[Xen-users] xm save fails with

[fess <fess-xenlists@xxxxxxxx>]

Help,  I'm trying to get save/restore working, and I keep running into 
troubles.
I don't know where to look next.

first I had to get to xen-3.0.2 in order to enable CONFIG_HOTPLUG_CPU 
guess x86_64 didn't have it yet
Then I had one success, with one domU,  save, restore,  etc. [w/debian] 
 Then I attempted  with another domU,
[w/centos and 7G of ram.]  and it failed.   Since then I haven't been 
able to save any domU.
xm save just fails, and leaves the domU in shutdown state.

[root ~]# xm list
Name                              ID Mem(MiB) VCPUs State  Time(s)
Domain-0                           0      251     1 r-----    28.2
old_herbie                         3      768     2 -b----     0.7
[root ~]# xm save old_herbie old_herbie.xensav
Error: /usr/lib64/xen/bin/xc_save 10 16 3 0 0 0 failed
[root@herbieII ~]# xm list
Name                              ID Mem(MiB) VCPUs State  Time(s)
Domain-0                           0      251     1 r-----    32.0
old_herbie                         3      768     1 ---s--     0.8

Xend.log says this:


[2006-05-08 22:28:41 xend] DEBUG (XendCheckpoint:80) [xc_save]: 
/usr/lib64/xen/bin/xc_save 10 16 3 0 0 0
[2006-05-08 22:28:41 xend] DEBUG (XendCheckpoint:200) suspend
[2006-05-08 22:28:41 xend] DEBUG (XendCheckpoint:83) In 
saveInputHandler suspend
[2006-05-08 22:28:41 xend] DEBUG (XendCheckpoint:85) Suspending 3 ...
[2006-05-08 22:28:41 xend.XendDomainInfo] DEBUG (XendDomainInfo:877) 
XendDomainInfo.handleShutdownWatch
[2006-05-08 22:28:41 xend.XendDomainInfo] DEBUG (XendDomainInfo:877) 
XendDomainInfo.handleShutdownWatch
[2006-05-08 22:28:42 xend.XendDomainInfo] INFO (XendDomainInfo:836) 
Domain has shutdown: name=migrating-old_herbie id=3 reason=suspend.
[2006-05-08 22:28:42 xend] INFO (XendCheckpoint:88) Domain 3 suspended.
[2006-05-08 22:28:42 xend] DEBUG (XendCheckpoint:91) Written done
[2006-05-08 22:28:42 xend] ERROR (XendCheckpoint:227) Had 0 unexplained 
entries in p2m table
[2006-05-08 22:28:57 xend] ERROR (XendCheckpoint:227) Saving memory 
pages: iter 1  95%Error when writing to state file (5): 0
[2006-05-08 22:28:57 xend] ERROR (XendCheckpoint:227) Save exit rc=1
[2006-05-08 22:28:57 xend] ERROR (XendCheckpoint:99) Save failed on 
domain old_herbie (3).
Traceback (most recent call last):
  File "/usr/lib64/python/xen/xend/XendCheckpoint.py", line 93, in save
    forkHelper(cmd, fd, saveInputHandler, False)
  File "/usr/lib64/python/xen/xend/XendCheckpoint.py", line 218, in 
forkHelper
    raise XendError("%s failed" % string.join(cmd))
XendError: /usr/lib64/xen/bin/xc_save 10 16 3 0 0 0 failed
[2006-05-08 22:29:23 xend.XendDomainInfo] INFO (XendDomainInfo:836) 
Domain has shutdown: name=old_herbie id=3 reason=suspend.

Any help would be much appreciated, I don't know where to go from here.


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