From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751298Ab2LTHIJ (ORCPT ); Thu, 20 Dec 2012 02:08:09 -0500 Received: from wolverine01.qualcomm.com ([199.106.114.254]:46296 "EHLO wolverine01.qualcomm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750934Ab2LTHH7 (ORCPT ); Thu, 20 Dec 2012 02:07:59 -0500 X-IronPort-AV: E=Sophos;i="4.84,322,1355126400"; d="scan'208";a="15390898" Message-ID: <50D2B94D.10309@codeaurora.org> Date: Wed, 19 Dec 2012 23:07:57 -0800 From: Stephen Boyd User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:17.0) Gecko/17.0 Thunderbird/17.0 MIME-Version: 1.0 To: "Bedia, Vaibhav" CC: Paul Walmsley , "linux-omap@vger.kernel.org" , Linux Kernel Mailing List , "linux-arm-kernel@lists.infradead.org" , "Eric W. Biederman" Subject: Re: BUG: spinlock bad magic on CPU#0 on BeagleBone References: <50D2224E.4060300@codeaurora.org> <50D2AF54.7050402@codeaurora.org> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 12/19/2012 10:44 PM, Bedia, Vaibhav wrote: > On Thu, Dec 20, 2012 at 11:55:24, Stephen Boyd wrote: >> On 12/19/2012 8:48 PM, Bedia, Vaibhav wrote: >>> I tried out 3 variants of AM335x boards - 2 of these (BeagleBone and EVM) have DDR2 >>> and 1 has DDR3 (EVM-SK). The BUG is triggered on all of these at the same point. >>> >>> With Stephen's change I don't see this on any of the board variants :) >>> New bootlog below. >> Great! Can I have your Tested-by then? I'll wrap it up into a patch. Is >> this is a new regression? From a glance at the code it looks to have >> existed for quite a while now. > I went back to a branch based off 3.7-rc4 and don't see the issue there. Not sure > what is triggering this now. > > Tested-by: Vaibhav Bedia Thanks. I was thrown off by the author date of this patch which introduced your problem commit 8823c079ba7136dc1948d6f6dcb5f8022bde438e Author: Eric W. Biederman AuthorDate: Sun Mar 7 18:49:36 2010 -0800 Commit: Eric W. Biederman CommitDate: Mon Nov 19 05:59:18 2012 -0800 vfs: Add setns support for the mount namespace It seems to have a 2 year gap between commit date and author date. Either way, it looks to be isolated to the 3.8 merge window but affects quite a few architectures. Patch to follow shortly. -- Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation