From: Trond Myklebust <trond.myklebust@fys.uio.no>
Subject: RE: 2.4.19 hang (was unlink perf pb !)
Date: Tue, 20 Aug 2002 00:40:28 +0200
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To: =?iso-8859-1?Q?Brasseur_Val=E9ry?= <Valery.Brasseur@atosorigin.com>
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>>>>> " " == Brasseur Val?ry <Valery.Brasseur@atosorigin.com> writes:

     > more on my problem ...
     > * it seems that when using tcp mount the hang appears more
     >   often and more
     > quickly !
     > * on stock 2.4.19 which I have is a limited perf but it works
     > * on 2.4.19 + nfs patches I have limited perf + hang !

     > I said I have limited perf because the NetApp filer I use as
     > server is a 880 which is given for more than 15000 nfs/ops and
     > with my Linux box I can't do more than 2/3000 ops when I am the
     > only client !

     > how can I track this down ?

Unless you are using some form of NAT (a.k.a. masquerading) it sounds
rather like you have some serious networking problems. Certainly I
have never heard of anybody having problems with hangs on both UDP
*and* TCP mounts - the latter in particular was designed to work
around network congestion problems.

Have you therefore tried things like swapping out the networking card
for another (preferably of a different make and different Linux
driver), and ditto for any switches/HUBs?

Cheers,
  Trond


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