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authorPeter Zijlstra <a.p.zijlstra@chello.nl>2008-08-19 12:33:04 +0200
committerIngo Molnar <mingo@elte.hu>2008-08-19 13:10:10 +0200
commit0b148fa04852859972abbf848177b92daeef138a (patch)
tree12d4b0daa8292fe406871b5aa034d7c9b2fae13d /kernel/sched.c
parent6f0d5c390e4206dcb3804a5072a048fdb7d2b428 (diff)
downloadlwn-0b148fa04852859972abbf848177b92daeef138a.tar.gz
lwn-0b148fa04852859972abbf848177b92daeef138a.zip
sched: rt-bandwidth group disable fixes
More extensive disable of bandwidth control. It allows sysctl_sched_rt_runtime to disable full group bandwidth control. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/sched.c')
-rw-r--r--kernel/sched.c9
1 files changed, 8 insertions, 1 deletions
diff --git a/kernel/sched.c b/kernel/sched.c
index 9a1ddb84e26d..c1bee5fb8154 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -204,11 +204,13 @@ void init_rt_bandwidth(struct rt_bandwidth *rt_b, u64 period, u64 runtime)
rt_b->rt_period_timer.cb_mode = HRTIMER_CB_IRQSAFE_NO_SOFTIRQ;
}
+static inline int rt_bandwidth_enabled(void);
+
static void start_rt_bandwidth(struct rt_bandwidth *rt_b)
{
ktime_t now;
- if (rt_b->rt_runtime == RUNTIME_INF)
+ if (rt_bandwidth_enabled() && rt_b->rt_runtime == RUNTIME_INF)
return;
if (hrtimer_active(&rt_b->rt_period_timer))
@@ -839,6 +841,11 @@ static inline u64 global_rt_runtime(void)
return (u64)sysctl_sched_rt_runtime * NSEC_PER_USEC;
}
+static inline int rt_bandwidth_enabled(void)
+{
+ return sysctl_sched_rt_runtime >= 0;
+}
+
#ifndef prepare_arch_switch
# define prepare_arch_switch(next) do { } while (0)
#endif