Le Wed, Apr 02, 2025 at 06:53:24AM +, Kuyo Chang (張建文) a écrit :
> Hi,
>
> By review the get_nohz_timer_target(), it's probably making an offline
> CPU visible at timer candidates, maybe this patch could fix it?
>
>
> [PATCH] sched/core: Exclude offline CPUs from the timer candidates
>
> Th
On Wed, 2025-03-26 at 17:44 +0100, Frederic Weisbecker wrote:
> Hi Walter Chang,
>
> Le Wed, Mar 26, 2025 at 05:46:38AM +, Walter Chang (張維哲) a écrit
> :
> > On Tue, 2025-01-21 at 09:08 -0800, Paul E. McKenney wrote:
> > > On Sat, Jan 18, 2025 at 12:24:33AM +0100, Frederic Weisbecker
> > > wro
On Wed, 2025-03-26 at 17:44 +0100, Frederic Weisbecker wrote:
>
> It's not the first time I get such a report on an out of tree
> kernel. The problem is I don't know if the tainted modules are
> involved. But something is probably making an offline CPU visible
> within
> the hierarchy on get_nohz_
Hi Walter Chang,
Le Wed, Mar 26, 2025 at 05:46:38AM +, Walter Chang (張維哲) a écrit :
> On Tue, 2025-01-21 at 09:08 -0800, Paul E. McKenney wrote:
> > On Sat, Jan 18, 2025 at 12:24:33AM +0100, Frederic Weisbecker wrote:
> > > hrtimers are migrated away from the dying CPU to any online target
> >
On Tue, 2025-01-21 at 09:08 -0800, Paul E. McKenney wrote:
> On Sat, Jan 18, 2025 at 12:24:33AM +0100, Frederic Weisbecker wrote:
> > hrtimers are migrated away from the dying CPU to any online target
> > at
> > the CPUHP_AP_HRTIMERS_DYING stage in order not to delay bandwidth
> > timers
> > handli
On Sat, Jan 18, 2025 at 12:24:33AM +0100, Frederic Weisbecker wrote:
> hrtimers are migrated away from the dying CPU to any online target at
> the CPUHP_AP_HRTIMERS_DYING stage in order not to delay bandwidth timers
> handling tasks involved in the CPU hotplug forward progress.
>
> However wake up
hrtimers are migrated away from the dying CPU to any online target at
the CPUHP_AP_HRTIMERS_DYING stage in order not to delay bandwidth timers
handling tasks involved in the CPU hotplug forward progress.
However wake ups can still be performed by the outgoing CPU after
CPUHP_AP_HRTIMERS_DYING. Tho
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