Weird Linux - FreeBSD/ZFS NFSv4 interoperability problem

[Julian Elischer]

On 9/3/10 9:08 AM, David Brodbeck wrote:
> (Note: I originally posted this to freebsd-questions, and it was
> suggested I take it here.)
>
> While doing some interoperability testing between Linux and FreeBSD, I
> came up with this unusual issue.  I could use some help figuring out
> if this is a bug, and if so, where to file it.  Here's the scenario:
>
> - FreeBSD 8.1-RELEASE server, sharing a ZFS filesystem via NFSv4.

to help change and test things
try using ZFS V28 with the virtualbox virtual machine that pjd 
announced yesterday.

--Quote--
Here you can find VirtualBox Appliance (113MB) with
FreeBSD 9-CURRENT and ZFSv28:

	http://people.freebsd.org/~pjd/misc/FreeBSD9_ZFSv28_0.1.tgz

Untar it, import it (zfsv28.ovf) to VirtualBox and have fun.
----
In fact having a virtualbox 9.0 machine may help solve things anyhow 
as 9.0 has new nfs code too.


> - Linux client (I've tested with RHEL 5.4 and Debian Lenny) mounting
> said filesystem with NFSv4.
> - A user on the Linux client does a Subversion checkout onto the
> mounted filesystem.
>
> At the end of the checkout, access to the filesystem hangs.  nfsd on
> the FreeBSD server and rpciod on the Linux client seem to be in a
> tight loop, and there's lots of network traffic between them.  I can
> reproduce this every time.
>
> The problem does not occur if the backing filesystem is UFS instead of
> ZFS, if NFSv3 is used instead of NFSv4, or if the client is FreeBSD
> instead of Linux.
> _______________________________________________
> freebsd-fs at freebsd.org mailing list
> http://lists.freebsd.org/mailman/listinfo/freebsd-fs
> To unsubscribe, send any mail to "freebsd-fs-unsubscribe at freebsd.org"