Re: NFSv4 poops itself

Trond Myklebust
2007-07-27T17:10:03Z

On Fri, 2007-07-27 at 09:33 -0400, Trond Myklebust wrote:
> On Fri, 2007-07-27 at 08:53 -0400, Jeff Garzik wrote:
> > Background:
> >
> > Server: x86-64 dual core Intel, kernel 2.6.23-rc1 (my home fileserver)
> > Exporting NFS/NFSv4 mounts. Client count: 1 Uptime: 4 days
> >
> > Client: x86-64 dual core Intel, kernel 2.6.23-rc1 (my main workstation)
> > NFS mount setup:
> > pretzel:/ on /g type nfs4 (rw,noatime,proto=tcp,addr=10.10.10.1)
> > Uptime: 4 days
> >
> > Home directory mounted via NFSv4.
> >
> > Problem:
> >
> > My workstation has been happily talking to my file server for several
> > days without incident. An hour ago, my numeric keypad stopping working
> > (unrelated problem... USB or X bug?). The solution to the keypad
> > problem is usually to log out of X and log back in, or worse case, reboot.
> >
> > So, I log out, and log back in. At first, a few shell windows open and
> > successfully initialize themselves (read bash profile over NFS, etc.)
> > Then, as more shell windows open, things start hanging. I can easily
> > switch to console and ssh to the fileserver, so it is clear this is an
> > NFS hang.
> >
> > No adverse messages at all on the client.
> >
> > On the server, I see NFSv4 spamming dmesg with hundreds of thousands of
> > messages:
> >
> > Jul 27 08:20:53 pretzel kernel: NFSD: preprocess_seqid_op: old stateid!
> > Jul 27 08:21:24 pretzel last message repeated 167966 times
> > Jul 27 08:21:55 pretzel last message repeated 173628 times
> > Jul 27 08:21:55 pretzel kernel: NFSD: preprocess_seqid_op: old stateid!
> > Jul 27 08:22:26 pretzel last message repeated 171286 times
> > Jul 27 08:23:27 pretzel last message repeated 344461 times
> > Jul 27 08:23:30 pretzel last message repeated 18656 times

Jeff and Bruce, could you please try to reproduce the problem after
either applying patches 001 to 004 or just the single NFS_ALL patch
from

http://client.linux-nfs.org/Linux-2.6.x/2.6.23-rc1/

Cheers
Trond