Re: 2.6.19-rc6 : Spontaneous reboots, stack overflows - seems to implicate xfs, scsi, networking, SMP

Arjan van de Ven
2006-11-24T07:52:47Z

On Fri, 2006-11-24 at 11:55 +1100, David Chinner wrote:
> On Thu, Nov 23, 2006 at 07:37:00PM +0100, Arjan van de Ven wrote:
> > On Thu, 2006-11-23 at 14:16 +0100, Ingo Oeser wrote:
> > > Hi there,
> > >
> > > David Chinner schrieb:
> > > > If the softirqs were run on a different stack, then a lot of these
> >
> > softirqs DO run on their own stack!
>
> So they run on a separate stack for 4k stacks on x86?
>
> They don't run on a separate stack for 8k stacks on x86 -
> Jesper's traces show that - so this may indicate an issue
> with the methodology used to generate the stack overflow
> traces inteh first place. i.e. if 4k stacks use a separate
> stack, then most of the reported overflows are spurious
> and would not normally occur on 4k stack systems..
>
> Can you confirm this, Arjan?

yes there are separate stacks for softirq and hardirq context with 4K
stacks, but not for 8K stacks.

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