From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S264095AbTE0TaU (ORCPT ); Tue, 27 May 2003 15:30:20 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S264099AbTE0TaS (ORCPT ); Tue, 27 May 2003 15:30:18 -0400 Received: from ns.virtualhost.dk ([195.184.98.160]:18309 "EHLO virtualhost.dk") by vger.kernel.org with ESMTP id S264095AbTE0TaH (ORCPT ); Tue, 27 May 2003 15:30:07 -0400 Date: Tue, 27 May 2003 21:43:22 +0200 From: Jens Axboe To: Linus Torvalds Cc: James Bottomley , Linux Kernel Subject: Re: [BK PATCHES] add ata scsi driver Message-ID: <20030527194322.GV845@suse.de> References: <20030527065436.GX845@suse.de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Tue, May 27 2003, Linus Torvalds wrote: > > On Tue, 27 May 2003, Jens Axboe wrote: > > > > Here's something ridicolously simple, that just wont start a new tag if > > the oldest tag is older than 100ms. Clearly nothing for submission, but > > it gets the point across. > > Yes, I think something like this should work very well. Agree, it should take the edge of crappy hardware at least. > In fact, it might fit in very well indeed with AS - and in general it > might be a good idea to have some nice interface for the IO scheduler to > give this kind of ordering hints down to the hardware. And deadline, they share the same request expire mechanism. But I read your hint, I'll add the hint and fix this for real. Was waiting for the other tcq patch to be comitted as they overlap, but I see that is in so... -- Jens Axboe