From: Ingo Molnar <mingo@elte.hu>
Date: Thu, 23 Aug 2007 13:18:02 +0000 (+0200)
Subject: sched: tweak the sched_runtime_limit tunable
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=505c0efd58031923ae01deac16d896607cafa70e;p=deliverable%2Flinux.git

sched: tweak the sched_runtime_limit tunable

Michael Gerdau reported reniced task CPU usage weirdnesses.
Such symptoms can be caused by limit underruns so double the
sched_runtime_limit.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
---

diff --git a/kernel/sched.c b/kernel/sched.c
index a4b22d93e00d..96e9b82246d2 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -4923,7 +4923,7 @@ static inline void sched_init_granularity(void)
 	if (sysctl_sched_granularity > gran_limit)
 		sysctl_sched_granularity = gran_limit;
 
-	sysctl_sched_runtime_limit = sysctl_sched_granularity * 4;
+	sysctl_sched_runtime_limit = sysctl_sched_granularity * 8;
 	sysctl_sched_wakeup_granularity = sysctl_sched_granularity / 2;
 }