Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752843AbaFGDKw (ORCPT ); Fri, 6 Jun 2014 23:10:52 -0400 Received: from terminus.zytor.com ([198.137.202.10]:40800 "EHLO mail.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752687AbaFGDKv convert rfc822-to-8bit (ORCPT ); Fri, 6 Jun 2014 23:10:51 -0400 Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (1.0) Subject: Re: [PATCH] x86/dumpstack: Walk frames when built with frame pointers From: "H. Peter Anvin" X-Mailer: iPad Mail (11D201) In-Reply-To: <20140606082420.GA28241@nazgul.tnic> Date: Fri, 6 Jun 2014 20:09:46 -0700 Cc: Peter Zijlstra , Ingo Molnar , Frederic Weisbecker , Richard Yao , Thomas Gleixner , Ingo Molnar , "x86@kernel.org" , Andrew Morton , Tejun Heo , Vineet Gupta , Jesper Nilsson , Jiri Slaby , "linux-kernel@vger.kernel.org" , "kernel@gentoo.org" , Brian Behlendorf , Linus Torvalds , Arnaldo Carvalho de Melo , Jiri Olsa Content-Transfer-Encoding: 8BIT Message-Id: <6385EF0C-1551-4D38-8F00-94258CA5AF4C@zytor.com> References: <1398535818-14217-1-git-send-email-ryao@gentoo.org> <20140427120820.GC22116@gmail.com> <20140430215606.GD17745@localhost.localdomain> <20140507164014.GB16034@gmail.com> <20140606081726.GT6758@twins.programming.kicks-ass.net> <20140606082420.GA28241@nazgul.tnic> To: Borislav Petkov Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The USB debug port is nice once you get it to work. Assumes they haven't done anything clever like hide the special port behind a hub... Sent from my tablet, pardon any formatting problems. > On Jun 6, 2014, at 1:24, Borislav Petkov wrote: > >> On Fri, Jun 06, 2014 at 10:17:26AM +0200, Peter Zijlstra wrote: >> Hopefully the EFI pstore thing will work out, but I've already heard >> that can wear out very quickly and render your machine a brick :-( > > And not only that - write speed is awfully low. I hear you might be ok > to record an oops or so. Continuous debug output, not so much. > >> Me, I simply refuse to work on machines if they don't have a serial >> line, but in general that's not a tenable position I suppose :/ > > Well, with all the other crap they put in modern machines, how hard it > is to put a goddam stupid serial line out everywhere...? WTF do I need a > goddam adaptive keyboard and other idiotic bling-bling if I can't have a > simple serial line for debugging... Blergh. -- 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/