Xen 3.1 - migration fail / save/restore of PV guests too

["Sébastien Riccio" <sr@swisscenter.com>]

Hi,

I'm currently playing with Xen 3.1 live migration and save/restore features.
I tried to migrate and save/restore a 32p domain on a 64 host and both 
fails.

When I attemp to "xm save centos5 centos.save" xend.log reports this:
(I guess if xm save doesn't work, (live) migrations won't either).

[2007-05-26 17:20:03 3206] DEBUG (XendCheckpoint:88) [xc_save]: 
/usr/lib64/xen/bin/xc_save 22 3 0 0 0
[2007-05-26 17:20:03 3206] DEBUG (XendDomainInfo:824) Storing domain 
details: {'console/ring-ref': '254742', 'image/en
try': '3222274048', 'console/port': '2', 'store/ring-ref': '254743', 
'image/loader': 'generic', 'vm': '/vm/06ed00fe-11
62-4fc4-b5d8-11993ee4a8b9', 
'control/platform-feature-multiprocessor-suspend': '1', 
'image/hv-start-low': '4118806528'
, 'image/guest-os': 'linux', 
'image/features/writable-descriptor-tables': '1', 'image/virt-base': 
'3221225472', 'memor
y/target': '524288', 'image/guest-version': '2.6', 
'image/features/supervisor-mode-kernel': '1', 'image/pae-mode': 'ye
s', 'console/limit': '1048576', 'image/paddr-offset': '0', 
'image/hypercall-page': '3222278144', 'image/suspend-cancel
': '1', 'cpu/0/availability': 'online', 
'image/features/pae-pgdir-above-4gb': '1', 
'image/features/writable-page-table
s': '1', 'image/features/auto-translated-physmap': '1', 'name': 
'migrating-centos5', 'domid': '3', 'image/xen-version'
: 'xen-3.0', 'store/port': '1'}
[2007-05-26 17:20:03 3206] DEBUG (XendCheckpoint:320) suspend
[2007-05-26 17:20:03 3206] DEBUG (XendCheckpoint:91) In saveInputHandler 
suspend
[2007-05-26 17:20:03 3206] DEBUG (XendCheckpoint:93) Suspending 3 ...
[2007-05-26 17:20:03 3206] DEBUG (XendDomainInfo:443) 
XendDomainInfo.shutdown(suspend)
[2007-05-26 17:20:03 3206] DEBUG (XendDomainInfo:908) 
XendDomainInfo.handleShutdownWatch
[2007-05-26 17:20:03 3206] DEBUG (XendDomainInfo:908) 
XendDomainInfo.handleShutdownWatch
[2007-05-26 17:20:03 3206] INFO (XendCheckpoint:98) Domain 3 suspended.
[2007-05-26 17:20:03 3206] INFO (XendDomainInfo:1090) Domain has 
shutdown: name=migrating-centos5 id=3 reason=suspend.
[2007-05-26 17:20:03 3206] DEBUG (XendCheckpoint:107) Written done
[2007-05-26 17:20:05 3206] INFO (XendCheckpoint:349) ERROR Internal 
error: Timed out waiting for frame list updated.
[2007-05-26 17:20:05 3206] INFO (XendCheckpoint:349) ERROR Internal 
error: Failed to map/save the p2m frame list
[2007-05-26 17:20:05 3206] INFO (XendCheckpoint:349) Save exit rc=1
[2007-05-26 17:20:05 3206] ERROR (XendCheckpoint:140) Save failed on 
domain centos5 (3).
Traceback (most recent call last):
  File "/usr/lib64/python/xen/xend/XendCheckpoint.py", line 109, in save
    forkHelper(cmd, fd, saveInputHandler, False)
  File "/usr/lib64/python/xen/xend/XendCheckpoint.py", line 337, in 
forkHelper
    raise XendError("%s failed" % string.join(cmd))
XendError: /usr/lib64/xen/bin/xc_save 22 3 0 0 0 failed
[2007-05-26 17:20:05 3206] DEBUG (XendDomainInfo:1699) 
XendDomainInfo.resumeDomain(3)
[2007-05-26 17:20:05 3206] DEBUG (XendCheckpoint:143) 
XendCheckpoint.save: resumeDomain
[2007-05-26 17:21:24 3206] DEBUG (XendDomainInfo:1660) 
XendDomainInfo.destroy: domid=3
[2007-05-26 17:21:24 3206] DEBUG (XendDomainInfo:1677) 
XendDomainInfo.destroyDomain(3)

Any idea what could be the problem ?

I tried both with source and binary tarballs and with latest mercurial 
build too....

Thank you for your answers.

Sébastien