Weird lockups when using NFSv4

[Trond Myklebust]

On Fri, 2007-08-10 at 05:11 +0200, Fredrik Tolf wrote:
> On Fri, 2007-08-10 at 03:52 +0200, Fredrik Tolf wrote:
> > I'll try and present the facts that I know right
> > now and hope that someone will be able to help me a bit on the way.
> 
> Btw., I'm using Gentoo's Linux sources, version 2.6.21-r4. To my
> knowledge, they should match 2.6.21.6 without any changes whatsoever to
> the NFS code.

Could it be related to delegations? Have a look at
the /proc/self/mountstats DELEGRETURN statistics on the various clients
that might be sharing the same file...

Trond