Re: [PATCH v2 1/1] hung_task: fix warnings caused by unaligned lock pointers

[David Laight]

On Thu, 9 Oct 2025 09:11:06 +0200
Geert Uytterhoeven <geert@xxxxxxxxxxxxxx> wrote:

> Hi Andrew,
> 
> On Thu, 9 Oct 2025 at 06:04, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> wrote:
> > On Thu, 9 Oct 2025 10:01:18 +0800 Lance Yang <lance.yang@xxxxxxxxx> wrote:  
> > > I think we fundamentally disagree on whether this fix for known
> > > false-positive warnings is needed for -stable.  
> >
> > Having the kernel send scary warnings to our users is really bad
> > behavior.  And if we don't fix it, people will keep reporting it.  
> 
> As the issue is present in v6.16 and v6.17, I think that warrants -stable.
> 
> > And removing a WARN_ON is a perfectly good way of fixing it.  The
> > kernel has 19,000 WARNs, probably seven of which are useful :(  
> 
> Right. And there is panic_on_warn...

Which, like panic_on_oops, panics before syslogd has a chance to write
the error message to /var/log/kernel.
Both are set in some environments.

Tracking down those crashes is a right PITA.

	David

> 
> Gr{oetje,eeting}s,
> 
>                         Geert
> 
> --
> Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
> 
> In personal conversations with technical people, I call myself a hacker. But
> when I'm talking to journalists I just say "programmer" or something like that.
>                                 -- Linus Torvalds
>