Hi
Regarding the Linux PV-on-HVM drivers - they may have the same issue. Full
PV guests do not as they have a gnttab_suspend() function called during
suspend callback (and for subtle reasons xc_domain_save can detect and not
save Xenheap pages for a full PV guests anyway - because it can see the P2M
table in that case).
Live migration of linux PVonHVM passed on Xen3.4 successfully, but
windows os with pv driver failed.
Like I said before -- unmapping the gnttab pages I think will not help you
for live migration, but I suppose it is a reasonable thing to do anyway. For
live migration I think xc_domain_save needs t get a bit smarter about
Xenheap pages in HVM guests.
Yes. The live migration of windows domu with pv driver failed again
after we added unmapping gnttab and shinfo pages in suspending process.
The save process is OK, but the restore hit the similar problem. So what
should we do in windows pv driver to avoid this problem? Any suggestion
for this issue?
Any suggestion is appreciated.
Following is the log of restore process:
[2009-08-21 00:17:34 2918] DEBUG (XendCheckpoint:278) [xc_restore]:
/usr/lib/xen/bin/xc_restore 31 33 2 3 1 1 1
[2009-08-21 00:17:34 2918] INFO (XendCheckpoint:418) xc_domain_restore
start: p2m_size = 100000
[2009-08-21 00:17:34 2918] INFO (XendCheckpoint:418) Reloading memory
pages: 0%
[2009-08-21 00:17:44 2918] INFO (XendCheckpoint:418) Failed allocation
for dom 33: 7 extents of order 0
[2009-08-21 00:17:44 2918] INFO (XendCheckpoint:418) ERROR Internal
error: Failed to allocate memory for batch.!
[2009-08-21 00:17:44 2918] INFO (XendCheckpoint:418)
[2009-08-21 00:17:44 2918] INFO (XendCheckpoint:418) Restore exit with rc=1
[2009-08-21 00:17:44 2918] DEBUG (XendDomainInfo:2750)
XendDomainInfo.destroy: domid=33
[2009-08-21 00:17:44 2918] ERROR (XendDomainInfo:2764)
XendDomainInfo.destroy: domain destruction failed.
Traceback (most recent call last):
File "/usr/lib/python2.4/site-packages/xen/xend/XendDomainInfo.py",
line 2757, in destroy
xc.domain_pause(self.domid)
Error: (3, 'No such process')
[2009-08-21 00:17:44 2918] DEBUG (XendDomainInfo:2225) No device model
[2009-08-21 00:17:44 2918] DEBUG (XendDomainInfo:2227) Releasing devices
[2009-08-21 00:17:44 2918] DEBUG (XendDomainInfo:2240) Removing vif/0
[2009-08-21 00:17:44 2918] DEBUG (XendDomainInfo:1142)
XendDomainInfo.destroyDevice: deviceClass = vif, device = vif/0
[2009-08-21 00:17:44 2918] DEBUG (XendDomainInfo:2240) Removing vbd/768
[2009-08-21 00:17:44 2918] DEBUG (XendDomainInfo:1142)
XendDomainInfo.destroyDevice: deviceClass = vbd, device = vbd/768
[2009-08-21 00:17:44 2918] DEBUG (XendDomainInfo:2240) Removing vfb/0
[2009-08-21 00:17:44 2918] DEBUG (XendDomainInfo:1142)
XendDomainInfo.destroyDevice: deviceClass = vfb, device = vfb/0
[2009-08-21 00:17:44 2918] DEBUG (XendDomainInfo:2240) Removing console/0
[2009-08-21 00:17:44 2918] DEBUG (XendDomainInfo:1142)
XendDomainInfo.destroyDevice: deviceClass = console, device = console/0
[2009-08-21 00:17:45 2918] ERROR (XendDomain:1149) Restore failed
Traceback (most recent call last):
File "/usr/lib/python2.4/site-packages/xen/xend/XendDomain.py", line
1147, in domain_restore_fd
return XendCheckpoint.restore(self, fd, paused=paused,
relocating=relocating)
File "/usr/lib/python2.4/site-packages/xen/xend/XendCheckpoint.py",
line 282, in restore
forkHelper(cmd, fd, handler.handler, True)
File "/usr/lib/python2.4/site-packages/xen/xend/XendCheckpoint.py",
line 406, in forkHelper
raise XendError("%s failed" % string.join(cmd))
XendError: /usr/lib/xen/bin/xc_restore 31 33 2 3 1 1 1 failed
Thanks
Annie.
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