From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261261AbVHAUmN (ORCPT ); Mon, 1 Aug 2005 16:42:13 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261260AbVHAUmK (ORCPT ); Mon, 1 Aug 2005 16:42:10 -0400 Received: from ns.virtualhost.dk ([195.184.98.160]:27882 "EHLO virtualhost.dk") by vger.kernel.org with ESMTP id S261261AbVHAUkm (ORCPT ); Mon, 1 Aug 2005 16:40:42 -0400 Date: Mon, 1 Aug 2005 22:42:42 +0200 From: Jens Axboe To: Jeff Garzik Cc: Daniel Drake , Otto Meier , linux-kernel@vger.kernel.org, linux-ide@vger.kernel.org Subject: Re: Driver for sata adapter promise sata300 tx4 Message-ID: <20050801204241.GU22569@suse.de> References: <42EDE918.9040807@gmx.net> <42EE3501.7010107@gentoo.org> <42EE3FB8.10008@gmx.net> <42EE4ADF.4080502@gentoo.org> <20050801201756.GQ22569@suse.de> <20050801203228.GS22569@suse.de> <42EE87DF.1080508@pobox.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <42EE87DF.1080508@pobox.com> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Aug 01 2005, Jeff Garzik wrote: > Jens Axboe wrote: > >Oh, and forget TCQ. It's a completely worthless technology inherited > >from PATA, > > Agreed. > > There are a few controllers where we may -eventually- add TCQ support, > controllers that do 100% of TCQ in hardware. But that's so far down the > priority list, it's below just about everything else. > > There may just be little motivation to -ever- support TCQ, even when > libata is the 'main' IDE driver, sometime in the future. Host supported TCQ only removes the pain from the software side, it still doesn't make it a fast techology. The only reason you would want to support that would be "it's easy, why not...". From my POV, I would refuse to support it just from an ideological standpoint :-) Legacy TCQ, hell no, not in a million years. -- Jens Axboe