NFS deadlock (unkillable nfsd and no mounts work)

Richard A Steenbergen ras at
Fri Nov 5 22:33:36 UTC 2010

On Thu, Nov 04, 2010 at 10:35:15PM -0700, Josh Carroll wrote:
> Greetings!
> I'm having a problem with nfsd hanging and not serving mount points,
> during which time it can not not be killed. This problem started
> happening sometime after November 2nd, since kernel from 11/2 sources
> does not exhibit this problem.

I had a similar issue on -current a few weeks ago, with processes that 
would lock up and become unkillable when they tried to access certain 
parts of the filesystem (running all zfs here). One time it managed to 
lock up every time you'd do an ls /, but a reboot would always clear it, 
then a few days later it would pop up again somewhere else. I never lost 
any data, zfs never found anything wrong, and the drives and hw all 
checked out. I sync'd up with the latest -current on oct 18th and it 
stopped happening (or maybe I just stopped noticing it, entirely 
possible for a very lightly used personal box), plus I was traveling and 
super busy at the time, so I didn't bother pursuing it further.

Richard A Steenbergen <ras at>
GPG Key ID: 0xF8B12CBC (7535 7F59 8204 ED1F CC1C 53AF 4C41 5ECA F8B1 2CBC)

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