Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S964910AbWALMeN (ORCPT ); Thu, 12 Jan 2006 07:34:13 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S964912AbWALMeN (ORCPT ); Thu, 12 Jan 2006 07:34:13 -0500 Received: from mexforward.lss.emc.com ([168.159.213.200]:39999 "EHLO mexforward.lss.emc.com") by vger.kernel.org with ESMTP id S964910AbWALMeM (ORCPT ); Thu, 12 Jan 2006 07:34:12 -0500 Message-ID: <43C64C3B.5070704@emc.com> Date: Thu, 12 Jan 2006 07:31:55 -0500 From: Ric Wheeler User-Agent: Mozilla Thunderbird 1.0.7 (X11/20050923) X-Accept-Language: en-us, en MIME-Version: 1.0 To: Reuben Farrelly CC: Tejun Heo , Jens Axboe , Andrew Morton , neilb@suse.de, mingo@elte.hu, linux-kernel@vger.kernel.org, Jeff Garzik Subject: Re: 2.6.15-mm2 References: <20060111115616.GE3389@suse.de> <43C518BC.5090903@reub.net> <20060111145201.GS3389@suse.de> <20060111145504.GT3389@suse.de> <43C55B31.5000201@reub.net> <20060111194517.GE5373@suse.de> <20060111195349.GF5373@suse.de> <43C5D1CA.7000400@reub.net> <20060112080051.GA22783@htj.dyndns.org> <43C61598.7050004@reub.net> <20060112111846.GA19976@htj.dyndns.org> <43C645ED.40905@reub.net> In-Reply-To: <43C645ED.40905@reub.net> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-PMX-Version: 4.7.1.128075, Antispam-Engine: 2.1.0.0, Antispam-Data: 2006.01.12.035104 X-PerlMx-Spam: Gauge=, SPAM=1%, Reasons='EMC_FROM_00+ -3, __CT 0, __CTE 0, __CT_TEXT_PLAIN 0, __HAS_MSGID 0, __MIME_TEXT_ONLY 0, __MIME_VERSION 0, __SANE_MSGID 0, __USER_AGENT 0' Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1609 Lines: 45 Reuben Farrelly wrote: > > > On 13/01/2006 12:18 a.m., Tejun Heo wrote: > >> On Thu, Jan 12, 2006 at 09:38:48PM +1300, Reuben Farrelly wrote: >> [--snip--] >> >>> [start_ordered ] f7e8a708 -> c1b028fc,c1b029a4,c1b02a4c infl=1 >>> [start_ordered ] f74b0e00 0 48869571 8 8 1 1 c1ba9000 >>> [start_ordered ] BIO f74b0e00 48869571 4096 >>> [start_ordered ] ordered=31 in_flight=1 >>> [blk_do_ordered ] start_ordered f7e8a708->00000000 >>> [blk_do_ordered ] seq=02 f74ccd98->f74ccd98 >>> [blk_do_ordered ] seq=02 f74ccd98->f74ccd98 >>> [blk_do_ordered ] seq=02 c1b028fc->00000000 >>> [blk_do_ordered ] seq=02 c1b028fc->00000000 >>> [blk_do_ordered ] seq=02 c1b028fc->00000000 >> >> >> Yeap, this one is the offending one. 0xf74ccd98 got requeued in front >> of pre-flush while draining and when it finished it didn't complete >> draining thus hanging the queue. It seems like it's some kind of >> special request which probably fails and got retried. Are you using >> SMART or something which issues special commands to drives? > > > No SMART, although I should be (rebuilt the system a few months > ago..and must > have missed it). > > Are there any other things which could be contributing to this? > > Could this be hdparm or something tweaking the drive write cache settings, etc? ric - 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/