Messages in this thread Patch in this message | | | Subject | sched: Make the rt throtting disabled tunable valid globally | From | Dhaval Giani <> | Date | Fri, 12 Feb 2010 17:49:29 +0100 |
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On setting /proc/sys/kernel/sched_rt_runtime_us to -1, the intended behavior is that rt-group throttling is disabled throughout. This could be confirmed by trying to launch a real time task in a cgroup which had zero rt runtime allotted to it.
This though was not happening when one tried to move a rt task into a rt cgroup which had zero rt runtime. Ensure that this tunable is honoured globally.
Signed-off-by: Dhaval Giani <dhaval.giani@gmail.com>
--- kernel/sched.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
Index: master/kernel/sched.c =================================================================== --- master.orig/kernel/sched.c +++ master/kernel/sched.c @@ -8542,7 +8542,8 @@ static int sched_rt_global_constraints(v int sched_rt_can_attach(struct task_group *tg, struct task_struct *tsk) { /* Don't accept realtime tasks when there is no way for them to run */ - if (rt_task(tsk) && tg->rt_bandwidth.rt_runtime == 0) + if (rt_task(tsk) && rt_bandwidth_enabled() && + tg->rt_bandwidth.rt_runtime == 0) return 0; return 1;
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