Re: NFS mount warnings on EWS-4

[Stephen Gardner <stephen-rhel uk org>]

On Thu, 24 Mar 2005, Freddy Jensen wrote:

> After I upgraded from Redhat EWS-3 to Redhat EWS-4
> I started getting these problems:
>
> nfs warning: mount version older than kernel
> nfs warning: mount version older than kernel
> nfs warning: mount version older than kernel
> nfs warning: mount version older than kernel
>
> Does anyone know how to fix this problem?
>
> Could it be because we use amd as the
> automounter rather that autofs?

Freddy,
        Here's a reference to an NFS mailing list where someone else had a 
similar problem.

http://sourceforge.net/mailarchive/forum.php?thread_id=6824289&forum_id=4930

It appears to be an interaction problem between  amd  and the kernel and 
the lack of NFSv4 support in  amd  in particular.

> From the looks of that message Trond Myklebust (the kernel NFS client 
maintainer) has signed off a change to the relevant part of the NFS code 
in the v2.6.11 kernel to fix this.

There's a Fedora Core bugzilla report for the same thing from September 2004
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=133708
It might be worth adding a bit more to that report as its assigned to 
am-utils and it looks like a kernel level issue. I've included the patch 
summary at the bottom.

To summarise there's a kernel source code level fix forthcoming but it'll 
take some time to filter down to RHEL4. Hopefully someone will know a way 
to actually suppress the message.

Regards,
        Stephen

---

> From  Trond Myklebust's  kernel v2.6.11 patch summary with the specifics

 NFS: Kill annoying mount version mismatch printks

  Ensure that we fix up the missing fields in the nfs_mount_data with
  sane defaults for older versions of mount, and return errors in the
  cases where we cannot.

  Convert a bunch of annoying warnings into dprintks()

  Return -EPROTONOSUPPORT rather than EIO if mount() tries to set NFSv3
  without it actually being compiled in.