Messages in this thread | | | Subject | Re: WARNING: CPU: 0 PID: 12 at kernel/sched/fair.c:3306 update_blocked_averages+0x941/0x9a0 | From | Dietmar Eggemann <> | Date | Mon, 2 Aug 2021 10:42:18 +0200 |
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Hi Ammar,
On 30/07/2021 17:21, Ammar Faizi wrote: > Hi everyone, > > I compiled Linux 5.13.0 and use it on my Ubuntu. I got a kernel warning > at kernel/sched/fair.c:3306. > > Below is the system information > Kernel: 5.13.0-icetea001-12377-gf55966571d5e
So you're running with:
9e077b52d86a - sched/pelt: Check that *_avg are null when *_sum are (2021-06-17 Vincent Guittot)
but not with:
ceb6ba45dc80 - sched/fair: Sync load_sum with load_avg after dequeue (2021-07-02 Vincent Guittot)
The SCHED_WARN_ON you're hitting is harmless and just tells you that the PELT load_avg and load_sum part of one of your cfs_rq's is not aligned. Has to be load (and not util or runnable) since load is the only one still not fixed in f55966571d5e.
This should go away once you applied ceb6ba45dc80.
-- Dietmar
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