linux-kernel - Re: [PATCH] NFS regression in 2.6.26?, "task blocked for more than 120 seconds"

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Message-Id: <1227621434.7057.33.camel@heimdal.trondhjem.org>
Date:	Tue, 25 Nov 2008 08:57:14 -0500
From:	Trond Myklebust <trond.myklebust@....uio.no>
To:	Ian Campbell <ijc@...lion.org.uk>
Cc:	linux-nfs@...r.kernel.org, Max Kellermann <mk@...all.com>,
	linux-kernel@...r.kernel.org, gcosta@...hat.com,
	Grant Coady <grant_lkml@...o.com.au>,
	"J. Bruce Fields" <bfields@...ldses.org>,
	Tom Tucker <tom@...ngridcomputing.com>
Subject: Re: [PATCH] NFS regression in 2.6.26?, "task blocked for more than
 120 seconds"

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.

Cheers
  Trond

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