[Xen-devel] Modifying Xen migration

[Vincenzo De Maio <vinc.demaio@xxxxxxxxx>]

Hello everyone,
for research purposes I'm working on Xen 3.0.3 and trying to make some
modifications to Xen migration. By looking at the documentation, I've
learned that the part I'm interesting in are handled by two binaries
(xc_save and xc_restore), so I thought about modifying just this two
binaries instead of recompiling the whole Xen everytime, so what I do
is just modifying this two binaries, recompile them with "make tools"
and then copy them into /usr/lib64/xen/bin/ . However, after doing
this, when running the migration command (xm migrate domain
destination) I got a popen error. What am I doing wrong? Please have a
look at the log below if it could be useful. Thanks a lot in advance!

Traceback (most recent call last):
  File "/usr/lib64/python2.4/site-packages/xen/xend/XendCheckpoint.py",
line 211, in save
    forkHelper(cmd, fd, saveInputHandler, False, dominfo)
  File "/usr/lib64/python2.4/site-packages/xen/xend/XendCheckpoint.py",
line 477, in forkHelper
    raise XendError("%s failed: popen failed" % string.join(cmd))
XendError: /usr/lib64/xen/bin/xc_save 23 1385 0 0 4 failed: popen failed
[2013-01-18 15:54:48 xend.XendDomainInfo 11608] DEBUG
(XendDomainInfo:2403) XendDomainInfo.resumeDomain(1385)
[2013-01-18 15:54:48 xend 11608] DEBUG (XendCheckpoint:240)
XendCheckpoint.save: resumeDomain
[2013-01-18 15:54:48 xend 11608] DEBUG (DevController:571)
hotplugStatusCallback
/local/domain/0/backend/vif/1385/0/hotplug-status.
[2013-01-18 15:54:48 xend 11608] DEBUG (DevController:585)
hotplugStatusCallback 1.
[2013-01-18 15:54:48 xend 11608] DEBUG (DevController:571)
hotplugStatusCallback
/local/domain/0/backend/vbd/1385/768/hotplug-status.
[2013-01-18 15:54:48 xend 11608] DEBUG (DevController:585)
hotplugStatusCallback 1.
[2013-01-18 15:54:48 xend 11608] DEBUG (DevController:571)
hotplugStatusCallback
/local/domain/0/backend/vbd/1385/5632/hotplug-status.
[2013-01-18 15:54:48 xend 11608] DEBUG (DevController:585)
hotplugStatusCallback 1.
[2013-01-18 15:56:53 xend 11608] DEBUG (XendCheckpoint:188) [xc_save]:
/usr/lib64/xen/bin/xc_save 22 1385 0 0 5
[2013-01-18 15:56:54 xend 11608] INFO (XendCheckpoint:511)
/usr/lib64/xen/bin/xc_save: symbol lookup error:
/usr/lib64/xen/bin/xc_save: undefined symbol: xc_linux_
[2013-01-18 15:56:54 xend 11608] ERROR (XendCheckpoint:236) Save
failed on domain system1 (1385).
Traceback (most recent call last):
  File "/usr/lib64/python2.4/site-packages/xen/xend/XendCheckpoint.py",
line 211, in save
    forkHelper(cmd, fd, saveInputHandler, False, dominfo)
  File "/usr/lib64/python2.4/site-packages/xen/xend/XendCheckpoint.py",
line 477, in forkHelper
    raise XendError("%s failed: popen failed" % string.join(cmd))
XendError: /usr/lib64/xen/bin/xc_save 22 1385 0 0 5 failed: popen failed
[2013-01-18 15:56:54 xend.XendDomainInfo 11608] DEBUG
(XendDomainInfo:2403) XendDomainInfo.resumeDomain(1385)
[2013-01-18 15:56:54 xend 11608] DEBUG (XendCheckpoint:240)
XendCheckpoint.save: resumeDomain
[2013-01-18 15:56:54 xend 11608] DEBUG (DevController:571)
hotplugStatusCallback
/local/domain/0/backend/vif/1385/0/hotplug-status.
[2013-01-18 15:56:54 xend 11608] DEBUG (DevController:585)
hotplugStatusCallback 1.
[2013-01-18 15:56:54 xend 11608] DEBUG (DevController:571)
hotplugStatusCallback
/local/domain/0/backend/vbd/1385/768/hotplug-status.
[2013-01-18 15:56:54 xend 11608] DEBUG (DevController:585)
hotplugStatusCallback 1.
[2013-01-18 15:56:54 xend 11608] DEBUG (DevController:571)
hotplugStatusCallback
/local/domain/0/backend/vbd/1385/5632/hotplug-status.
[2013-01-18 15:56:54 xend 11608] DEBUG (DevController:585)
hotplugStatusCallback 1.

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
http://lists.xen.org/xen-devel