Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759325AbXKBBUo (ORCPT ); Thu, 1 Nov 2007 21:20:44 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753621AbXKBBUh (ORCPT ); Thu, 1 Nov 2007 21:20:37 -0400 Received: from smtp2.linux-foundation.org ([207.189.120.14]:59127 "EHLO smtp2.linux-foundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753522AbXKBBUg (ORCPT ); Thu, 1 Nov 2007 21:20:36 -0400 Date: Thu, 1 Nov 2007 18:19:41 -0700 (PDT) From: Linus Torvalds To: Rik van Riel cc: Gregory Haskins , Nick Piggin , Linux Kernel Mailing List , Andi Kleen , Ingo Molnar Subject: Re: [patch 1/4] x86: FIFO ticket spinlocks In-Reply-To: <20071101203526.293cd7f0@bree.surriel.com> Message-ID: References: <20071101140146.GA26879@wotan.suse.de> <20071101140320.GC26879@wotan.suse.de> <4729E567.1050402@gmail.com> <20071101203526.293cd7f0@bree.surriel.com> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=us-ascii Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 702 Lines: 18 On Thu, 1 Nov 2007, Rik van Riel wrote: > > Larry Woodman managed to wedge the VM into a state where, on his > 4x dual core system, only 2 cores (on the same CPU) could get the > zone->lru_lock overnight. The other 6 cores on the system were > just spinning, without being able to get the lock. .. and this is almost always the result of a locking *bug*, not unfairness per se. IOW, unfairness just ends up showing the bug in the first place. 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/