Hi, list:
I am in the process of upgrading my hypervisors clusters from XenServer 6.5 to
7.0 for all my ACS instances.
My XS 7.0 clusters are patched up to XS70E050.
During cluster rolling upgrade, VM instances are live migrated several times,
eventually all of them running on XS 7.0 hosts.
However, out of a hundred or so instances, a few of rhle 6.x VM got stuck at
“Plex86/Bochs VGABios …” screen with at least one vCPU at 100%.
Comparing VM parameters between running and stuck instances, I can see that
running instances are PV guests while stuck instances are HVM guests.
RHEL 7.x guest are always in HVM mode and always runs on both XS 6.5 and 7.0
hosts.
Running RHEL6.x guests:
HVM-boot-policy ( RW):
HVM-boot-params (MRW):
HVM-shadow-multiplier ( RW): 1.000
PV-args ( RW): graphical utf8
PV-bootloader ( RW): pygrub
Stuck RHEL 6.x guests:
HVM-boot-policy ( RW): BIOS order
HVM-boot-params (MRW): order: dc
HVM-shadow-multiplier ( RW): 1.000
PV-args ( RW):
PV-bootloader ( RW):
Why does CloudStack convert just a few rhel 6.x instances into HVM mode, while
leaving most in PV mode?
How would I force them back to PV guests?
Thanks for all the help
Yiping
