Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S266491AbUJIFVG (ORCPT ); Sat, 9 Oct 2004 01:21:06 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S266505AbUJIFVF (ORCPT ); Sat, 9 Oct 2004 01:21:05 -0400 Received: from viper.oldcity.dca.net ([216.158.38.4]:65442 "HELO viper.oldcity.dca.net") by vger.kernel.org with SMTP id S266491AbUJIFVB (ORCPT ); Sat, 9 Oct 2004 01:21:01 -0400 Subject: Re: voluntary-preempt-2.6.9-rc3-mm3-T3 From: Lee Revell To: Con Kolivas Cc: Ingo Molnar , linux-kernel , "K.R. Foley" , Rui Nuno Capela , Florian Schmidt , Mark_H_Johnson@raytheon.com, Fernando Pablo Lopez-Lezcano In-Reply-To: References: <20040921071854.GA7604@elte.hu> <20040921074426.GA10477@elte.hu> <20040922103340.GA9683@elte.hu> <20040923122838.GA9252@elte.hu> <20040923211206.GA2366@elte.hu> <20040924074416.GA17924@elte.hu> <20040928000516.GA3096@elte.hu> <20041003210926.GA1267@elte.hu> <20041004215315.GA17707@elte.hu> <20041005134707.GA32033@elte.hu> <20041007105230.GA17411@elte.hu> <1097297824.1442.132.camel@krustophenia.net> Content-Type: text/plain Message-Id: <1097299260.1442.142.camel@krustophenia.net> Mime-Version: 1.0 X-Mailer: Ximian Evolution 1.4.6 Date: Sat, 09 Oct 2004 01:21:00 -0400 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 889 Lines: 27 On Sat, 2004-10-09 at 01:09, Con Kolivas wrote: > Lee Revell writes: > > > On Thu, 2004-10-07 at 06:52, Ingo Molnar wrote: > >> i've released the -T3 VP patch: > >> > >> http://redhat.com/~mingo/voluntary-preempt/voluntary-preempt-2.6.9-rc3-mm3-T3 > >> > > > > With VP and PREEMPT in general, does the scheduler always run the > > highest priority process, or do we only preempt if a SCHED_FIFO process > > is runnable? > > Always the highest priority runnable. > Hmm, interesting. Would there be any advantage to a mode where only SCHED_FIFO tasks can preempt? This seems like a much lighter way to solve the realtime problem. Lee - 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/