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From: florin@iucha.net (Florin Iucha)
To: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
	Linus Torvalds <torvalds@linux-foundation.org>,
	Peter Zijlstra <a.p.zijlstra@chello.nl>,
	Adrian Bunk <bunk@stusta.de>,
	OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH 0/4] 2.6.21-rc7 NFS writes: fix a series of issues
Date: Wed, 18 Apr 2007 20:52:33 -0500	[thread overview]
Message-ID: <20070419015232.GO24044@iucha.net> (raw)
In-Reply-To: <1176905506.6796.84.camel@heimdal.trondhjem.org>

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On Wed, Apr 18, 2007 at 10:11:46AM -0400, Trond Myklebust wrote:
> Do you have a copy of wireshark or ethereal on hand? If so, could you
> take a look at whether or not any NFS traffic is going between the
> client and server once the hang happens?

I used the following command 

   tcpdump -w nfs-traffic -i eth0 -vv -tt dst port nfs

to capture

   http://iucha.net/nfs/21-rc7-nfs4/nfs-traffic.bz2

I started the capture before starting the copy and left it to run for
a few minutes after the traffic slowed to a crawl.

The iostat and vmstat are at:

   http://iucha.net/nfs/21-rc7-nfs4/iostat
   http://iucha.net/nfs/21-rc7-nfs4/vmstat
   
It seems that my original problem report had a big mistake!  There is
no hang, but at some point the write slows down to a trickle (from
40,000 blocks/s to 22 blocks/s) as can be seen from the iostat log.

Regards,
florin

-- 
Bruce Schneier expects the Spanish Inquisition.
      http://geekz.co.uk/schneierfacts/fact/163

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  parent reply	other threads:[~2007-04-19  1:52 UTC|newest]

Thread overview: 43+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <1176736734.6761.45.camel@heimdal.trondhjem.org>
     [not found] ` <Pine.LNX.4.64.0704160904560.5473@woody.linux-foundation.org>
     [not found]   ` <1176740307.6761.56.camel@heimdal.trondhjem.org>
     [not found]     ` <1176741408.6761.62.camel@heimdal.trondhjem.org>
     [not found]       ` <20070416125905.GA2769@iucha.net>
     [not found]         ` <1176792399.3035.30.camel@twins>
     [not found]           ` <1176796503.3035.33.camel@twins>
2007-04-17 17:01             ` nfs: desynchronized value of nfs_i.ncommit OGAWA Hirofumi
2007-04-17 22:44               ` Trond Myklebust
2007-04-18  1:19               ` [PATCH 0/4] 2.6.21-rc7 NFS writes: fix a series of issues Trond Myklebust
2007-04-18  1:29                 ` [PATCH 1/4] NFS: clean up the unstable write code Trond Myklebust
2007-04-18  1:29                 ` [PATCH 2/4] NFS: Don't clear PG_writeback until after we've processed unstable writes Trond Myklebust
2007-04-18  1:29                 ` [PATCH 3/4] NFS: Fix the 'desynchronized value of nfs_i.ncommit' error Trond Myklebust
2007-04-18  1:29                 ` [PATCH 4/4] NFS: Fix race in nfs_set_page_dirty Trond Myklebust
2007-04-18  2:58                 ` [PATCH 0/4] 2.6.21-rc7 NFS writes: fix a series of issues Andrew Morton
2007-04-18  3:06                   ` Trond Myklebust
2007-04-18  3:30                     ` Florin Iucha
2007-04-18  3:54                       ` Trond Myklebust
2007-04-18  4:07                         ` Florin Iucha
2007-04-18  4:13                           ` Andrew Morton
2007-04-18  4:30                             ` Florin Iucha
2007-04-18  5:14                               ` Linus Torvalds
2007-04-18  5:26                                 ` Florin Iucha
2007-04-18  5:37                                 ` Andrew Morton
2007-04-18 12:38                                   ` Florin Iucha
2007-04-18 13:15                                     ` Trond Myklebust
2007-04-18 13:42                                       ` Florin Iucha
2007-04-18 14:11                                         ` Trond Myklebust
2007-04-18 14:17                                           ` Florin Iucha
2007-04-18 14:19                                             ` Trond Myklebust
2007-04-19  1:52                                           ` Florin Iucha [this message]
2007-04-19  2:45                                             ` Trond Myklebust
2007-04-19  4:38                                               ` Success! Was: " Florin Iucha
2007-04-19 15:12                                               ` Chuck Lever
2007-04-19 15:17                                                 ` Trond Myklebust
2007-04-19 15:50                                                   ` Florin Iucha
2007-04-19 16:09                                                     ` Trond Myklebust
2007-04-19 19:58                                                       ` Failure! " Florin Iucha
2007-04-19 21:30                                                         ` Trond Myklebust
2007-04-19 21:49                                                           ` Florin Iucha
2007-04-20 13:30                                                             ` Success! Was: " Florin Iucha
2007-04-20 13:37                                                               ` Trond Myklebust
2007-04-20 13:51                                                                 ` Florin Iucha
2007-04-18 14:14                                         ` Florin Iucha
2007-04-29 19:41                                   ` Rogier Wolff
2007-04-29 20:09                                     ` Peter Zijlstra
2007-04-18 11:38                           ` Trond Myklebust
2007-04-18  9:54                     ` OGAWA Hirofumi
2007-04-18  8:19                 ` Peter Zijlstra
2007-04-18 16:41                   ` Peter Zijlstra

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