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Date: Mon, 21 Jul 2003 14:23:53 -0300 (BRT)
From: Marcelo Tosatti <marcelo@conectiva.com.br>
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To: Stephan von Krawczynski <skraw@ithnet.com>
Cc: mason@suse.com, andrea@suse.de, riel@redhat.com,
       linux-kernel@vger.kernel.org, maillist@jg555.com
Subject: Re: Bug Report: 2.4.22-pre5: BUG in page_alloc (fwd)
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On Mon, 21 Jul 2003, Stephan von Krawczynski wrote:

> On Mon, 21 Jul 2003 10:49:06 +0200
> Stephan von Krawczynski <skraw@ithnet.com> wrote:
>
> > On Fri, 18 Jul 2003 11:14:15 -0300 (BRT)
> > Marcelo Tosatti <marcelo@conectiva.com.br> wrote:
> >
> > >
> > > I have just started stress testing a 8way OSDL box to see if I can
> > > reproduce the problem. I'm using pre6+axboes BH_Sync patch.
> > >
> > > I'm running 50 dbench clients on aic7xxx (ext2) and 50 dbench clients on
> > > DAC960 (ext3). Lets see what happens.
> > >
> > > After lunch I'll keep looking at the oopses. During the morning I only had
> > > time to setup the OSDL box and start the tests.
> >
> > Hello Marcelo,
> >
> > have you seen anything in your tests? My box just froze again after 3 days
> > during NFS action. This was with pre6, I am switching over to pre7.
>
> I managed to freeze the pre7 box within these few hours. There was no nfs
> involved, only tar-to-tape.

You had NMI on, correct? Sysrq doesnt work, correct?

> I switched back to 2.4.21 to see if it is still stable. Is there a
> possibility that the i/o-scheduler has another flaw somewhere (just like
> during mount previously) ...

It might be a problem in the IO scheduler, yes.

Lets isolate the problems: If 2.4.21 doenst lockup, try 2.4.22-pre7
without drivers/block/ll_rw_blk{.c,.h} changes.