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



Il 02/04/2014 18:05, Anthony PERARD ha scritto:
On Tue, Apr 01, 2014 at 05:01:18PM +0200, 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
Have you try without your last two patches? Or even any patch at all?

I did some thing with same build and qemu 1.6 the day before and all was working, the problem start with change of qemu with 2.0.
I also tried disabling all things of my patches.


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.
What is in your guest config files?


The cfg of test with full backtrace on other my mail:
name='wheezy'
memory=1024
vcpus=2
device_model_override="/usr/lib/xen/bin/qemu-gdb"
disk=['/mnt/vm/disks/wheezy.disk1.xm,raw,xvda,rw']
vif=['bridge=xenbr0']
vfb=['vnc=1,vncunused=1,vnclisten=0.0.0.0,keymap=it']
#vfb=['vnc=0']
#vnc=0
#vncunused=1
#keymap="it"
#vnclisten=0.0.0.0
#spice=1
#spicehost="0.0.0.0"
#spiceport=6002
#spicepasswd="test"
#bootloader='pygrub'
# Only for installation
#kernel = "/boot/domu/wheezy/vmlinuz"
kernel = "/mnt/vm/pvgrub2/grub/pvgrub2.xen"
#ramdisk = "/boot/domu/wheezy/initrd.gz"
#extra = "debian-installer/exit/always_halt=true -- quiet console=tty0"


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