VM Feature Identification
From Xen
Revision as of 16:32, 13 October 2014 by Rcpavlicek (talk | contribs)
When you control your own hypervisor, you are aware of the features you are using, since you have configured the system and the VMs. However, if you are using a service provider for your hosting or cloud, you need to do some detective work to determine the hypervisor mode and features employed.
MODE DETECTION
From dmesg:
If your VM is either HVM or PVHVM, look for:
[ 0.000000] Hypervisor detected: Xen HVM
If your VM is PV or PVH, look for:
[ 0.000000] Booting paravirtualized kernel on Xen
REFERENCES
- A truly great article by Brendan Gregg