From mboxrd@z Thu Jan 1 00:00:00 1970 From: Peter Lieven Subject: Re: qemu-kvm-1.0 crashes with threaded vnc server? Date: Tue, 28 Feb 2012 12:48:39 +0100 Message-ID: <4F4CBF17.9080805@dlh.net> References: <4F340B8A.2020907@dlh.net> <51EF3F40-AC56-4EE9-934F-6F2A2CCD80B6@dlh.net> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Cc: qemu-devel@nongnu.org, kvm@vger.kernel.org, weil@mail.berlios.de, anthony@codemonkey.ws To: Corentin Chary Return-path: Received: from ssl.dlh.net ([91.198.192.8]:41810 "EHLO ssl.dlh.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754385Ab2B1Lsl (ORCPT ); Tue, 28 Feb 2012 06:48:41 -0500 In-Reply-To: Sender: kvm-owner@vger.kernel.org List-ID: On 28.02.2012 09:37, Corentin Chary wrote: > On Mon, Feb 13, 2012 at 10:24 AM, Peter Lieven wrote: >> Am 11.02.2012 um 09:55 schrieb Corentin Chary: >> >>> On Thu, Feb 9, 2012 at 7:08 PM, Peter Lieven wrote: >>>> Hi, >>>> >>>> is anyone aware if there are still problems when enabling the threaded vnc >>>> server? >>>> I saw some VMs crashing when using a qemu-kvm build with >>>> --enable-vnc-thread. >>>> >>>> qemu-kvm-1.0[22646]: segfault at 0 ip 00007fec1ca7ea0b sp 00007fec19d056d0 >>>> error 6 in libz.so.1.2.3.3[7fec1ca75000+16000] >>>> qemu-kvm-1.0[26056]: segfault at 7f06d8d6e010 ip 00007f06e0a30d71 sp >>>> 00007f06df035748 error 6 in libc-2.11.1.so[7f06e09aa000+17a000] >>>> >>>> I had no time to debug further. It seems to happen shortly after migrating, >>>> but thats uncertain. At least the segfault in libz seems to >>>> give a hint to VNC since I cannot image of any other part of qemu-kvm using >>>> libz except for VNC server. >>>> >>>> Thanks, >>>> Peter >>>> >>>> >>> Hi Peter, >>> I found two patches on my git tree that I sent long ago but somehow >>> get lost on the mailing list. I rebased the tree but did not have the >>> time (yet) to test them. >>> http://git.iksaif.net/?p=qemu.git;a=shortlog;h=refs/heads/wip >>> Feel free to try them. If QEMU segfault again, please send a full gdb >>> backtrace / valgrind trace / way to reproduce :). >>> Thanks, >> Hi Corentin, >> >> thanks for rebasing those patches. I remember that I have seen them the >> last time I noticed (about 1 year ago) that the threaded VNC is crashing. >> I'm on vacation this week, but I will test them next week >> and let you know if I can force a crash with them applied. If not we should >> consider to include them asap. > Hi Peter, any news on that ? sorry, i had much trouble debugging nasty slow windows vm problems last 2 weeks. but its still on my list. i'll keep you all posted. peter > > From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([208.118.235.92]:48917) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1S2LY2-0004AT-CY for qemu-devel@nongnu.org; Tue, 28 Feb 2012 06:49:05 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1S2LXu-000447-0Z for qemu-devel@nongnu.org; Tue, 28 Feb 2012 06:48:49 -0500 Received: from ssl.dlh.net ([91.198.192.8]:49426) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1S2LXt-00043L-Qb for qemu-devel@nongnu.org; Tue, 28 Feb 2012 06:48:41 -0500 Message-ID: <4F4CBF17.9080805@dlh.net> Date: Tue, 28 Feb 2012 12:48:39 +0100 From: Peter Lieven MIME-Version: 1.0 References: <4F340B8A.2020907@dlh.net> <51EF3F40-AC56-4EE9-934F-6F2A2CCD80B6@dlh.net> In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] qemu-kvm-1.0 crashes with threaded vnc server? List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Corentin Chary Cc: anthony@codemonkey.ws, weil@mail.berlios.de, qemu-devel@nongnu.org, kvm@vger.kernel.org On 28.02.2012 09:37, Corentin Chary wrote: > On Mon, Feb 13, 2012 at 10:24 AM, Peter Lieven wrote: >> Am 11.02.2012 um 09:55 schrieb Corentin Chary: >> >>> On Thu, Feb 9, 2012 at 7:08 PM, Peter Lieven wrote: >>>> Hi, >>>> >>>> is anyone aware if there are still problems when enabling the threaded vnc >>>> server? >>>> I saw some VMs crashing when using a qemu-kvm build with >>>> --enable-vnc-thread. >>>> >>>> qemu-kvm-1.0[22646]: segfault at 0 ip 00007fec1ca7ea0b sp 00007fec19d056d0 >>>> error 6 in libz.so.1.2.3.3[7fec1ca75000+16000] >>>> qemu-kvm-1.0[26056]: segfault at 7f06d8d6e010 ip 00007f06e0a30d71 sp >>>> 00007f06df035748 error 6 in libc-2.11.1.so[7f06e09aa000+17a000] >>>> >>>> I had no time to debug further. It seems to happen shortly after migrating, >>>> but thats uncertain. At least the segfault in libz seems to >>>> give a hint to VNC since I cannot image of any other part of qemu-kvm using >>>> libz except for VNC server. >>>> >>>> Thanks, >>>> Peter >>>> >>>> >>> Hi Peter, >>> I found two patches on my git tree that I sent long ago but somehow >>> get lost on the mailing list. I rebased the tree but did not have the >>> time (yet) to test them. >>> http://git.iksaif.net/?p=qemu.git;a=shortlog;h=refs/heads/wip >>> Feel free to try them. If QEMU segfault again, please send a full gdb >>> backtrace / valgrind trace / way to reproduce :). >>> Thanks, >> Hi Corentin, >> >> thanks for rebasing those patches. I remember that I have seen them the >> last time I noticed (about 1 year ago) that the threaded VNC is crashing. >> I'm on vacation this week, but I will test them next week >> and let you know if I can force a crash with them applied. If not we should >> consider to include them asap. > Hi Peter, any news on that ? sorry, i had much trouble debugging nasty slow windows vm problems last 2 weeks. but its still on my list. i'll keep you all posted. peter > >