Re: [PATCH] MIPS: smp: report dying CPU to RCU in stop_this_cpu()

[Jonas Jelonek]

Hi,

On 05.06.26 12:34, Sebastian Andrzej Siewior wrote:
> Does 
> 	echo 0 > /sys/devices/system/cpu/cpu1/online
>
> lead to the same problem?

Funny, my device doesn't have this 'online' file, neither for the
other CPUs. So it seems this CPU hotplug isn't supported/used here?
Or am I missing a Kconfig option for that?

I'm working on a Realtek RTL931x SoC here, it has MIPS interAptiv
cores. I can provide more information if needed.

> I missed that arm64 has also this but only if the online path fails kind
> of early, see
> 	04e613ded8c26 ("arm64: smp: Tell RCU about CPUs that fail to come online")
>
> so this not the "normal" case but an exception. Mips seems to be doing
> something different here. I am not sure if this is the only thing that
> is missing.
>
>> Best,
>> Jonas
> Sebastian

Best,
Jonas