Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752062Ab2FLK1X (ORCPT ); Tue, 12 Jun 2012 06:27:23 -0400 Received: from casper.infradead.org ([85.118.1.10]:38506 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751952Ab2FLK1V convert rfc822-to-8bit (ORCPT ); Tue, 12 Jun 2012 06:27:21 -0400 Message-ID: <1339496836.31548.68.camel@twins> Subject: Re: Kernel panic - not syncing: Attempted to kill the idle task! From: Peter Zijlstra To: Linus Torvalds Cc: hi3766691@gmail.com, Hillf Danton , LKML , Andrea Arcangeli , Zhouping Liu Date: Tue, 12 Jun 2012 12:27:16 +0200 In-Reply-To: References: <1339421268.30462.15.camel@twins> <4FD6BD72.2070808@redhat.com> <1339490988.31548.40.camel@twins> Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7BIT X-Mailer: Evolution 3.2.2- Mime-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 833 Lines: 21 On Tue, 2012-06-12 at 13:20 +0300, Linus Torvalds wrote: > Peter, you are very fundamentally wrong if you think the distance > array has to be symmetric. That is fundamentally not true for many > typologies. > > The trivial example of a non symmetric case is just a simple > unidirectional ring. The distance from n to n+1 is just one, but the > distance from n+1 to n is n-1 hops. > > So don't try to say that distances have to be symmetric. That's just > garbage. Sure, I realize this, but the 17,18 thing isn't a ring. It looks like something that should be symmetric but isn't. -- 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/