Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755984Ab3CQCuG (ORCPT ); Sat, 16 Mar 2013 22:50:06 -0400 Received: from prod-mail-xrelay02.akamai.com ([72.246.2.14]:57051 "EHLO prod-mail-xrelay02.akamai.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753934Ab3CQCuD (ORCPT ); Sat, 16 Mar 2013 22:50:03 -0400 X-Greylist: delayed 434 seconds by postgrey-1.27 at vger.kernel.org; Sat, 16 Mar 2013 22:50:03 EDT Message-ID: <51452DA6.5050302@akamai.com> Date: Sat, 16 Mar 2013 22:42:46 -0400 From: Jason Baron User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130308 Thunderbird/17.0.4 MIME-Version: 1.0 To: Andrew Cooks CC: Jim Cromie , open list Subject: Re: Bug involving dynamic_debug and '-p' modifier References: In-Reply-To: Content-Type: text/plain; charset=GB2312 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1994 Lines: 55 Hi Andrew, Thanks for the bug report. I need to send a patch to update the maintainers file... Haven't had a chance to look into this yet. Will get back to you. Thanks, -Jason On 03/11/2013 10:28 PM, Andrew Cooks wrote: > On Tue, Mar 12, 2013 at 9:14 AM, Andrew Cooks wrote: >> Hi Jason >> >> When I specify a '-p' modifier in the dynamic debug options in the >> kernel command line, I get a kernel panic during boot. The panic >> happens after userspace starts doing graphical stuff, but I haven't >> been able to pinpoint exactly what. >> >> If I use '=_' instead of '-p', or boot to a recovery mode, or change >> the modifier after booting using debugfs, the panic doesn't occur. For >> example, booting to runlevel 3 with '=_', then flipping the same >> modifier to first to '+p' and then to '-p', before starting X does not >> result in a panic. >> >> Booting to runlevel 3 (or even 1!), with '-p' results in a panic, but >> 'rdshell' is OK. >> >> I also tried the Red Hat kernel (just because it's installed - I >> haven't figured out how to tell the package manager that I don't want >> a kernel). This also panics, but it says that '-p' is not supported. >> >> Please let me know if you need me to do any other tests. >> >> '-p', panic: http://pastebin.com/8yAcBQdY >> '-p', rdshell, no panic: http://pastebin.com/Hi2a7BZA >> >> -- >> a. > Jason's mail bounced, so redirecting to Jim Cromie, who made the most > recent significant changes to dynamic_debug... > -- > 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/ -- 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/