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Scheduler fix:

Browse Source 
- Fix a false positive cputime related warning in kcpustat_dyntick_stop()
    that can trigger sporadically after a clocksource switch (Stian Halseth)
 
 Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'sched-urgent-2026-11-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull scheduler fix from Ingo Molnar:

 - Fix a false positive cputime related warning in kcpustat_dyntick_stop()
   that can trigger sporadically after a clocksource switch (Stian Halseth)

* tag 'sched-urgent-2026-11-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  sched/cputime: Don't warn when the tick period starts after idle exit
This commit is contained in:
Linus Torvalds 2026-11-01 09:52:32 -08:00
commit 46fec1c302
1 changed files with 6 additions and 1 deletions
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7
kernel/sched/cputime.c
View File

@ -478,7 +478,12 @@ void kcpustat_dyntick_stop(u64 now, u64 tick_start)
kc->idle_tick_overlap = 0;
}
tick_start = max(tick_start, kc->idle_dyntick_entry);
if (!WARN_ON_ONCE(now < tick_start))
/*
* After a switch from the jiffies clocksource the tick can be
* armed more than a tick ahead, so the period may not have
* started yet.
*/
if (now > tick_start)
kc->idle_tick_overlap += now - tick_start;
kcpustat_idle_stop(kc, now);
kc->idle_dyntick = false;