From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754052AbbG0SEt (ORCPT ); Mon, 27 Jul 2015 14:04:49 -0400 Received: from mailapp01.imgtec.com ([195.59.15.196]:4002 "EHLO mailapp01.imgtec.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752294AbbG0SEr (ORCPT ); Mon, 27 Jul 2015 14:04:47 -0400 Date: Mon, 27 Jul 2015 11:04:42 -0700 From: Paul Burton To: Guenter Roeck CC: , Ralf Baechle , , Subject: Re: Crash in -next due to 'MIPS: Move FP usage checks into protected_{save, restore}_fp_context' Message-ID: <20150727180442.GG7289@NP-P-BURTON> References: <20150715160918.GA27653@roeck-us.net> <20150727150652.GA1756@roeck-us.net> <20150727172142.GE7289@NP-P-BURTON> <20150727174622.GA10708@roeck-us.net> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Disposition: inline In-Reply-To: <20150727174622.GA10708@roeck-us.net> User-Agent: Mutt/1.5.23 (2014-03-12) X-Originating-IP: [10.100.200.213] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Jul 27, 2015 at 10:46:22AM -0700, Guenter Roeck wrote: > On Mon, Jul 27, 2015 at 10:21:42AM -0700, Paul Burton wrote: > > On Mon, Jul 27, 2015 at 08:06:52AM -0700, Guenter Roeck wrote: > > > On Wed, Jul 15, 2015 at 09:09:18AM -0700, Guenter Roeck wrote: > > > > Hi, > > > > > > > > my qemu test for mipsel crashes with next-20150715 as follows. > > > > > > > ping ... problem is still seen as of next-20150727. > > > > Hi Guenter, > > > > Apologies for the delay. Could you share your affected kernel > > configuration & which userland you're running? > > > > I've just tested with a malta_defconfig kernel & a buildroot based > > initramfs without problems, and things are also fine on my physical > > MIPSr6 setups. If you have any directions with which I can reproduce > > this problem that would be great. > > > This is with qemu in little endian mode. Big endian works fine. Yup, I was using little endian in both cases. malta_defconfig is little endian - sadly use of the el suffix is pretty inconsistent... > The configuration, the script to build and run the kernel, > and the root file system used are are available at > https://github.com/groeck/linux-build-test, in directory > rootfs/mipsel/. The log for the latest build failure is in > http://server.roeck-us.net:8010/builders/qemu-mipsel-next/builds/194/steps/qemubuildcommand/logs/stdio. Thanks for the pointers, I'm able to reproduce it using your config and initramfs, and I'll dig into what's going on here. Paul