Re: [PATCH 0/4 V3] Print traces on softlockup

From: Don Zickus
Date: Wed Apr 23 2014 - 15:22:40 EST


On Tue, Apr 22, 2014 at 11:28:28AM -0700, Andrew Morton wrote:
> On Tue, 22 Apr 2014 11:17:24 -0400 Don Zickus <dzickus@xxxxxxxxxx> wrote:
>
> > Added more patches to handle the 'uniprocessor' panic case by sending NMIs
> > to every cpu but self. Only affects x86, sparc.
> >
>
> Looks OK to me. A couple of things:
>
> - Patches 1-3 should be combined so we don't create bisection holes
> due to x86 and sparc build errors.
>
> - Patch 4 adds stuff which is unusable on uniprocessor, especially
> the presence of /proc/sys/kernel/softlockup_all_cpu_backtrace. We
> already have #ifdef CONFIG_SMP in kern_table, so do more of that?

Are you suggesting just add CONFIG_SMP to kern_table entry or all the
pieces in kernel/watchdog.c too? I wasn't sure how messy I should make
this patch.

Cheers,
Don
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/