Messages in this thread | | | From | Odin Ugedal <> | Date | Wed, 23 Jun 2021 17:13:11 +0200 | Subject | Re: [powerpc][next-20210621] WARNING at kernel/sched/fair.c:3277 during boot |
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ons. 23. jun. 2021 kl. 15:56 skrev Vincent Guittot <vincent.guittot@linaro.org>: > > > The pelt value of sched_entity is synced with cfs and its contrib > before being removed.
Hmm. Not sure what you mean by sched_entity here, since this is only taking the "removed" load_avg and removing it from cfs_rq, together with (removed.load_avg * divider) from load_sum. (Although. ".removed" comes from a sched entity)
> Then, we start to remove this load in update_cfs_rq_load_avg() before > calling __update_load_avg_cfs_rq so contrib should not have change and > we should be safe
For what it is worth, I am now able to reproduce it (maybe CONFIG_HZ=300/250 is the thing) as reported by Sachin, and my patch makes it disappear. Without my patch I see situations where _sum is zero while _avg is eg. 1 or 2 or 14 (in that range). This happens for both load, runnable and util.
Lets see what Sachin reports back.
Thanks Odin
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