[Xen-users] Problem migrating domains

["Pierre Petliczew" <Pierre.Petliczew@xxxxxx>]

Hello list !

I got a problem concerning migration of domUs.

After starting migration with 'xm migrate domdirectinstall xxx.xxx.xxx.xxx' 
domU appears at xm top as 'migrating-domdirectinstall' (Source) and as 
'domdirectinstall' (Target).

But then nothing happens. It seems that the command hangs up. So logging up on 
the consol with 'xm console migrating-domdirectinstall' (Host) I got the 
following output on the console.

talaos:~ # xm console migrating-domdirectinstall
Setting mem allocation to 131072 kiB
------------[ cut here ]------------
kernel BUG at include/asm/mach-xen/asm/maddr.h:34!
invalid opcode: 0000 [#1]
SMP
last sysfs file: /devices/xen/vif-0/net/eth0/type
Modules linked in: iptable_filter ip_tables ip6table_filter ip6_tables x_tables 
                                                                             
ipv6 nfs lockd nfs_acl sunrpc dm_rdac scsi_mod dm_hp_sw dm_emc dm_multipath 
af_p                                                                            
 acket dm_snapshot dm_mod xenblk xennet
CPU:    0
EIP:    0061:[<c01107d9>]    Tainted: G      N VLI
EFLAGS: 00010006   (2.6.22.17-0.1-xen #1)
EIP is at pgd_walk+0xe1/0x19a
eax: 00055555   ebx: 55555000   ecx: 55555061   edx: 00008800
esi: 00000001   edi: c1613000   ebp: c1613000   esp: c17e7f4c
ds: 007b   es: 007b   fs: 00d8  gs: 0000  ss: 0069
Process suspend (pid: 1641, ti=c17e6000 task=c6aa4030 task.ti=c17e6000)
Stack: 00000000 00000000 00000061 01613000 00000001 00000000 00000000 c0110a56
       c1c46260 c011120b c17e7fc4 c022a646 c022a97e c6aa4030 6332edf5 00000032
       00000000 c6aa4154 c1bee880 00000000 c0395e40 c6a87f4c 00000003 00000001
Call Trace:
 [<c0110a56>] __pgd_pin+0x17/0x36
 [<c011120b>] mm_pin_all+0x32/0x4a
 [<c022a646>] xen_suspend+0x0/0x30
 [<c022a97e>] take_machine_down+0x7e/0x382
 [<c022a646>] xen_suspend+0x0/0x30
 [<c022ad0d>] __xen_suspend+0x8b/0xba
 [<c022a653>] xen_suspend+0xd/0x30
 [<c012be42>] kthread+0x38/0x5e
 [<c012be0a>] kthread+0x0/0x5e
 [<c0104b43>] kernel_thread_helper+0x7/0x10
 =======================
Code: 24 08 c1 fb 05 c1 e3 0c 09 d9 f6 c1 01 74 3b 89 c8 c1 e8 0c 80 3d 5a 3b 
36                                                                              
c0 00 75 22 8b 15 80 57 3f c0 85 d2 74 08 39 d0 72 04 <0f> 0b eb fe c1 e0 02 03 
                                                                             05 
a4 86 39 c0 8b 00 25 ff ff ff 7f c1
EIP: [<c01107d9>] pgd_walk+0xe1/0x19a SS:ESP 0069:c17e7f4c


Host is a P4 and target is pretty old Athlon at 1GHz, but architecture should 
be the same (x86) or am I wrong at that point.

-Pierre


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