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

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Date:	Tue, 04 Nov 2008 19:10:21 +0000
From:	Ian Campbell <ijc@...lion.org.uk>
To:	Trond Myklebust <trond.myklebust@....uio.no>
Cc:	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 Sat, 2008-11-01 at 09:41 -0400, Trond Myklebust wrote:
> On Sat, 2008-11-01 at 11:45 +0000, Ian Campbell wrote:
> > On Mon, 2008-10-20 at 07:27 +0100, Ian Campbell wrote:
> > > So far I have bisected down to this range and am currently testing
> > > acee478 which has been up for >4days.
> > 
> > Another update. It has now bisected down to a small range 
> > 
> > 7272dcd31d56580dee7693c21e369fd167e137fe SUNRPC: xprt_autoclose() should not call xprt_disconnect()
> > e06799f958bf7f9f8fae15f0c6f519953fb0257c SUNRPC: Use shutdown() instead of close() when disconnecting a TCP socket
> > ef80367071dce7d2533e79ae8f3c84ec42708dc8 SUNRPC: TCP clear XPRT_CLOSE_WAIT when the socket is closed for writes
> > 3b948ae5be5e22532584113e2e02029519bbad8f SUNRPC: Allow the client to detect if the TCP connection is closed
> > 67a391d72ca7efb387c30ec761a487e50a3ff085 SUNRPC: Fix TCP rebinding logic
> > 66af1e558538137080615e7ad6d1f2f80862de01 SUNRPC: Fix a race in xs_tcp_state_change()
> > 
> > I'm currently testing 3b948ae5be5e22532584113e2e02029519bbad8f.
> > 
> > 7272dcd31d56580dee7693c21e369fd167e137fe repro'd in half a day while
> > ef818a28fac9bd214e676986d8301db0582b92a9 (parent of
> > 66af1e558538137080615e7ad6d1f2f80862de01) survived for 7 days.
> > 
> > Ian.
> 
> Have you tested with the TCP RST fix yet? It has been merged into
> mainline, so it should be in the latest 2.6.28-git, but I've attached it
> so you can apply it to your test kernel...

I cherry picked 2a9e1cfa23fb62da37739af81127dab5af095d99 onto v2.6.25
and unfortunately it has not fixed the issue. I'll go back to bisecting
with 3b948ae5be5e22532584113e2e02029519bbad8f.

Ian.

> 
> Cheers
>   Trond
> 
-- 
Ian Campbell

Superior ability breeds superior ambition.
		-- Spock, "Space Seed", stardate 3141.9

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