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sched: rt-bandwidth group disable fixes

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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>
This commit is contained in:
Peter Zijlstra 2008-08-19 12:33:04 +02:00 committed by Ingo Molnar
parent 6f0d5c390e
commit 0b148fa048
2 changed files with 12 additions and 2 deletions
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9
kernel/sched.c
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@ -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; 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) static void start_rt_bandwidth(struct rt_bandwidth *rt_b)
{ {
ktime_t now; ktime_t now;
if (rt_b->rt_runtime == RUNTIME_INF) if (rt_bandwidth_enabled() && rt_b->rt_runtime == RUNTIME_INF)
return; return;
if (hrtimer_active(&rt_b->rt_period_timer)) 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; 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 #ifndef prepare_arch_switch
# define prepare_arch_switch(next) do { } while (0) # define prepare_arch_switch(next) do { } while (0)
#endif #endif

5
kernel/sched_rt.c
View file

@ -386,7 +386,7 @@ static int do_sched_rt_period_timer(struct rt_bandwidth *rt_b, int overrun)
int i, idle = 1; int i, idle = 1;
cpumask_t span; cpumask_t span;
if (rt_b->rt_runtime == RUNTIME_INF) if (!rt_bandwidth_enabled() || rt_b->rt_runtime == RUNTIME_INF)
return 1; return 1;
span = sched_rt_period_mask(); span = sched_rt_period_mask();
@ -484,6 +484,9 @@ static void update_curr_rt(struct rq *rq)
curr->se.exec_start = rq->clock; curr->se.exec_start = rq->clock;
cpuacct_charge(curr, delta_exec); cpuacct_charge(curr, delta_exec);
if (!rt_bandwidth_enabled())
return;
for_each_sched_rt_entity(rt_se) { for_each_sched_rt_entity(rt_se) {
rt_rq = rt_rq_of_se(rt_se); rt_rq = rt_rq_of_se(rt_se);