Kernel Panic on Backup

[J. Bruce Fields]

On Sat, Mar 29, 2008 at 10:25:35AM -0400, Norman Elton wrote:
> Hello,
> 
> We've begun rolling out NFSv4 for our servers. We mainly use it to  
> mount home directories for the sysadmins who SSH into the box, as well  
> as for a shared "scratch" space. We're not really pushing tons of data  
> here.
> 
> I have a cron job that backs up relevant directories to the NFS mount  
> nightly using rsync:
> 
> rsync -rlptD --stats --exclude-from=/etc/backup.conf --exclude='*' / / 
> nfs/backup/$HOSTNAME
> 
> Everything was working fine for the past few weeks, until I recently  
> rebuilt four servers to use NFSv4.

Just to be clear--these servers are nfsv4 *clients*, right?

> Three of these have locked up so  
> far, two of which died about the time of the nightly backup. I was  
> able to get a picture of the kernel panic on the third server:

Thanks for the picture!  If there were some way to just get a couple
more lines above the top of the screen, that'd have a few more
details....

> 
> http://wnelto.people.wm.edu/crash.jpg
> 
> The panic seems to have some scary GSS / NFS messages in there, but  
> I'm unsure what to do next.

Yes, so the top of the stack is:

	auth_rpcgss:gss_setup_upcall+0x91/0xf3
	auth_rpgss:gss_refresh+0x7c/0x12d

and then nfs4_proc_setclientid is in there too.

What kernel version is this?

--b.

> 
> Any ideas?
> 
> Thanks,
> 
> Norman Elton
> College of William & Mary
> Williamsburg VA
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