Re: [patch 5/5] clocksource: Rewrite watchdog code completely

[Jiri Wiesner]

On Sun, Mar 08, 2026 at 11:05:31AM +0100, Thomas Gleixner wrote:
> On Wed, Feb 25 2026 at 19:13, Jiri Wiesner wrote:
> > On Sat, Jan 24, 2026 at 12:18:01AM +0100, Thomas Gleixner wrote:
> >> To address this and bring back sanity to the watchdog, rewrite the code
> >> completely with a different approach:
> >> 
> >>   1) Restrict the validation against a reference clocksource to the boot
> >>      CPU, which is usually the CPU/Socket closest to the legacy block which
> >>      contains the reference source (HPET/ACPI-PM timer).
> >
> > The UEFI picks the boot CPU so the kernel does not have control over
> > that. On the other hand, I think the CPU that is connected to the
> > southbridge chip (by DMI or PCIe) will be selected in the majority of
> > UEFI implementations.
> 
> Picking a remote node CPU would be insane, but yes BIOSes are insane by
> definition.

Yes, I was mostly just being paranoid. Please include:
Reviewed-by: Jiri Wiesner <jwiesner@xxxxxxx>
in the next version of the patchset.
-- 
Jiri Wiesner
SUSE Labs