From: Ian Campbell <ijc@hellion.org.uk>
To: Trond Myklebust <trond.myklebust@fys.uio.no>
Cc: linux-nfs@vger.kernel.org, Max Kellermann <mk@cm4all.com>,
       linux-kernel@vger.kernel.org, gcosta@redhat.com,
       Grant Coady <grant_lkml@dodo.com.au>,
       "J. Bruce Fields" <bfields@fieldses.org>,
       Tom Tucker <tom@opengridcomputing.com>
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Date: Tue, 25 Nov 2008 14:04:37 +0000
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Subject: Re: [PATCH] NFS regression in 2.6.26?, "task blocked for more than
	120 seconds"
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On Tue, 2008-11-25 at 08:57 -0500, Trond Myklebust wrote:
> On Tue, 2008-11-25 at 13:38 +0000, Ian Campbell wrote:
> > > That would indicate that the server is failing to close the TCP
> > > connection when the client closes on its end.
> > > 
> > > Could you remind me what server you are using?
> > 
> > 2.6.25-2-486 which is a Debian package from backports.org, changelog
> > indicates that it contains 2.6.25.7.
> 
> Hmm... It should normally close sockets when the state changes. There
> might be a race, though...
> 
> > > Also, does 'netstat -t'
> > > show connections that are stuck in the CLOSE_WAIT state when you see the
> > > hang?
> > 
> > I'd have to wait for it to reproduce again to be 100% sure but according
> > to http://lkml.indiana.edu/hypermail/linux/kernel/0808.3/0120.html
> > I was seeing connections in FIN_WAIT2 but not CLOSE_WAIT.
> 
> That would be on the client side. I'm talking about the server.

Ah, OK. I'll abort my current test of 2.6.26+revert and wait for a repro
so I can netstat the server, give me a couple of days...

Ian.
-- 
Ian Campbell

It is more rational to sacrifice one life than six.
		-- Spock, "The Galileo Seven", stardate 2822.3

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