Li Hua 268f352456 sched/rt: Try to restart rt period timer when rt runtime exceeded ... [ Upstream commit 9b58e976b3 ] When rt_runtime is modified from -1 to a valid control value, it may cause the task to be throttled all the time. Operations like the following will trigger the bug. E.g: 1. echo -1 > /proc/sys/kernel/sched_rt_runtime_us 2. Run a FIFO task named A that executes while(1) 3. echo 950000 > /proc/sys/kernel/sched_rt_runtime_us When rt_runtime is -1, The rt period timer will not be activated when task A enqueued. And then the task will be throttled after setting rt_runtime to 950,000. The task will always be throttled because the rt period timer is not activated. Fixes: d0b27fa778 ("sched: rt-group: synchonised bandwidth period") Reported-by: Hulk Robot <hulkci@huawei.com> Signed-off-by: Li Hua <hucool.lihua@huawei.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lkml.kernel.org/r/20211203033618.11895-1-hucool.lihua@huawei.com Signed-off-by: Sasha Levin <sashal@kernel.org>		2022-01-27 10:53:54 +01:00
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autogroup.c
autogroup.h
clock.c
completion.c
core.c	sched/uclamp: Fix rq->uclamp_max not set on first enqueue	2021-12-08 09:03:27 +01:00
cpuacct.c
cpudeadline.c
cpudeadline.h
cpufreq_schedutil.c
cpufreq.c
cpupri.c
cpupri.h
cputime.c
deadline.c
debug.c
fair.c	sched/fair: Fix per-CPU kthread and wakee stacking for asym CPU capacity	2022-01-27 10:53:53 +01:00
features.h
idle.c
isolation.c
loadavg.c
Makefile
membarrier.c
pelt.c
pelt.h
psi.c
rt.c	sched/rt: Try to restart rt period timer when rt runtime exceeded	2022-01-27 10:53:54 +01:00
sched-pelt.h
sched.h
smp.h
stats.c
stats.h
stop_task.c
swait.c
topology.c
wait_bit.c
wait.c	wait: add wake_up_pollfree()	2021-12-14 11:32:39 +01:00