Samba-3.0.23c kernel lock problems with new Redhat kernel 2.6.9-42.0.8

[Don Meyer <dlmeyer (at) uiuc.edu>]

Olm,

What are the details (OS/type, etc.) of the NFS server that you are 
mounting these resources from?   Is it possible that you are mounting 
an older 32 bit NFS service from a system that is evidently 64 bit capable?

-D

At 09:45 AM 2/2/2007, Ole Holm Nielsen wrote:
> We run samba-3.0.23c on some Redhat RHEL4 servers, and Samba used to work
> like a charm.  But then a couple of days ago we upgraded the kernel
> on the Samba servers to kernel-smp-2.6.9-42.0.8.EL.  All of a sudden
> our Windows users could not use Microsoft Office with files on the
> Samba shares :-(
>
> Our filesystems are actually NFS-mounted by the Samba server from
> another server, and the Samba server showed these log entries:
>
> ...
>
> With the previous kernel kernel-smp-2.6.9-42.0.3.EL there were no
> such problems !  The Redhat kernel Release Notes
>    https://rhn.redhat.com/errata/RHSA-2007-0014.html
> do not mention any changes that seem to be related to Samba or NFS or locking.
>
> Fortunately I found this article
>    http://lists.samba.org/archive/samba/2006-October/126638.html
> where Jeremy recommends to use "posix locking = no", and indeed
> this fixes the problem !
>
> Hopefully these observations can help others, but a real solution
> to the problem would be most welcome !
>
> --
> Ole Holm Nielsen
> Department of Physics, Technical University of Denmark

Don Meyer                                           <dlmeyer (at) uiuc.edu>
Network Manager, ACES Academic Computing Facility
Technical System Manager, ACES TeleNet System
UIUC College of ACES, Information Technology and Communication Services

  "They that can give up essential liberty to obtain a little 
temporary safety,
        deserve neither liberty or safety."     -- Benjamin Franklin, 1759 

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