impossible packet length ...

[Danny Braniss]

> On 2009-Feb-06 08:32:27 +0200, Danny Braniss <danny at cs.huji.ac.il> wrote:
> >on 2 different servers, running 7.1-stable + zfs, I get this
> >error rather frequently:
> >
> >Feb  5 17:01:03 warhol-00 kernel: impossible packet length (543383918) fro=
> m=20
> >nfs server sunfire:/dist
> 
So many quetsions :-)

> I gather warhol-00 is running 7.1-S+ZFS.
> How recent a 'stable' is it?
very:
	FreeBSD warhol-00 7.1-STABLE FreeBSD 7.1-STABLE #37: Fri Jan 23 10:41:54 IST 
2009
and its amd64.

> Where does ZFS fit in?  Is sunfire:/dist mountpoint in a local ZFS or
> is a local ZFS mountpoint inside the sunfire:/dist mount?
warhole is a nfs server, the storage is a ZFS local raid, the errors
occure on a nfs/tcp mounted file system on warhol.

> Do you get the same problems without any ZFS mounts?
I have several hosts running 7.1-stable without nfs exported ZFS, non have 
this error
That is why I think there is a connection, because on two, which have ZFS 
exported
the problem appears.

> Is this a TCP or UDP NFS mount?  What happens if you switch protocols?
i'll try but not trivial.
the other difference between the boxes is that one is dataless, while
the other is stand-alone (well, / is on a local disk, but /usr/local &
home dirs are on the network/nfs).

> What NIC are you using and are you seeing any network errors?
bce, the boxes are Dell-2950, but no visible errors.

> Are you able to capture a protocol trace showing the transaction including
> erroneous packet?
I have started the capture, but since I don't know what triggers the problem,
it will take some time. I will also start capturing packets at the router 
level,
but that will have to wait till next week.

thanks,
	danny

> 
> --=20
> Peter Jeremy
> 
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