[Tmem-devel] Queries on KSM & Tmem

[ash win]

Does XEN fully support KSM (Kernel Samepage Merging)? if yes then whats the use of tmem?I understand the fact that KSM may provide overcommitment to the Guest OSs but at the cost of CPU utilization for finding and merging same pages,but KSM can also be disabled.
 
And why tmem supports only PV and not HVM ?If complete overcommitment is not good according to tmem concept then why page sharing is allowed in HVM? Whether overcommitment is not provided to HVM Guest?

--Regards
Ashwin Vasani
Pune Institute of Computer Technology
Pune,India