sched.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/sched.c b/kernel/sched.c
index 387258c..4b23dfb 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)
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