linux-kernel - Re: NFS regression? Odd delays and lockups accessing an NFS export.

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Message-Id: <1219442213.9097.25.camel@localhost>
Date:	Fri, 22 Aug 2008 14:56:53 -0700
From:	Trond Myklebust <trond.myklebust@....uio.no>
To:	Ian Campbell <ijc@...lion.org.uk>
Cc:	John Ronciak <john.ronciak@...il.com>,
	Grant Coady <gcoady.lk@...il.com>,
	linux-kernel@...r.kernel.org, neilb@...e.de, bfields@...ldses.org,
	linux-nfs@...r.kernel.org,
	Jeff Kirsher <jeffrey.t.kirsher@...el.com>,
	Jesse Brandeburg <jesse.brandeburg@...el.com>,
	Bruce Allan <bruce.w.allan@...el.com>,
	PJ Waskiewicz <peter.p.waskiewicz.jr@...el.com>,
	John Ronciak <john.ronciak@...el.com>,
	e1000-devel@...ts.sourceforge.net
Subject: Re: NFS regression? Odd delays and lockups accessing an NFS export.

On Fri, 2008-08-22 at 22:37 +0100, Ian Campbell wrote:
> I can ssh to the server fine. The same server also serves my NFS home
> directory to the box I'm writing this from and I've not seen any trouble
> with this box at all, it's a 2.6.18-xen box.

OK... Are you able to reproduce the problem reliably?

If so, can you provide me with a binary tcpdump or wireshark dump? If
using tcpdump, then please use something like

   tcpdump -w /tmp/dump.out -s 90000 host myserver.foo.bar and port 2049

Please also try to provide a netstat dump of the current TCP connections
as soon as the hang occurs:

  netstat -t

Cheers
  Trond

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