[Crash-utility] problems running crash on recent rawhide live kernels

[Jeff Layton]

On Mon, 03 Dec 2007 15:19:41 -0500
Dave Anderson <anderson at redhat.com> wrote:

> Jeff Layton wrote:
> > I was trying to run crash against a live rawhide kernel and am
> > getting some errors when I try to start it:
> > 
> >     crash: invalid task address in pid_hash: ccccccccccccca84
> >     crash: invalid task address in pid_hash: ccccccccccccca84
> >     ...
> >     crash: invalid task address in pid_hash: ccccccccccccca84
> > 
> >     crash: cannot gather a stable task list via pid_hash (500
> > retries)
> > 
> > ...and then crash exits. There are a few messages in dmesg:
> > 
> >     crash memory driver: version 1.0
> >     crash memory driver: !page_is_ram(pfn: 61000000c)
> > 
> > Relevant packages:
> > 
> >     kernel-2.6.24-0.62.rc3.git5.fc9.x86_64
> >     kernel-debuginfo-2.6.24-0.62.rc3.git5.fc9.x86_64
> >     crash-4.0-4.10.x86_64
> > 
> > ... the host is a FV xen guest (but that shouldn't matter, should
> > it?).
> > 
> > I'm hoping I'm just doing something wrong, but I don't see anything
> > right offhand.
> > 
> 
> Hard to do anything wrong, i.e., you just have to enter "crash".
> 
> With a kernel that new, it certainly could be shifting sands syndrome.
> 
> It did get quite a long way before failing.  I wonder if something's
> changed upstream associated with the pid_hash code?  Can you verify
> that the tt->refresh_hash_table gets set to
> refresh_hlist_task_table_v2()?
> 

Ahh, I think a bunch of the new pid namespace stuff was merged
recently. That might be the culprit.

> If the system is accessible to me (reply offline), I'll be happy to
> take a look.
> 

Will do, thanks!

-- 
Jeff Layton <jlayton at redhat.com>