From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753946Ab0EORcR (ORCPT ); Sat, 15 May 2010 13:32:17 -0400 Received: from cantor.suse.de ([195.135.220.2]:34858 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751882Ab0EORcP (ORCPT ); Sat, 15 May 2010 13:32:15 -0400 Subject: Re: commit e9e9250b: sync wakeup bustage when waker is an RT task From: Mike Galbraith To: Peter Zijlstra Cc: Ingo Molnar , LKML In-Reply-To: <1273943222.8752.7.camel@marge.simson.net> References: <1273924628.10630.24.camel@marge.simson.net> <1273925052.1674.138.camel@laptop> <1273943222.8752.7.camel@marge.simson.net> Content-Type: text/plain Date: Sat, 15 May 2010 19:32:12 +0200 Message-Id: <1273944732.7807.6.camel@marge.simson.net> Mime-Version: 1.0 X-Mailer: Evolution 2.24.1.1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sat, 2010-05-15 at 19:07 +0200, Mike Galbraith wrote: > On Sat, 2010-05-15 at 14:04 +0200, Peter Zijlstra wrote: > > So basically make all RT wakeups sync? > > I was going to just skip subtracting waker's weight ala > > /* > * If sync wakeup then subtract the (maximum possible) > * effect of the currently running task from the load > * of the current CPU: > */ > if (sync && !task_has_rt_policy(curr)) > ... (not. hohum, something to piddle with over java manana)