Re: 2.6.8-rc2 crashes

[viro@parcelfarce.linux.theplanet.co.uk]

On Tue, Jul 27, 2004 at 01:15:22PM -0400, Gene Heskett wrote:
> On Tuesday 27 July 2004 10:29, viro@parcelfarce.linux.theplanet.co.uk wrote:
> >On Tue, Jul 27, 2004 at 12:33:04PM -0400, Gene Heskett wrote:
> >> Greetings everybody;
> >>
> >> I have now had 4 crashes while running 2.6.8-rc2, the last one
> >> requiring a full powerdown before the intel-8x0 could
> >> re-establish control over the sound.
> >>
> >> All have had an initial Opps located in prune_dcache, and were
> >> logged as follows:
> >> Jul 27 07:58:58 coyote kernel: Unable to handle kernel NULL
> >> pointer dereference at virtual address 00000000
> >
> >... which means that dentry_unused list got corrupted, which doesn't
> > really help.  Could you try to narrow it down to 2.6.8-rc1-bk<day>?
> 
> I got the bright idea of doing some cmp's on that code module, and 
> its identical all the way back to 2.6.7-mm1, (I have them all) but 
> differs at 2.6.7:

Doesn't help - all we know is that at some point in a cyclic list we'd
got NULL instead of a pointer to the next list element.  Could've happened
for any number of reasons.

What filesystems do you have on that box, BTW?