On 2021-02-02 10:00:10 [+0100], Jonathan Schwender wrote: > If nohz_full is enabled (more precisely HK_FLAG_TIMER is set), then > do_sched_rt_period_timer may be called on a housekeeping CPU, > which would not service the isolated CPU for a non-root cgroup > (requires a kernel with RT_GROUP_SCHEDULING). > This causes RT tasks in a non-root cgroup to get throttled > indefinitely (unless throttling is disabled) once the timer has > been moved to a housekeeping CPU. > To fix this, housekeeping CPUs now service all online CPUs > if HK_FLAG_TIMER (nohz_full) is set. This originates from https://lore.kernel.org/linux-rt-users/b07b6fc7-1a5f-0dcc-ca65-821de96cd8b4@xxxxxxxxx/ Could someone please take a look? Sebastian
