Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755853AbYGLXF0 (ORCPT ); Sat, 12 Jul 2008 19:05:26 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752859AbYGLXFS (ORCPT ); Sat, 12 Jul 2008 19:05:18 -0400 Received: from smtp1.linux-foundation.org ([140.211.169.13]:60876 "EHLO smtp1.linux-foundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752417AbYGLXFQ (ORCPT ); Sat, 12 Jul 2008 19:05:16 -0400 Date: Sat, 12 Jul 2008 16:04:38 -0700 (PDT) From: Linus Torvalds To: Vegard Nossum cc: Dmitry Adamushko , Paul Menage , Max Krasnyansky , Paul Jackson , Peter Zijlstra , miaox@cn.fujitsu.com, rostedt@goodmis.org, Thomas Gleixner , Ingo Molnar , Linux Kernel Subject: Re: current linux-2.6.git: cpusets completely broken In-Reply-To: <19f34abd0807121600l653e28bfwb5cce2d880b7f2cd@mail.gmail.com> Message-ID: References: <20080712031736.GA3040@damson.getinternet.no> <19f34abd0807121600l653e28bfwb5cce2d880b7f2cd@mail.gmail.com> User-Agent: Alpine 1.10 (LFD 962 2008-03-14) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 857 Lines: 22 On Sun, 13 Jul 2008, Vegard Nossum wrote: > > (A little pet horse for the occasion: Testing can show the presence of > errors, but not their absence. But that's a different story.) Absolutely. Which is actually why I prefer my patch. I think it fixes - in general - the issue of CPU migration migrating tasks back to the CPU that we're taking down. The other patches seem to work around just the problem that _triggers_ the bug. They don't actually make it impossible to migrate to a CPU that is getting shut down - they just try to avoid the particular sequence that made it happen for you. Linus -- 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/