From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753237AbbG0SRw (ORCPT ); Mon, 27 Jul 2015 14:17:52 -0400 Received: from bh-25.webhostbox.net ([208.91.199.152]:39083 "EHLO bh-25.webhostbox.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750891AbbG0SRu (ORCPT ); Mon, 27 Jul 2015 14:17:50 -0400 Date: Mon, 27 Jul 2015 11:17:47 -0700 From: Guenter Roeck To: Paul Burton Cc: linux-next@vger.kernel.org, Ralf Baechle , linux-kernel@vger.kernel.org, linux-mips@linux-mips.org Subject: Re: Crash in -next due to 'MIPS: Move FP usage checks into protected_{save, restore}_fp_context' Message-ID: <20150727181747.GA20077@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 Content-Disposition: inline In-Reply-To: <20150727180442.GG7289@NP-P-BURTON> User-Agent: Mutt/1.5.23 (2014-03-12) X-Authenticated_sender: guenter@roeck-us.net X-OutGoing-Spam-Status: No, score=-1.0 X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - bh-25.webhostbox.net X-AntiAbuse: Original Domain - vger.kernel.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - roeck-us.net X-Get-Message-Sender-Via: bh-25.webhostbox.net: authenticated_id: guenter@roeck-us.net X-Source: X-Source-Args: X-Source-Dir: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.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... > Interesting. > > 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. > Let me know what you find. Maybe something is wrong with my configuration or initramfs, but it is odd that I didn't see the problem earlier. Unfortunately I don't recall where I got the configuration from. Guess I should keep notes :-(. Thanks, Guenter