Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751361AbaBHD5y (ORCPT ); Fri, 7 Feb 2014 22:57:54 -0500 Received: from mail-bk0-f52.google.com ([209.85.214.52]:48904 "EHLO mail-bk0-f52.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751051AbaBHD5x (ORCPT ); Fri, 7 Feb 2014 22:57:53 -0500 MIME-Version: 1.0 In-Reply-To: <52F5A6EE.7020000@roeck-us.net> References: <52F5A6EE.7020000@roeck-us.net> Date: Sat, 8 Feb 2014 11:57:52 +0800 Message-ID: Subject: Re: Commit 597ce1723 (MIPS: Support for 64-bit FP with O32 binaries) causing qemu hang with mips64 kernels From: Huacai Chen To: Guenter Roeck Cc: Linux MIPS Mailing List , Paul Burton , Ralf Baechle , "linux-kernel@vger.kernel.org" Content-Type: text/plain; charset=ISO-8859-1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, Maybe you can try this: http://patchwork.linux-mips.org/patch/6506/ http://patchwork.linux-mips.org/patch/6507/ On Sat, Feb 8, 2014 at 11:39 AM, Guenter Roeck wrote: > > Hi all, > > in 3.14-rc1, my mips64 qemu test fails. The image boots and then hangs. > Bisect points to commit 597ce1723 (MIPS: Support for 64-bit FP with O32 > binaries). > Reverting this commit fixes the problem. Disabling MIPS_O32_FP64_SUPPORT > in my test image does _not_ solve the problem. The qemu version does not > seem > to make a difference; I tested with qemu 1.6.0 and 1.7.0. > > Console log output is available in > http://server.roeck-us.net:8010/builders/qemu-mips64-master/builds/34/steps/buildcommand/logs/stdio > > When the problem is seen, the emulation hangs as can be seen in the log, > and the qemu process consumes 100% CPU until it is killed. > > qemu command line is > > qemu-system-mips64 -kernel vmlinux -M malta -hda > core-image-minimal-qemumips64.ext3 \ > -vga cirrus -usb -usbdevice wacom-tablet -no-reboot -m 128 --append > "root=/dev/hda \ > rw mem=128M console=ttyS0 console=tty" -nographic > > The same configuration works fine with earlier kernels. I'll be happy to > provide > the detailed configuration as well as the root file system for testing if > needed. > > Obviously I have no idea if this is a problem with the patch or with qemu. > If there is anything I can do to help tracking down the problem further, > please let me know. > > Thanks, > Guenter > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/