linux-kernel - Re: [PATCH 0/4] 2.6.21-rc7 NFS writes: fix a series of issues

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Date:	Wed, 18 Apr 2007 07:38:07 -0400
From:	Trond Myklebust <Trond.Myklebust@...app.com>
To:	Florin Iucha <florin@...ha.net>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Adrian Bunk <bunk@...sta.de>,
	OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/4] 2.6.21-rc7 NFS writes: fix a series of issues

On Tue, 2007-04-17 at 23:07 -0500, Florin Iucha wrote:
> When 'big-copy' hangs, if I switch to a different console and run
> 'lsof', '[u]mount', or use shell completion on a network mount then that
> process goes into D state.  I cannot umount the network shares nor
> stop autofs.  I cannot do a clean reboot, I have to ssh
> in and "echo s > /proc/sysrq-trigger; echo u > /proc/sysrq-trigger;
> echo b > /proc/sysrq-trigger" .

What happens if you issue "echo 0 >/proc/sys/sunrpc/rpc_debug"?

> I am not mounting anything using CIFS, but I could give it a try.
> 
> I could transfer 75 GB without hiccup with 2.6.19 using NFS4 and CIFS,
> and with 2.6.20 using CIFS.  2.6.20 works fine under reasonably light
> load, with gnome sessions logging in and out several times a day.

How about NFSv3? I'd like to eliminate any issues with NFSv4 state.

I've also attached a little patch that I used in order to debug the list
consistency issues. Could you try it on top of the 4 I sent last night?

Cheers
  Trond



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