problem with nfs latency during high IO

[Judith Flo Gaya <jflo@imppc.org>]

Hello,

I was told some days ago that my problem with my NFS system is related 
to this bug, as the problem that I'm experiencing is quite similar.

The bug : https://bugzilla.redhat.com/show_bug.cgi?id=469848

The link itself explains quite well my issue, I'm just truing to copy a 
big file (36Gb) to my nfs server and when I try to get an ls -l command 
to the same folder where I'm copying data, the command gets stuck for 
some time. This amount of time changes from a few secs to SOME minutes 
(9' is the current record).
I can live with some seconds of delay, but minutes is something quite 
unacceptable.

As this is an nfs server running on a red hat system (an HP ibrix x9300 
with Red Hat 5.3 x86_64, kernel 2.6.18-128) I was told to apply the 
patch suggested from the bug on my clients.

Unfortunately my clients are running fedora core 14 (x86_64, kernel 
2.6.35.6-45) and I can't find the file that they are referring to, the 
file fs/nfs/inode.c is not there and I can't find the rpm that contains it.

As the bug is a very very old one, I took it for granted that is already 
applied to fedora, but I wanted to make sure that it is looking at the 
file.

Can you help me on this? I'm I wrong in my supposition (is the patch 
really applied)? is it possible that my problem is somewhere else?

Thanks a lot in advance for your help, please let me know if I can 
provide any more information.
j