Re: [Re] kernel panic during shutdown in v7.2-rc{3,4} and next-20260722 with PREEMPT_RT

[Bert Karwatzki]

Am Donnerstag, dem 23.07.2026 um 15:23 +0200 schrieb Bert Karwatzki:
> Am Donnerstag, dem 23.07.2026 um 15:10 +0200 schrieb Bert Karwatzki:
> > I was able to gather the panic error message from a failed shutdown via netconsole,
> > this time the kernel used was v7.2-rc3:
> > #
> > Bert Karwatzki
> 
> Unfortunatetly I can now reproduce these kernel panics in v7.1:
> 
> 
> So now I'm going to use memtest86+ on my machine and then look at the changes I had in
> my userspace as the first error occured on 22.7.2026. Let's hope this does not escalate ...
> 
> Bert Karwatzki

So I've run memtest86+ for ~2.5h (2.6 complete runs) and found no error. Even if my memory
contained an error, if it's that hard to trigger it would not cause frequent crashes.

But I found out an exciting thing:
I can only reproduce the crashes in v7.2-rc4 when watching the reboot via netconsole,
without netconsole no crash occurs!(This also explains why I had not seen this crashes before ...) 
In next-20260722 the crash is reproducible without netconsole.
So I'm going back to bisecting from v7.2-rc4 to next-20260722. Once I'm finished with
that I'm going to look at the "netconsole triggerred" crashes.
 Does anyone have an idea what's going on?

Bert Karwatzki