Re: [PATCH v2 0/4] sched/fair: Active balancer RT/DL preemption fix

2019-10-01 Thread Valentin Schneider
Hi Juri, On 01/10/2019 14:31, Juri Lelli wrote: > Hi Valentin, > > On 01/10/19 11:29, Valentin Schneider wrote: >> (expanded the Cc list) >> RT/DL folks, any thought on the thing? > > Even if I like your idea and it looks theoretically the right thing to > do, I'm not sure we want it in

Re: [PATCH v2 0/4] sched/fair: Active balancer RT/DL preemption fix

2019-10-01 Thread Juri Lelli
Hi Valentin, On 01/10/19 11:29, Valentin Schneider wrote: > (expanded the Cc list) > RT/DL folks, any thought on the thing? Even if I like your idea and it looks theoretically the right thing to do, I'm not sure we want it in practice if it adds complexity to CFS. I personally never noticed

Re: [PATCH v2 0/4] sched/fair: Active balancer RT/DL preemption fix

2019-10-01 Thread Valentin Schneider
(expanded the Cc list) RT/DL folks, any thought on the thing? On 15/08/2019 15:51, Valentin Schneider wrote: > Vincent's load balance rework [1] got me thinking about how and where we > use rq.nr_running vs rq.cfs.h_nr_running checks, and this lead me to > stare intently at the active load

[PATCH v2 0/4] sched/fair: Active balancer RT/DL preemption fix

2019-08-15 Thread Valentin Schneider
Vincent's load balance rework [1] got me thinking about how and where we use rq.nr_running vs rq.cfs.h_nr_running checks, and this lead me to stare intently at the active load balancer. I haven't seen it happen (yet), but from reading the code it really looks like we can have some scenarios where