From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753258AbYHLDf0 (ORCPT ); Mon, 11 Aug 2008 23:35:26 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751433AbYHLDfP (ORCPT ); Mon, 11 Aug 2008 23:35:15 -0400 Received: from ishtar.tlinx.org ([64.81.245.74]:48868 "EHLO ishtar.tlinx.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751302AbYHLDfO (ORCPT ); Mon, 11 Aug 2008 23:35:14 -0400 Message-ID: <48A104EB.6040509@tlinx.org> Date: Mon, 11 Aug 2008 20:35:07 -0700 From: Linda Walsh User-Agent: Thunderbird 2.0.0.16 (Windows/20080708) MIME-Version: 1.0 To: Eric Sandeen CC: LKML , xfs-oss Subject: Re: Lock debugging noise or real problem? References: <48A093A7.40606@tlinx.org> <48A09CA9.9080705@sandeen.net> <48A0F686.2090700@tlinx.org> <48A0F9FC.1070805@sandeen.net> In-Reply-To: <48A0F9FC.1070805@sandeen.net> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Eric Sandeen wrote: > I haven't looked closely at #2 but there have been so many lockdep > reports for xfs, and so many explanations of why they don't always get > along, you'll probably be able to find something with some searching. > ---- So in debugging mysterious 'lockups' where I've, at least once, noticed a hangcheck_timer elapse, this lock-checking stuff is just nonsensical? It is very frustrating trying to turn on debug tools in the kernel and get so many false positives. Would it be possible or, perhaps, desirable to eliminate the buggy lock-checks in the xfs code? Meanwhile...back to finding reasons for the semi-random, periodic hanging... ;^/