[Fedora-xen] Live migration fails depending on on the kernel Version of DomU

[Harald Schwier]

Hi,
I'm running a two node cluster xen-Cluster with CentOS 5.3. I'm using
gfs2 for the  cluster filesystem and kernel 2.6.18-128.1.6.el5xen #1 SMP
for the Dom0 kernel.

Live migration works fine as long as the DomU guest is running CentOS 5.3
or SLC 4.7 with kernel version 2.6.9-55.EL.cern. But if the SLC 4.7 guest is
running the current 2.6.9-78.0.17.EL.cern kernel, the migration freezes 
without
an error message.

Any idea why the DomU kernel has an impact on live migration? Is  there a
possibility to migrate a DomU guest running kernel 2.6.9-78.0.17.EL.cern?
Thanks in advance,
Harald



Migration from hosta to hostb
hosta /var/log/xen/xend.log
....
[2009-04-29 09:05:14 xend 5219] DEBUG (DevController:510) 
hotplugStatusCallback 1.
[2009-04-29 09:05:14 xend 5219] DEBUG (DevController:154) Waiting for 
devices usb.
[2009-04-29 09:05:14 xend 5219] DEBUG (DevController:154) Waiting for 
devices vbd.
[2009-04-29 09:05:14 xend 5219] DEBUG (DevController:160) Waiting for 768.
[2009-04-29 09:05:14 xend 5219] DEBUG (DevController:496) 
hotplugStatusCallback /local/domain/0/backend/vbd/17/768/hotplug-status.
[2009-04-29 09:05:14 xend 5219] DEBUG (DevController:496) 
hotplugStatusCallback /local/domain/0/backend/vbd/17/768/hotplug-status.
[2009-04-29 09:05:14 xend 5219] DEBUG (DevController:510) 
hotplugStatusCallback 1.
[2009-04-29 09:05:14 xend 5219] DEBUG (DevController:160) Waiting for 5632.
[2009-04-29 09:05:14 xend 5219] DEBUG (DevController:496) 
hotplugStatusCallback /local/domain/0/backend/vbd/17/5632/hotplug-status.
[2009-04-29 09:05:14 xend 5219] DEBUG (DevController:496) 
hotplugStatusCallback /local/domain/0/backend/vbd/17/5632/hotplug-status.
[2009-04-29 09:05:14 xend 5219] DEBUG (DevController:510) 
hotplugStatusCallback 1.
[2009-04-29 09:05:14 xend 5219] DEBUG (DevController:154) Waiting for 
devices irq.
[2009-04-29 09:05:14 xend 5219] DEBUG (DevController:154) Waiting for 
devices vkbd.
[2009-04-29 09:05:14 xend 5219] DEBUG (DevController:154) Waiting for 
devices vfb.
[2009-04-29 09:05:14 xend 5219] DEBUG (DevController:154) Waiting for 
devices pci.
[2009-04-29 09:05:14 xend 5219] DEBUG (DevController:154) Waiting for 
devices ioports.
[2009-04-29 09:05:14 xend 5219] DEBUG (DevController:154) Waiting for 
devices tap.
[2009-04-29 09:05:14 xend 5219] DEBUG (DevController:154) Waiting for 
devices vtpm.
[2009-04-29 09:08:04 xend 5219] DEBUG (XendCheckpoint:89) [xc_save]: 
/usr/lib64/xen/bin/xc_save 23 17 0 0 5
[2009-04-29 09:08:14 xend 5219] INFO (XendCheckpoint:351) Saving memory 
pages: iter 1  95%^M 1: sent 982654, skipped 355, delta 9327ms, dom0 
57%, target 1%, sent 3452Mb/s, dirtied 1Mb/s 412 pages
[2009-04-29 09:08:14 xend 5219] INFO (XendCheckpoint:351) Saving memory 
pages: iter 2   0%^M 2: sent 398, skipped 15, delta 20 ms, dom0 100%, 
target 0%, sent 652Mb/s, dirtied 24Mb/s 15 pages
[2009-04-29 09:08:14 xend 5219] INFO (XendCheckpoint:351) Saving memory 
pages: iter 3   0%^M 3: sent 0, skipped 15, Start last iteration
[2009-04-29 09:08:14 xend 5219] DEBUG (XendCheckpoint:322) suspend
[2009-04-29 09:08:14 xend 5219] DEBUG (XendCheckpoint:92) In 
saveInputHandler suspend
[2009-04-29 09:08:14 xend 5219] DEBUG (XendCheckpoint:94) Suspending 17 ...
[2009-04-29 09:08:14 xend.XendDomainInfo 5219] DEBUG 
(XendDomainInfo:1036) XendDomainInfo.handleShutdownWatch
[2009-04-29 09:08:14 xend.XendDomainInfo 5219] DEBUG 
(XendDomainInfo:1036) XendDomainInfo.handleShutdownWatch

hostb /var/log/xen/xend.log
....
[2009-04-29 09:08:04 xend 5175] INFO (XendCheckpoint:179) restore hvm 
domain 11, apic=0, pae=0
[2009-04-29 09:08:04 xend 5175] DEBUG (image:328) args: boot, val: c
[2009-04-29 09:08:04 xend 5175] DEBUG (image:328) args: fda, val: None
[2009-04-29 09:08:04 xend 5175] DEBUG (image:328) args: fdb, val: None
[2009-04-29 09:08:04 xend 5175] DEBUG (image:328) args: soundhw, val: None
[2009-04-29 09:08:04 xend 5175] DEBUG (image:328) args: localtime, val: None
[2009-04-29 09:08:04 xend 5175] DEBUG (image:328) args: serial, val: pty
[2009-04-29 09:08:04 xend 5175] DEBUG (image:328) args: std-vga, val: None
[2009-04-29 09:08:04 xend 5175] DEBUG (image:328) args: isa, val: None
[2009-04-29 09:08:04 xend 5175] DEBUG (image:328) args: vcpus, val: 1
[2009-04-29 09:08:04 xend 5175] DEBUG (image:328) args: acpi, val: 1
[2009-04-29 09:08:04 xend 5175] DEBUG (image:328) args: usb, val: 1
[2009-04-29 09:08:04 xend 5175] DEBUG (image:328) args: usbdevice, val: None
[2009-04-29 09:08:04 xend 5175] DEBUG (image:328) args: k, val: de
[2009-04-29 09:08:05 xend 5175] DEBUG (image:388) No VNC passwd 
configured for vfb access
[2009-04-29 09:08:05 xend 5175] DEBUG (XendCheckpoint:198) 
restore:shadow=0x9, _static_max=0x400, _static_min=0x400,
[2009-04-29 09:08:05 xend 5175] DEBUG (balloon:143) Balloon: 29835376 
KiB free; need 1065984; done.
[2009-04-29 09:08:05 xend 5175] DEBUG (XendCheckpoint:215) [xc_restore]: 
/usr/lib64/xen/bin/xc_restore 23 11 2 3 1 0 0
[2009-04-29 09:08:05 xend 5175] INFO (XendCheckpoint:351) 
xc_domain_restore start: p2m_size = 100000
[2009-04-29 09:08:05 xend 5175] INFO (XendCheckpoint:351) Reloading 
memory pages:   0%