nfs: server X not responding, still trying

Hola,

I have a number of client boxes that are mounting a single nfs file-server (presently all machines are slackware 9.0; nfs-utils-1.0.6; 2.4.20 kernel) over a 100bt switched private network which is not congested at all. The machines are all using the original Becker EtherExpressPro/100 kernel modules statically compiled.

When all of the above machines were running 2.4.22, each machine had a *constant* barrage of these in the syslog:

Nov  3 15:44:24 hostXX kernel: nfs: server fileserver-priv not responding,
still trying
Nov  3 15:44:25 hostXX kernel: nfs: server fileserver-priv OK
Nov  3 15:46:17 hostXX kernel: nfs: server fileserver-priv not responding,
still trying
Nov  3 15:46:17 hostXX kernel: nfs: server fileserver-priv OK

The client mount/fstab options are:
"rw,async,intr,vers=3,rsize=32768,wsize=32768" and the server's exports options are: "rw,no_root_squash,async,no_subtree_check".

After digging through the archives, I found some references to Trond's patches for 2.4.22 (which didn't seem to help in this situation) as well as suggestions to revert back to 2.4.20 which seem to have helped the situation. I also tried using TCP which worked great, but the performance hit was too great.

These error accumulations now are much more rare with 2.4.20, however they still exist and performance is still not what it should be. Also, we really would prefer to run current release-quality kernel revs.

Does anyone have any suggestions as to what to try next?

--
Tim Wesemann

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