Re: [Qemu-devel] Qemu 2.0 regression with xen: qemu crash on any domUs S.O. start

[Laszlo Ersek <lersek@redhat.com>]

On 04/01/14 17:01, Fabio Fantoni wrote:
> Today I tried latest qemu 2.0 compiled from git (commit
> 63678e17cf399ff81b93417fe7bee8d6ef6b6b1b) on this dom0:
> Debian 7 (Wheezy) 64 bit with kernel from package
> linux-image-3.2.0-4-amd64 version 3.2.54-2 and all dependency packages
> for xen, spice and usb redirection.
> Seabios 1.7.3-3, spice 0.12.4-0nocelt2 and usbredir 0.6-2 compiled from
> debian unstable sources.
> The xen-unstable upstream commit is
> 4787f667bcee205c56a27da59b766a53e1e929eb, plus these patches not upstream:
> tools: various things just to build test
> tools: Improve make debball
> libxl: Add qxl vga interface support for upstream qemu
> libxl: add basic spice support for pv domUs
> 
> Qemu crashes always on domU S.O. start, on both pv and hvm domUs.
> 
> Same dom0 with qemu 1.6 from xen-unstable repository used for some tests
> yesterday and was full working.
> I also update seabios to 1.7.4-4 compiled from debian unstable sources
> but the problem persists.
> 
> I looked on dom0 logs, qemu logs and xl dmesg and I found only a qemu
> segfault related on each domU in dom0 syslog, for example the latest:
> [  844.273170] qemu-system-i38[3545]: segfault at 8 ip 00007fa905dcc4c1
> sp 00007fff41220810 error 4 in qemu-system-i386[7fa905ad5000+598000]
> 
> If you need more informations, tests and/or logs tell me and I'll post
> them.

Whoever looks into this would be greatly helped:
- if you bisected the issue (between 1.6 and 2.0-rcX),
- if you posted qemu's backtrace at the sigsegv.

Laszlo