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Re: NFS server problems (lockup) on netbsd-5

On Wed, Apr 27, 2011 at 10:49:02AM +0200, Christoph Egger wrote:
> On 04/26/11 18:31, Manuel Bouyer wrote:
> >Hello,
> >I tried upgrading a NFS server to today's netbsd-5 branch, without success.
> >The previous kernel (netbsd-5 from 7 feb 2010) is rock solid.
> >I tried a kernel from before the recent nfs-related pullups, it shows
> >the same symptoms.
> >
> >After a few hours of operation, the network stack is locked up.
> >The server doesn't reply to ping, but the console is still alive and
> >I can log in (it doesn't always make it to the shell though).
> >ps from ddb shows lots of processes waiting on tstile, the lock seems to
> >be the softnet_lock. One of the nfsd thread is waiting on livelock, I suspect
> >it's also trying to get the softnet_lock but with a tryenter/kpause.
> >
> >unfortunably I don't have a core dump (I couldn't get one).
> >
> >Any idea about what could be going on ?
> Is this PR 42455 ?

it's not, this PR is about a NFS client hang; in my case it's the
server which hangs.

Manuel Bouyer <>
     NetBSD: 26 ans d'experience feront toujours la difference

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