2.6 NFS stale filehandle with subtree_check

Hello all,

I have a NFS fileserver (currently based on XFS on 3ware RAID),
which I have tried to upgrade to 2.6. kernel. After reboot, clients started to see partial directories, or cannot open/create files in their cwd, with the "stale NFS file handle" message. Using no_subtree_check option in /etc/exports helped, as well as going back to 2.4+XFS.

It is probably not XFS related, because I had the same problem
on an older HW of this server (which had an ext3 volumes on software RAID) and some 2.6.0-pre kernel. At that time I did not know that I had to try no_subtree_check, so I don't know whether this would have fixed the problem on the older HW. I went back to 2.4 then.

The machine serves the home directories via NFS and Samba.
I have home directories for ~2200 users there, each one with its own /etc/exports entry[1]. NFS clients are various Linux, Solaris and IRIX workstations and servers.

Is it possible to use subtree_check in NFS in 2.6? Thanks,

-Yenya

[1] For another unrelated user-space problem with such a big /etc/exports, see http://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=76643

| Jan "Yenya" Kasprzak  <kas at {fi.muni.cz - work | yenya.net - private}> |
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| http://www.fi.muni.cz/~kas/   Czech Linux Homepage: http://www.linux.cz/ |
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