Bug 220011

Summary: xc_save dies with "Couldn't enable shadow mode: 12"
Product: [Fedora] Fedora Reporter: David Juran <djuran>
Component: xenAssignee: Xen Maintainance List <xen-maint>
Status: CLOSED CURRENTRELEASE QA Contact: Brian Brock <bbrock>
Severity: medium Docs Contact:
Priority: medium    
Version: 6CC: bstein, katzj
Target Milestone: ---   
Target Release: ---   
Hardware: x86_64   
OS: Linux   
Fixed In Version: xen-3.0.3-8.fc6 Doc Type: Bug Fix
Doc Text:
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Clone Of: Environment:
Last Closed: 2007-05-22 11:43:14 EDT Type: ---
Regression: --- Mount Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description David Juran 2006-12-18 08:16:08 EST
From Bugzilla Helper:
User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv: Gecko/20061107 Fedora/ Firefox/

Description of problem:
When trying to do 'xm migrate" on a PV guest, the operation (most often) fails and the blurb below ends up in the xend log. The weird thing is that _once_ I've gotten it to work. Every other time, with the same configuration it fails with the error below...

2006-12-13 19:14:13 xend 4536] DEBUG (balloon:127) Balloon: 18372 KiB free; need 17408; done.
[2006-12-13 19:14:13 xend 4536] DEBUG (XendCheckpoint:83) [xc_save]: /usr/lib64/xen/bin/xc_save 21 3 0 0 1
[2006-12-13 19:14:13 xend 4536] ERROR (XendCheckpoint:236) Couldn't enable shadow mode: 12
[2006-12-13 19:14:13 xend 4536] ERROR (XendCheckpoint:236) Save exit rc=1
[2006-12-13 19:14:13 xend 4536] ERROR (XendCheckpoint:106) Save failed on domain guest2 (3).
Traceback (most recent call last):
  File "/usr/lib64/python2.4/site-packages/xen/xend/XendCheckpoint.py", line 100, in save
    forkHelper(cmd, fd, saveInputHandler, False)
  File "/usr/lib64/python2.4/site-packages/xen/xend/XendCheckpoint.py", line 227, in forkHelper
    raise XendError("%s failed" % string.join(cmd))
XendError: /usr/lib64/xen/bin/xc_save 21 3 0 0 1 failed

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1. xm migrate guest1 hat

Actual Results:

Expected Results:

Additional info:
Comment 1 Daniel Berrange 2007-03-27 14:27:44 EDT
There have been many updates to the Xen RPM since 3.0.3-0.1.rc3, so please
re-test with latest errata & if it no longer has a problem close this ticket.
Comment 2 David Juran 2007-05-22 11:43:14 EDT
Sorry for the long delay but this is indeed fixed on xen-3.0.3-8.fc6