From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752138AbdFUVeS (ORCPT ); Wed, 21 Jun 2017 17:34:18 -0400 Received: from zeniv.linux.org.uk ([195.92.253.2]:57350 "EHLO ZenIV.linux.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751789AbdFUVeR (ORCPT ); Wed, 21 Jun 2017 17:34:17 -0400 Date: Wed, 21 Jun 2017 22:34:16 +0100 From: Al Viro To: Larry Finger Cc: LKML , Thorsten Leemhuis Subject: Re: Regression in kernel 4.12-rc1 for Powerpc 32 - bisected to commit 3448890c32c3 Message-ID: <20170621213415.GO10672@ZenIV.linux.org.uk> References: <69187aa4-611f-b08a-8d14-b8fa47b4c464@lwfinger.net> <1588557c-2706-0c0e-3387-4ae65d0b5790@lwfinger.net> <20170621212257.GN10672@ZenIV.linux.org.uk> <5f4b9fa4-262a-31b1-32ba-a2f6e789b3d6@lwfinger.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <5f4b9fa4-262a-31b1-32ba-a2f6e789b3d6@lwfinger.net> User-Agent: Mutt/1.8.0 (2017-02-23) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Jun 21, 2017 at 04:31:40PM -0500, Larry Finger wrote: > On 06/21/2017 04:22 PM, Al Viro wrote: > > On Wed, Jun 21, 2017 at 10:10:57AM -0500, Larry Finger wrote: > > > > > I finally finished the bisection by patching each commit that was affected > > > by the bootstrap crash. The faulty change is commit > > > 3448890c32c32c482c3ec20baa8fdd2ab4f94cc0 ("powerpc: get rid of zeroing, > > > switch to RAW_COPY_USER"). I am very confident in the bisection. > > > > > > As I know nothing of assembly for ppc32, I have not been able to attempt to > > > find the problem with these patches. > > > > How about the .config that works on parent of that commit? > > Attached. OK... am I right assuming straight jessie/powerpc userland?