From mboxrd@z Thu Jan 1 00:00:00 1970 From: Guenter Roeck Subject: Re: Crash in -next due to 'MIPS: Move FP usage checks into protected_{save, restore}_fp_context' Date: Mon, 27 Jul 2015 12:44:01 -0700 Message-ID: <20150727194401.GC14674@roeck-us.net> References: <20150715160918.GA27653@roeck-us.net> <20150727150652.GA1756@roeck-us.net> <20150727172142.GE7289@NP-P-BURTON> <20150727174622.GA10708@roeck-us.net> <20150727180442.GG7289@NP-P-BURTON> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from bh-25.webhostbox.net ([208.91.199.152]:54566 "EHLO bh-25.webhostbox.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750917AbbG0ToF (ORCPT ); Mon, 27 Jul 2015 15:44:05 -0400 Content-Disposition: inline In-Reply-To: <20150727180442.GG7289@NP-P-BURTON> Sender: linux-next-owner@vger.kernel.org List-ID: To: Paul Burton Cc: linux-next@vger.kernel.org, Ralf Baechle , linux-kernel@vger.kernel.org, linux-mips@linux-mips.org On Mon, Jul 27, 2015 at 11:04:42AM -0700, Paul Burton wrote: > 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... > Hi Paul, some more data: I tried with mipsel64, using malta_defconfig from 4.2-rc4 as starting point. Same failure. All releases from 3.2 up to 4.2-rc4 pass the test, linux-next as of today fails. Here is the log: http://server.roeck-us.net:8010/builders/qemu-mipsel64-next/builds/0/steps/qemubuildcommand/logs/stdio I pushed the initramfs, configuration, and test script into rootfs/mipsel64 of https://github.com/groeck/linux-build-test. Guenter