Re: [BUG,2.6.29-rc7,s390] System goes into endless loop during boot or logon

Frans Pop
2009-03-09T09:26:13Z

On Monday 09 March 2009, you wrote:
> On Mon, 2009-03-09 at 02:53 +0100, Frans Pop wrote:
> > Follow-up to an issue reported on the linux-s390 list, seen in the
> > Hercules S/390 emulator.
> >
> > On Sunday 08 March 2009, Frans Pop wrote:
> > > Well, not quite. It does boot successfully and I do get a login
> > > prompt. I can also login on the console or connect with SSH, but in
> > > both cases the system again gets into some loop before I actually
> > > get a shell prompt.
> >
> > During the bisection series the system would sometimes enter the loop
> > during the boot procedure, before I tried to logon. After it enters
> > the loop one processor just goes racing at 100%.
>
> Where? Do you have NMI watchdog output, or even sysrq-t?

I'm afraid I have no idea.

AFAICT s390 does not have an NMI watchdog. And I have no idea how I could
trigger a sysrq given that I can't login and only have a dumb console or
SSH session to work with anyway.

Maybe the people on the linux-s390 list have some suggestions, or even the
Hercules developers?