On 08/17/2009 08:15 PM, Stephane Bakhos wrote:
since upgrade from qemu-kvm 0.10.5 to 0.10.6 (Debian Lenny,
Packages from
http://www.corpit.ru/debian/tls/kvm/, kvm module from kernel 2.6.30)
live-migration does not work anymore.
After "migrate -d tcp:192.168.0.2:4444" info says "migration
completed",
but "incoming" kvm machine dies.
Any hint how to debug this?
What do you mean exactly by "dies"?
Not sure if this is related but this is what happens on my system when
I try to do a live migration with kvm-88 and the latest kernel 2.6.30
(gentoo 2.6.30-gentoo-r5).
[ 73.168871] general protection fault: 0000 [#1] SMP
[ 73.169409] last sysfs file: /sys/kernel/uevent_seqnum
[ 73.169733] Modules linked in:
[ 73.169733]
[ 73.169733] Pid: 1, comm: init Not tainted (2.6.30-gentoo-r5 #1)
[ 73.169733] EIP: 0060:[<c0102f01>] EFLAGS: 00010246 CPU: 0
[ 73.169733] EIP is at sysenter_exit+0xf/0x16
[ 73.169733] EAX: 00000000 EBX: 0000000b ECX: bfbc2a80 EDX: b7f90424
[ 73.169733] ESI: 00000000 EDI: bfbc2d74 EBP: 00000000 ESP: df82bfb4
[ 73.169733] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 0068
[ 73.169733] Process init (pid: 1, ti=df82a000 task=df830000
task.ti=df82a000)
[ 73.169733] Stack:
[ 73.169733] 0000000b bfbc2c44 00000000 00000000 bfbc2d74 bfbc2d88
00000000 0000007b
[ 73.169733] 0000007b 00000000 00000000 0000008e b7f90424 00000073
00000246 bfbc2a80
[ 73.169733] 0000007b 00000000 00000000
[ 73.169733] Call Trace:
[ 73.169733] Code: 42 c0 89 44 24 18 fa 8d 80 00 00 00 00 8b 4d 08
f7 c1 ff fe 00 08 0f 85 56 01 00 00 8b 54 24 30 8b 4c 24 3c 31 ed 8e
64 24 24 fb <0f> 35 8d 44 20 00 90 50 fc 6a 00 0f a0 06 1e 50 55 57 56
52 51
This is the sysexit instruction.
Are you doing cross-vendor migration (AMD->Intel or vice versa)?
This is supported in kvm-88, but not in previous versions. Are you sure
the kvm-88 modules are loaded on the target host, and not the modules
that came with the kernel?
Try 'cat /sys/module/kvm/version'.
--
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.
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