Re: [PATCH] workqueue: fix selection of wake_cpu in kick_pool()

[Sven Schnelle]

Tejun Heo <tj@xxxxxxxxxx> writes:

> Hello,
>
> On Wed, Apr 17, 2024 at 05:36:38PM +0200, Sven Schnelle wrote:
>> > This generally seems like a good idea but isn't this still racy? The CPU may
>> > go down between setting p->wake_cpu and wake_up_process().
>> 
>> Don't know without reading the source, but how does this code normally
>> protect against that?
>
> Probably by wrapping determining the wake_cpu and the wake_up inside
> cpu_read_lock() section.

Thanks. Should i send a v2 and incorporate your additional changes or do
you want to do that?