From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932584AbbAHWqR (ORCPT ); Thu, 8 Jan 2015 17:46:17 -0500 Received: from atrey.karlin.mff.cuni.cz ([195.113.26.193]:41557 "EHLO atrey.karlin.mff.cuni.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755151AbbAHWqQ (ORCPT ); Thu, 8 Jan 2015 17:46:16 -0500 Date: Thu, 8 Jan 2015 23:46:14 +0100 From: Pavel Machek To: Russell King - ARM Linux Cc: Catalin Marinas , Vince Weaver , "nicolas.pitre@linaro.org" , Linus Torvalds , Marc Zyngier , kernel list , "vincent.weaver@maine.edu" Subject: Re: [PATCH] Revert 9fc2105aeaaf56b0cf75296a84702d0f9e64437b to fix pyaudio (and probably more) Message-ID: <20150108224614.GA5034@amd> References: <20150107205346.GO12302@n2100.arm.linux.org.uk> <20150108103911.GQ12302@n2100.arm.linux.org.uk> <20150108161908.GA17290@e104818-lin.cambridge.arm.com> <20150108163450.GV12302@n2100.arm.linux.org.uk> <20150108164111.GB17290@e104818-lin.cambridge.arm.com> <20150108165705.GW12302@n2100.arm.linux.org.uk> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20150108165705.GW12302@n2100.arm.linux.org.uk> User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu 2015-01-08 16:57:05, Russell King - ARM Linux wrote: > On Thu, Jan 08, 2015 at 04:41:12PM +0000, Catalin Marinas wrote: > > On Thu, Jan 08, 2015 at 04:34:50PM +0000, Russell King - ARM Linux wrote: > > > On Thu, Jan 08, 2015 at 04:19:08PM +0000, Catalin Marinas wrote: > > > > I really think we should stop this thread. User ABI breakage fixed now. > > > > > > No. Vince's email shows a more serious problem. > > > > > > The ABI breakage issue was reported before the patches were apparently > > > merged, but that information seems to have been lost. We need to > > > understand how that happened so similar instances don't happen in the > > > future. > > > > FYI, searching for "Vince Weaver" and "bogomips" found this: > > > > https://lkml.org/lkml/2013/7/11/454 > > Gah. > > It looks like the report was made by hanging it into a totally different > thread to the patches which caused the problem, and which went nowhere > near the ARM kernel mailing lists. This went at least to Will Deacon and Nicolas Pitre. https://lkml.org/lkml/2013/5/15/217 So AFAICT yes, we knowingly broke at least com.securiteinfo.android.bogomips application. > At least that explains why people like me who really need to know this > stuff were not aware of the issue. > > One thing I still can't get my head around though is... Vince reported > the breakage on 11 July 2013, but the patch is dated 30 August and I > merged it 2 September. So, how did Vince know about it to report the > ABI breakage? Had it been sitting somewhere else? There was discussion on lkml at May 2013, clearly marked "ARM:". I don't see enough headers to know what else was copied. Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html