Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757279AbXJaMQS (ORCPT ); Wed, 31 Oct 2007 08:16:18 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755074AbXJaMQI (ORCPT ); Wed, 31 Oct 2007 08:16:08 -0400 Received: from iucha.net ([209.98.146.184]:48861 "EHLO mail.iucha.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754427AbXJaMQH (ORCPT ); Wed, 31 Oct 2007 08:16:07 -0400 Date: Wed, 31 Oct 2007 07:16:06 -0500 From: Florin Iucha To: Fengguang Wu Cc: Linux Kernel Mailing List , Trond Myklebust , Peter Zijlstra Subject: Re: pdflush stuck in D state with v2.6.24-rc1-192-gef49c32 Message-ID: <20071031121606.GR25561@iucha.net> References: <20071028152428.GJ7918@iucha.net> <20071030114250.GL25561@iucha.net> <20071031000242.GP25561@iucha.net> <20071031035245.GQ25561@iucha.net> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="+bDoS+V4AJZnUgoC" Content-Disposition: inline In-Reply-To: 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/1.5.16 (2007-06-11) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4034 Lines: 90 --+bDoS+V4AJZnUgoC Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Wed, Oct 31, 2007 at 02:53:25PM +0800, Fengguang Wu wrote: > On Tue, Oct 30, 2007 at 10:52:45PM -0500, Florin Iucha wrote: > > On Tue, Oct 30, 2007 at 07:02:42PM -0500, Florin Iucha wrote: > > > I have added the patches and started a linux kernel compilation, and > > > something really interesting happens. I run the build with the > > > equivalent of "make -j3" and in a separate console I am watching the > > > build with 'top'. The build consumes 98% of both CPUs. If I stop the > > > output in the build console with "Ctrl-S", one core goes to idle, > > > while the other is in 50% waiting, then goes to 75% waiting. When I > > > resume the build with "Ctrl-Q", the build starts to use both CPUs at > > > 98-99%. The NFS4 use was minimal, as I did not login with Gnome, but > > > just logged on the console. Also, the CPU that is in 75% waiting > > > state changes occasionally. 'Top' shows pdflush in D state, using > > > 5-6% of CPU. > >=20 > > I forgot the traces: > >=20 > > http://iucha.net/2.6.24-rc1/fw.1.gz > > http://iucha.net/2.6.24-rc1/fw.2.gz > > http://iucha.net/2.6.24-rc1/fw.3.gz >=20 > Sorry for the delay - I've been fixing our server today. >=20 > [ 263.685691] mm/page-writeback.c 655 wb_kupdate: pdflush(248) 24235 glo= bal 4593 0 0 wc _M tw 1024 sk 0 > [ 263.789648] requeue_io 301: inode 4031199 size 562 at 08:07(sda7) > [ 263.789656] requeue_io 301: inode 4031231 size 329 at 08:07(sda7) > [ 263.789660] requeue_io 301: inode 4031255 size 177 at 08:07(sda7) > [ 263.789664] requeue_io 301: inode 4031268 size 94 at 08:07(sda7) > [ 263.789667] requeue_io 301: inode 4031329 size 88 at 08:07(sda7) > [ 263.789671] requeue_io 301: inode 4031351 size 74 at 08:07(sda7) > [ 263.789674] requeue_io 301: inode 4031408 size 175 at 08:07(sda7) > [ 263.789678] requeue_io 301: inode 4031413 size 129 at 08:07(sda7) > [ 263.789681] requeue_io 301: inode 4031415 size 391 at 08:07(sda7) > [ 263.789690] mm/page-writeback.c 655 wb_kupdate: pdflush(248) 24235 glo= bal 4593 0 0 wc _M tw 1024 sk 0 > [ 263.890184] requeue_io 301: inode 4031199 size 562 at 08:07(sda7) > [ 263.890191] requeue_io 301: inode 4031231 size 329 at 08:07(sda7) > [ 263.890195] requeue_io 301: inode 4031255 size 177 at 08:07(sda7) > [ 263.890198] requeue_io 301: inode 4031268 size 94 at 08:07(sda7) > [ 263.890202] requeue_io 301: inode 4031329 size 88 at 08:07(sda7) > [ 263.890205] requeue_io 301: inode 4031351 size 74 at 08:07(sda7) > [ 263.890208] requeue_io 301: inode 4031408 size 175 at 08:07(sda7) > [ 263.890212] requeue_io 301: inode 4031413 size 129 at 08:07(sda7) > [ 263.890215] requeue_io 301: inode 4031415 size 391 at 08:07(sda7) > [ 263.890223] mm/page-writeback.c 655 wb_kupdate: pdflush(248) 24235 glo= bal 4593 0 0 wc _M tw 1024 sk 0 >=20 > It's about sda7, not NFSv4. >=20 > Is it a Reiserfs? We have a fresh fix for it: http://lkml.org/lkml/2007/1= 0/23/93 Yes, it is a Reiserfs. Incidentally it is the partition that holds the kernel sources and build directory. The message states that the same bug exists in 2.6.23 but I do not see the same behavior in 2.6.23. Anyway, I will apply the patch and see what I get. Thanks, florin --=20 Bruce Schneier expects the Spanish Inquisition. http://geekz.co.uk/schneierfacts/fact/163 --+bDoS+V4AJZnUgoC 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) iD8DBQFHKHIGND0rFCN2b1sRAvnLAKClLx1KUqruZCSotQtzaSLE7Vp5MwCeJT0b dZhOpebE9AlMatC7RN3ANgQ= =jWh9 -----END PGP SIGNATURE----- --+bDoS+V4AJZnUgoC-- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/