Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754023AbYBTLfb (ORCPT ); Wed, 20 Feb 2008 06:35:31 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751242AbYBTLfV (ORCPT ); Wed, 20 Feb 2008 06:35:21 -0500 Received: from neuf-infra-smtp-out-sp604007av.neufgp.fr ([84.96.92.120]:49284 "EHLO neuf-infra-smtp-out-sp604007av.neufgp.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751159AbYBTLfU convert rfc822-to-8bit (ORCPT ); Wed, 20 Feb 2008 06:35:20 -0500 In-Reply-To: <47840EB2.2010300@shaw.ca> References: <4782C3DB.1090201@shaw.ca> <2A722A49-F024-44E9-9FC8-7B714FB25626@neuf.fr> <47840EB2.2010300@shaw.ca> Mime-Version: 1.0 (Apple Message framework v753) Content-Type: text/plain; charset=ISO-8859-1; delsp=yes; format=flowed Message-Id: Cc: linux-kernel@vger.kernel.org, ide Content-Transfer-Encoding: 8BIT From: =?ISO-8859-1?Q?Guillaume_Laur=E8s?= Subject: Re: PROBLEM: I/O scheduler problem with an 8 SATA disks raid 5 under heavy load ? Date: Wed, 20 Feb 2008 12:35:14 +0100 To: Robert Hancock X-Mailer: Apple Mail (2.753) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1655 Lines: 42 Hello all, A bit of update to this issue. Switching the cabling of the most problematic drive with a new one didn't fix the issue. I couldn't yet switch the power supply with a more powerful one. However I temporarily added a pci-e SATA host and another drive, the situation was just as bad, not worse ;-) This HBA just had 2 ports, so I couldn't swap it completely with the nvidia ports. Just as a guess I added sata_nv.adma=0 and the problem completly disappeared for 4 weeks now. Removing it from cmdline just make it come back. Unfortunately I'm running xen on this host so I don't think adma patches if any may be suitable to me, at least as long as something > 2.6.20 doesn't come in gentoo for xen... Regards, GoM Le 9 janv. 08 ? 01:00, Robert Hancock a ?crit : >> So it seems to be either a cabling problem or a bug with sata_nv ? >> I'm running gentoo's 2.6.20-xen, and maybe my problem looks like >> the sata_nv/adma/samsung problems reports I can see on the net ? > > I don't think it's the same problem. In that case the controller > appears to indicate that it didn't even start processing the > command. In this case it's indicating that the command was sent to > the drive and is still waiting for it to indicate completion. > > It could be a cabling problem, yes. Also, are you sure your power > supply is able to handle the power draw of that many drives? -- 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/