From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756001AbYIEJTe (ORCPT ); Fri, 5 Sep 2008 05:19:34 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753138AbYIEJTZ (ORCPT ); Fri, 5 Sep 2008 05:19:25 -0400 Received: from ns1.q-leap.de ([153.94.51.193]:33680 "EHLO mail.q-leap.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753429AbYIEJTY (ORCPT ); Fri, 5 Sep 2008 05:19:24 -0400 From: Bernd Schubert To: Arjan van de Ven Subject: Re: frame unwinder patches Date: Fri, 5 Sep 2008 11:19:21 +0200 User-Agent: KMail/1.9.9 Cc: linux-kernel@vger.kernel.org References: <20080904102936.28e10c39@infradead.org> In-Reply-To: <20080904102936.28e10c39@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200809051119.21699.bs@q-leap.de> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thursday 04 September 2008 19:29:36 Arjan van de Ven wrote: > On Thu, 04 Sep 2008 18:46:52 +0200 > > Bernd Schubert wrote: > > Hello, > > > > up to 2.6.22 the -mm series had these nice frame unwinder patches, > > which gave beautiful stack traces. Unfortunately these frame unwinder > > patches seem to have been dropped :( > > > > Anyone still maintaining updated patches? > > > > Probably all the "?" lines shouldn't be printed. > > printing the ? lines is the result of a compromise between getting the > most reliable information out of a stack trace, and getting a useful > data for the case where not everything is going as well as it should. > > not printing the ? would be trivial (for some backtraces we do that), > but so far hasn't been seen as desirable because you lose information > in those hard-to-debug cases when you need anything you can get from > the backtrace. I see your point, but in most cases it is rather annoying. Bernd -- Bernd Schubert Q-Leap Networks GmbH