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| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2008-08-19 12:33:04 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-08-19 13:10:10 +0200 |
| commit | 0b148fa04852859972abbf848177b92daeef138a (patch) | |
| tree | 12d4b0daa8292fe406871b5aa034d7c9b2fae13d | |
| parent | 6f0d5c390e4206dcb3804a5072a048fdb7d2b428 (diff) | |
| download | blackbird-op-linux-0b148fa04852859972abbf848177b92daeef138a.tar.gz blackbird-op-linux-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>
| -rw-r--r-- | kernel/sched.c | 9 | ||||
| -rw-r--r-- | kernel/sched_rt.c | 5 |
2 files changed, 12 insertions, 2 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 diff --git a/kernel/sched_rt.c b/kernel/sched_rt.c index 77340b04a538..94daace5ee15 100644 --- a/kernel/sched_rt.c +++ b/kernel/sched_rt.c @@ -386,7 +386,7 @@ static int do_sched_rt_period_timer(struct rt_bandwidth *rt_b, int overrun) int i, idle = 1; cpumask_t span; - if (rt_b->rt_runtime == RUNTIME_INF) + if (!rt_bandwidth_enabled() || rt_b->rt_runtime == RUNTIME_INF) return 1; span = sched_rt_period_mask(); @@ -484,6 +484,9 @@ static void update_curr_rt(struct rq *rq) curr->se.exec_start = rq->clock; cpuacct_charge(curr, delta_exec); + if (!rt_bandwidth_enabled()) + return; + for_each_sched_rt_entity(rt_se) { rt_rq = rt_rq_of_se(rt_se); |
