intermittent EPERM

intermittent EPERM

[Brian J. Murrell]

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Since having upgraded my Ubuntu (edgy) kernel I have noticed the last
few revs of it cause intermittent EPERM errors on NFS clients.  For
example:

brian@pc:~$ sudo mount pc:/home/brian /mnt/test
brian@pc:~$ cd /mnt/test
brian@pc:/mnt/test$ cat .bash_profile
cat: .bash_profile: Permission denied
brian@pc:/mnt/test$ cat .bash_profile
cat: .bash_profile: Permission denied
brian@pc:/mnt/test$ cat .bash_profile
# .bash_profile

# Get the aliases and functions
if [ -f ~/.bashrc ]; then
        . ~/.bashrc
fi

It took three attempts at reading that file to not get an EPERM.

Is this a known issue of any sort?

Thanx,
b.

-- 
My other computer is your Microsoft Windows server.

Brian J. Murrell

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Re: intermittent EPERM

[Neil Brown]

On Wednesday October 4, brian@interlinx.bc.ca wrote:
> Since having upgraded my Ubuntu (edgy) kernel I have noticed the last
> few revs of it cause intermittent EPERM errors on NFS clients.  For
> example:
> 
> brian@pc:~$ sudo mount pc:/home/brian /mnt/test
> brian@pc:~$ cd /mnt/test
> brian@pc:/mnt/test$ cat .bash_profile
> cat: .bash_profile: Permission denied
> brian@pc:/mnt/test$ cat .bash_profile
> cat: .bash_profile: Permission denied
> brian@pc:/mnt/test$ cat .bash_profile
> # .bash_profile
> 
> # Get the aliases and functions
> if [ -f ~/.bashrc ]; then
>         . ~/.bashrc
> fi
> 
> It took three attempts at reading that file to not get an EPERM.
> 
> Is this a known issue of any sort?

Yep.  It should be fixed in 2.6.18 and recent 2.6.17.x releases.
You can work-around by exporting with no_subtree_check (which is a
good idea anyway and will be the default one day soon).

NeilBrown

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