NFS hangs (was: Re: FBSD-7.0 status...)

[Pawel Jakub Dawidek]

On Thu, Aug 16, 2007 at 11:59:51PM +0200, Dag-Erling Sm??rgrav wrote:
> [continuing a thread from another list about client-side NFS issues with
> recent kernels]
> 
> Fresh 7.0-CURRENT-200706-i386 install; no rc.conf, no configuration
> other than listing the root fs in /etc/fstab and symlinking /boot/kernel
> to /boot/GENERIC; PXE / NFS unattended boot to multiuser hangs while
> writing /var/run/dmesg.boot.  The file remains empty on the NFS server.
> Complete tcpdump (from power-on to reset) attached.  10.0.0.4 is the
> server ("ds4"), 10.0.0.10 is the client ("xps").
> 
> This really surprises me, as my web server is running fine with a
> 2007-07-03 kernel (but fails with a 2007-07-29 kernel) as an NFS client
> against the same server.
> 
> Starting to think it might be a server issue after all.  The server runs
> CURRENT from 2007-08-03.  All exported file systems are ZFS; should I
> try to disable the ZIL?  That's the one part of ZFS I can think of that
> would interact with NFS in a way other file systems don't.

I can't see how ZIL can make any difference visible for NFS clients,
except when your NFS server crashes. Although I'd keep ZFS on suspects
list, as exporting ZFS file systems over NFS wasn't really heavily
tested.

-- 
Pawel Jakub Dawidek                       http://www.wheel.pl
pjd at FreeBSD.org                           http://www.FreeBSD.org
FreeBSD committer                         Am I Evil? Yes, I Am!
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