From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751702AbWD0Vjg (ORCPT ); Thu, 27 Apr 2006 17:39:36 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751703AbWD0Vjf (ORCPT ); Thu, 27 Apr 2006 17:39:35 -0400 Received: from prgy-npn2.prodigy.com ([207.115.54.38]:26485 "EHLO oddball.prodigy.com") by vger.kernel.org with ESMTP id S1751702AbWD0Vje (ORCPT ); Thu, 27 Apr 2006 17:39:34 -0400 Message-ID: <44513A0C.3020403@tmr.com> Date: Thu, 27 Apr 2006 17:39:24 -0400 From: Bill Davidsen User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8.0.2) Gecko/20060409 SeaMonkey/1.0.1 MIME-Version: 1.0 To: Nick Warne CC: linux-kernel@vger.kernel.org Subject: Re: scheduler question 2.6.16.x References: <200604251905.19004.nick@linicks.net> <20060425181530.GQ4102@suse.de> <200604251933.48363.nick@linicks.net> In-Reply-To: <200604251933.48363.nick@linicks.net> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Nick Warne wrote: > On Tuesday 25 April 2006 19:15, Jens Axboe wrote: > >>> But I can build both in... so I guess then the kernel decides what is >>> the best to use? Or should it be so I am only allowed to select one >>> or the other and allowing both is an oversight? >> See the option no more than two lines down from that, default io >> scheduler. Also see Documentation/block/switching-sched.txt and/or >> Documentation/kernel-parameters.txt (elevator=) section. > > Hi Jens, > > I haven't got the switching-sched.txt, although I found a sched-design.txt... > but what I meant was if I select whatever default, do/can I still need to > select either/or scheduler? > > i.e. why doesn't 'default selection option' only allow that scheduler to be > selected? Not clear is you mean "allow that to the the only selection" which it does, or "only allow that selection" which makes no sense, you can boot using any compiled scheduler. My configuration for beverage is set to "cask conditioned IPA" but I have most of the "Microbrewed" selections for IPA, PA, Stout and Porter compiled in. The "bland American and imported brews" section is disabled, with "water" enabled as a module. The preference is what you use by default, but not an irrevocable choice. -- -bill davidsen (davidsen@tmr.com) "The secret to procrastination is to put things off until the last possible moment - but no longer" -me