Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752165AbXKMJgS (ORCPT ); Tue, 13 Nov 2007 04:36:18 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751396AbXKMJgH (ORCPT ); Tue, 13 Nov 2007 04:36:07 -0500 Received: from morrison.andev.ch ([213.133.123.55]:65487 "EHLO morrison.andev.ch" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750956AbXKMJgG (ORCPT ); Tue, 13 Nov 2007 04:36:06 -0500 Date: Tue, 13 Nov 2007 10:36:02 +0100 From: Petar Bogdanovic To: Milan Broz Cc: linux-kernel@vger.kernel.org, list+2007@smokva.net Subject: Re: dd/mke2fs on loopback hangs Message-ID: <20071113093602.GA5570@pintail.smokva.net> Mail-Followup-To: Milan Broz , linux-kernel@vger.kernel.org, list+2007@smokva.net References: <20071106131310.GA8628@pintail.smokva.net> <4730D6F3.8030500@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4730D6F3.8030500@redhat.com> User-Agent: Mutt/1.5.16 (2007-06-09) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1189 Lines: 32 On Tue, Nov 06, 2007 at 10:04:51PM +0100, Milan Broz wrote: > Petar Bogdanovic wrote: > > I experience some strange problems with my loopback-on-ext3-setup. > > After creating a plain `zeroed' dummy-file and doing a /dev/loop/0 on > > it, every dd or mke2fs hangs while doing certain write()s. Here are the > > steps just in order to show, how simple the setup is: > ... > > > P.S: $ uname -a > > Linux pintail 2.6.23-ARCH #1 SMP PREEMPT Sat Oct 27 09:04:14 UTC > > 2007 i686 Intel(R) Pentium(R) M processor 1.70GHz GenuineIntel > > GNU/Linux > > Hi Petar, > > I saw similar bug report for dm-crypt over loop but reproducible even > on stand-alone loop devices - see http://bugzilla.kernel.org/show_bug.cgi?id=8020 > > The problem was caused by loop io stalling in balance_dirty_pages. > > Per BDI dirty limit patchset (included in 2.6.24-rc) fixed it. Indeed, the problem disappeared on 2.6.24-rc2. Thanks again for the hint! Petar - 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/