Re: [Re] kernel panic during shutdown in next-20260722

[Bert Karwatzki]

Am Donnerstag, dem 23.07.2026 um 18:17 +0200 schrieb 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
> 
> 
> 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 ...) 
> 
Actually this is not cause by netconsole, but by rebooting right after a crash. Some
broken state seems to be preserved across reboots. Switching off the power supply after
a crash or even a ~30s wait after switching off the crashed machine seems to be enough
to get around this.
 Also the hang when rebooting next-20260722 also occurs when compiling without PREEMPT_RT.

Bert Karwatzki