From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759048AbXFUVgP (ORCPT ); Thu, 21 Jun 2007 17:36:15 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756206AbXFUVgA (ORCPT ); Thu, 21 Jun 2007 17:36:00 -0400 Received: from outpipe-village-512-1.bc.nu ([81.2.110.250]:55220 "EHLO the-village.bc.nu" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1755140AbXFUVf6 (ORCPT ); Thu, 21 Jun 2007 17:35:58 -0400 Date: Thu, 21 Jun 2007 22:41:02 +0100 From: Alan Cox To: Sergei Shtylyov Cc: Linas Vepstas , Bartlomiej Zolnierkiewicz , Stuart_Hayes@dell.com, linux-ide@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [BUG] ide dma_timer_expiry, then hard lockup Message-ID: <20070621224102.1ae04397@the-village.bc.nu> In-Reply-To: <467ABC4D.5010004@ru.mvista.com> References: <20070618175713.GD5836@austin.ibm.com> <4677FFF1.2010308@ru.mvista.com> <20070619164854.GR5836@austin.ibm.com> <200706192043.40298.bzolnier@gmail.com> <46783777.10607@ru.mvista.com> <20070620162845.GY5836@austin.ibm.com> <20070620180123.642316ae@the-village.bc.nu> <467ABC4D.5010004@ru.mvista.com> X-Mailer: Claws Mail 2.9.1 (GTK+ 2.10.8; i386-redhat-linux-gnu) Organization: Red Hat UK Cyf., Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SL4 1TE, Y Deyrnas Gyfunol. Cofrestrwyd yng Nghymru a Lloegr o'r rhif cofrestru 3798903 Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org > > queue ? You are overestimating IDE ;) > > He's not -- there is queued commands support since ATA[PI]-5. I'm not sure > why but Linux decided not to support it. Almost no hardware supports it and the functionality is really really ugly to use when it works at all - NCQ is rather more elegant. Alan