NFS client eventually stalls with automount

NFS client eventually stalls with automount

[Michael Feig]

Hi!

Here is the problem. When I try to read and write at the same time (it 
shows up when trying to create a tar file)
on an automounted directory the process starts up fine, but pretty 
quickly slows down and eventually
stalls completely. The process is then frozen but reacts to a kill 
signal after a few minutes.
At the same time I have seen kernel messages such as 

Jun 25 17:37:05 vangogh kernel: nfs: task 39046 can't get a request slot
Jun 25 17:37:37 vangogh kernel: nfs: server bebop OK
....

Networking seems to be fine otherwise, in particular I have no problems 
when I just read OR write from the same
disk (as when I would create a tar file on a local disk from the mounted 
directory).

I ran into this with the RedHat 7.3 distribution kernel (2.4.18) but 
also tried the very latest 2.4.19-rc1 with
Trond's latest NFS_ALL patches (for pre10).

The machine from where the disk is server is running SGI IRIX 6.5 and 
nfsstat shows that I am using
NFS V3.

So far I did not change any NFS options such as buffer size yet.

Any suggestions?

Thanks.

-- 
 Michael Feig                           meikel@scripps.edu 

 The Scripps Research Institute, La Jolla, CA





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Re: NFS client eventually stalls with automount

[H. J. Lu]

On Wed, Jun 26, 2002 at 05:23:52PM -0700, Michael Feig wrote:
> shows up when trying to create a tar file)
> on an automounted directory the process starts up fine, but pretty 
> quickly slows down and eventually
> 
> I ran into this with the RedHat 7.3 distribution kernel (2.4.18) but 
> also tried the very latest 2.4.19-rc1 with
> Trond's latest NFS_ALL patches (for pre10).

I won't use autofs in RedHat 7.3 myself. It doesn't even support
autofs4.


H.J.


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