From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1031054AbXDSBwe (ORCPT ); Wed, 18 Apr 2007 21:52:34 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1031058AbXDSBwe (ORCPT ); Wed, 18 Apr 2007 21:52:34 -0400 Received: from iucha.net ([209.98.146.184]:55530 "EHLO mail.iucha.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1031054AbXDSBwe (ORCPT ); Wed, 18 Apr 2007 21:52:34 -0400 Date: Wed, 18 Apr 2007 20:52:33 -0500 To: Trond Myklebust Cc: Andrew Morton , Linus Torvalds , Peter Zijlstra , Adrian Bunk , OGAWA Hirofumi , linux-kernel@vger.kernel.org Subject: Re: [PATCH 0/4] 2.6.21-rc7 NFS writes: fix a series of issues Message-ID: <20070419015232.GO24044@iucha.net> References: <1176868485.6796.42.camel@heimdal.trondhjem.org> <20070418040730.GC24044@iucha.net> <20070417211350.ebba1493.akpm@linux-foundation.org> <20070418043040.GD24044@iucha.net> <20070417223738.8f49a39f.akpm@linux-foundation.org> <20070418123842.GF24044@iucha.net> <1176902131.6796.62.camel@heimdal.trondhjem.org> <20070418134225.GG24044@iucha.net> <1176905506.6796.84.camel@heimdal.trondhjem.org> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="wxIXENaY2CYUgF8u" Content-Disposition: inline In-Reply-To: <1176905506.6796.84.camel@heimdal.trondhjem.org> X-GPG-Key: http://iucha.net/florin_iucha.gpg X-GPG-Fingerprint: 5E59 C2E7 941E B592 3BA4 7DCF 343D 2B14 2376 6F5B User-Agent: Mutt/1.5.13 (2006-08-11) From: florin@iucha.net (Florin Iucha) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org --wxIXENaY2CYUgF8u Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable 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=20 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 =20 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 --=20 Bruce Schneier expects the Spanish Inquisition. http://geekz.co.uk/schneierfacts/fact/163 --wxIXENaY2CYUgF8u Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (GNU/Linux) iD8DBQFGJstgND0rFCN2b1sRAoQVAJ4qyHnoWVhmtWl5ZPlrJNsMT6RKMgCfXIWv Yg4UqU+uiWpAS2eKqzSvY3M= =uE6N -----END PGP SIGNATURE----- --wxIXENaY2CYUgF8u--