From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754209AbbE1MHN (ORCPT ); Thu, 28 May 2015 08:07:13 -0400 Received: from bombadil.infradead.org ([198.137.202.9]:56665 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753185AbbE1MHB (ORCPT ); Thu, 28 May 2015 08:07:01 -0400 Date: Thu, 28 May 2015 14:06:51 +0200 From: Peter Zijlstra To: Mike Galbraith Cc: LKML , Ingo Molnar , ktkhai@parallels.com Subject: Re: sched_setscheduler() vs idle_balance() race Message-ID: <20150528120651.GH3644@twins.programming.kicks-ass.net> References: <1432799032.3237.119.camel@gmail.com> <20150528115118.GG3644@twins.programming.kicks-ass.net> <1432814661.3237.153.camel@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1432814661.3237.153.camel@gmail.com> User-Agent: Mutt/1.5.21 (2012-12-30) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, May 28, 2015 at 02:04:21PM +0200, Mike Galbraith wrote: > On Thu, 2015-05-28 at 13:51 +0200, Peter Zijlstra wrote: > > Which is exactly the hole you mean, right? > > Yeah, but that hole is way older than dl. Box falling into it is > running SLE11, which is.. well, still somewhat resembles 3.0. Oh sure, that patch just recognised there was a hole there and put a comment in. We further failed to spot the fail you just did. Right mess though, I think I already found some of those 'obvious' reasons mentioned in the previous email.