Re: WARNING: kernel/sched/cputime.c:481 at kcpustat_dyntick_stop+0x8b/0xa0, CPU#0: swapper/0/0 (was: [PATCH v3] sched/cputime: Don't account idle time twice after dyntick-idle)

[Stian Halseth]

Hi Paul,

On Sun, 2026-10-25 at 08:27 +0100, Paul Menzel wrote:
> 
> On a Dell XPS 13 9360 (Intel Kaby Lake, 4 CPUs), Linus’ master from
> the 7.4 merge window, warned once during boot (of five boots having
> your change included), in the first idle period of CPU 0:

Thanks for the report. I believe the warning _is_ the bug here, and
that the accounting itself is correct.

Currently running tests on a follow up patch, suggesting to remove
WARN_ON_ONCE, with a comment explaining why.

Once tests are done, I'll finish writing up the commit message which
explains my reasoning in detail. Should follow shortly.

/Stian

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