[Xen-devel] Xen Live Migration Fail

[涂小訓 <iwantplay@xxxxxxxxx>]

Dear all:

      I am trying to migrate a WinXP HVM (64M memory) from a machine
(sender) to another machine (receiver) through AoE disk, however,
there are some errors when do the following command:
(My xen version is xen-4.0.1-rc5.hg, kernel 2.6.31.13, xen xen-4.0.1-rc6-pre,
 Both sender and receiver are the same xen version)

      xm migrate --live domain_id receiver_ip

===============================================
      The error message at sender side is:

Error: timed out
Usage: xm migrate <Domain> <Host>
...
===============================================


     Then, I read the xend.log (sender) and find this error message:

===============================================
[2010-11-20 18:12:45 4667] INFO (XendDomain:1206) Domain
WinXP_HVM_Migrate (1) unpaused.
[2010-11-20 18:14:06 4667] DEBUG (XendCheckpoint:124) [xc_save]:
/usr/lib/xen/bin/xc_save 35 1 0 0 5
[2010-11-20 18:14:06 4667] INFO (XendCheckpoint:423) xc_save: failed
to get the suspend evtchn port
...
[2010-11-20 18:14:33 4667] WARNING (image:552) domain
migrating-WinXP_HVM_Migrate: device model failure: pid 4871: died due
to signal 6; see /var/log/xen/qemu-dm-WinXP_HVM_Migrate.log
[2010-11-20 18:14:33 4667] INFO (XendDomainInfo:2088) Domain has
shutdown: name=migrating-WinXP_HVM_Migrate id=1 reason=suspend.
[2010-11-20 18:14:43 4667] INFO (XendCheckpoint:423) ERROR Internal
error: Suspend request failed
[2010-11-20 18:14:43 4667] INFO (XendCheckpoint:423) ERROR Internal
error: Domain appears not to have suspended
[2010-11-20 18:14:48 4667] INFO (XendCheckpoint:423) xc_save: timed
out waiting for qemu logdirty response.
...
===============================================


       And the qemu-dm.log gives a "buffer overflow" message as following:

===============================================
...
device model saving state
*** buffer overflow detected ***: /usr/lib64/xen/bin/qemu-dm terminated
======= Backtrace: =========
/lib/libc.so.6(__fortify_fail+0x37)[0x7fecab467217]
/lib/libc.so.6(+0xfe0d0)[0x7fecab4660d0]
/lib/libc.so.6(+0xfd539)[0x7fecab465539]
/lib/libc.so.6(_IO_default_xsputn+0xcc)[0x7fecab3ddd1c]
/lib/libc.so.6(_IO_vfprintf+0x14c)[0x7fecab3ad4ec]
===============================================


     The logs are also attached. Any ideas or patches to fix this problem ?
Thanks!

Best Regards,
Tang-Hsun Tu

xend_sender.log
Description: Binary data

xend_receiver.log
Description: Binary data

qemu-dm-WinXP_HVM_Migrate.log
Description: Binary data

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