Re: [PATCH V2] x86/mce: Serialize sysfs controls against CPU hotplug

[Thomas Gleixner]

On Thu, Oct 29 2026 at 12:56, Yazen Ghannam wrote:
> On Wed, Oct 28, 2026 at 08:45:07PM +0100, Thomas Gleixner wrote:
> These were able to hit the new Sashiko findings.
>
> There are two separate ones.
> 1) Another deadlock.
> 2) PREEMPT_RT warning.

Grrr.

> The diff below fixes both. Though I'm not sure the if the msleep() is
> okay.

Not really.

I think I know how to fix it for real now that I understood the nasty
interaction with kernfs, but I won't come around to look into it before
Monday.