Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1030520AbWHUPCQ (ORCPT ); Mon, 21 Aug 2006 11:02:16 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1030468AbWHUPCQ (ORCPT ); Mon, 21 Aug 2006 11:02:16 -0400 Received: from mail.gmx.de ([213.165.64.20]:61338 "HELO mail.gmx.net") by vger.kernel.org with SMTP id S1030520AbWHUPCP (ORCPT ); Mon, 21 Aug 2006 11:02:15 -0400 X-Authenticated: #14349625 Subject: Re: [PATCH 0/7] CPU controller - V1 From: Mike Galbraith To: vatsa@in.ibm.com Cc: Ingo Molnar , Nick Piggin , Sam Vilain , linux-kernel@vger.kernel.org, Kirill Korotaev , Balbir Singh , sekharan@us.ibm.com, Andrew Morton , nagar@watson.ibm.com, matthltc@us.ibm.com, dipankar@in.ibm.com In-Reply-To: <20060821124830.GB14291@in.ibm.com> References: <20060820174015.GA13917@in.ibm.com> <1156156960.7772.38.camel@Homer.simpson.net> <20060821124830.GB14291@in.ibm.com> Content-Type: text/plain Date: Mon, 21 Aug 2006 17:10:41 +0000 Message-Id: <1156180241.6582.69.camel@Homer.simpson.net> Mime-Version: 1.0 X-Mailer: Evolution 2.6.0 Content-Transfer-Encoding: 7bit X-Y-GMX-Trusted: 0 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 863 Lines: 20 On Mon, 2006-08-21 at 18:18 +0530, Srivatsa Vaddagiri wrote: > On Mon, Aug 21, 2006 at 10:42:40AM +0000, Mike Galbraith wrote: > > WRT interactivity: Looking at try_to_wake_up(), it appears that wake-up > > of a high priority group-a task will not result in preemption of a lower > > priority current group-b task. True? > > I dont think it is true. The definition of TASK_PREEMPTS_CURR() is > unchanged with these patches. I must be missing something. If current and awakening tasks have separate runqueues, task_rq(awakening)->curr != current. We won't look at current->prio, so won't resched(current). -Mike - 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/