Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1422693AbXBHFBS (ORCPT ); Thu, 8 Feb 2007 00:01:18 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1422713AbXBHFBS (ORCPT ); Thu, 8 Feb 2007 00:01:18 -0500 Received: from shawidc-mo1.cg.shawcable.net ([24.71.223.10]:20861 "EHLO pd3mo1so.prod.shaw.ca" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1422693AbXBHFBR (ORCPT ); Thu, 8 Feb 2007 00:01:17 -0500 Date: Wed, 07 Feb 2007 22:56:45 -0600 From: Robert Hancock Subject: Re: PROBLEM: sata timeouts with intel 82801HB on amd64 In-reply-to: To: Paolo Ornati , linux-kernel Cc: Trevor Offner Caira Message-id: <45CAAD8D.7030007@shaw.ca> MIME-version: 1.0 Content-type: text/plain; charset=ISO-8859-1; format=flowed Content-transfer-encoding: 7bit References: User-Agent: Thunderbird 1.5.0.9 (Windows/20061207) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 834 Lines: 20 Paolo Ornati wrote: > If mounting XFS with "nobarrier" fixes the problem it seems that more > than one Seagate disk cannot handle the Cache Flush command while other > commands are in fly... It's not allowed to overlap NCQ (FPDMA read/write) commands with any other commands such as cache flushes. libata core guarantees that this doesn't happen by deferring such requests until the FPDMA commands are complete. (At least, it's supposed to..) -- Robert Hancock Saskatoon, SK, Canada To email, remove "nospam" from hancockr@nospamshaw.ca Home Page: http://www.roberthancock.com/ - 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/