Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755878Ab0LTKuD (ORCPT ); Mon, 20 Dec 2010 05:50:03 -0500 Received: from mx1.redhat.com ([209.132.183.28]:27541 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754424Ab0LTKt7 (ORCPT ); Mon, 20 Dec 2010 05:49:59 -0500 Message-ID: <4D0F34C0.9000400@redhat.com> Date: Mon, 20 Dec 2010 12:49:36 +0200 From: Avi Kivity User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.13) Gecko/20101209 Fedora/3.1.7-0.35.b3pre.fc14 Lightning/1.0b3pre Thunderbird/3.1.7 MIME-Version: 1.0 To: Mike Galbraith CC: Rik van Riel , kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Srivatsa Vaddagiri , Peter Zijlstra , Chris Wright Subject: Re: [RFC -v2 PATCH 2/3] sched: add yield_to function References: <20101213224434.7495edb2@annuminas.surriel.com> <20101213224657.7e141746@annuminas.surriel.com> <1292306896.7448.157.camel@marge.simson.net> <4D0A6D34.6070806@redhat.com> <1292569018.7772.75.camel@marge.simson.net> <4D0B7D24.5060207@redhat.com> <1292615509.7381.81.camel@marge.simson.net> <4D0CE937.8090601@redhat.com> <1292699204.1181.51.camel@marge.simson.net> <4D0DA45A.9070600@redhat.com> <1292753156.16367.104.camel@marge.simson.net> <4D0DCE10.7000200@redhat.com> <1292834372.8948.27.camel@marge.simson.net> <4D0F1794.3010803@redhat.com> <1292835302.8948.35.camel@marge.simson.net> <4D0F1BD8.20601@redhat.com> <1292837440.8948.60.camel@marge.simson.net> <4D0F25E8.80305@redhat.com> <1292841193.11946.36.camel@marge.simson.net> <4D0F3266.90908@redhat.com> <1292842010.11946.39.camel@marge.simson.net> In-Reply-To: <1292842010.11946.39.camel@marge.simson.net> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 973 Lines: 30 On 12/20/2010 12:46 PM, Mike Galbraith wrote: > > > > However, if I'm all alone on my cpu, and the other task is runnable but > > not running, behind some unrelated task, then I do need that task to be > > preempted (or to move tasks around). > > So in that case, a pull may be advantageous. Yes. > > > Would a kick/hint option be useful? > > > > Depends on what it does... > > Let you decide whether you only want to drop a hint and leave it at > that, or also attempt a preemption. Who is "you" in this? the scheduler? I'm fine with hints so long as they are usually acted upon (if it isn't, I'll go back to the guest, spin a bit more, and retry). -- error compiling committee.c: too many arguments to function -- 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/