Comment 2 for bug 537601

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Alok Kataria (akataria) wrote :

There are no compatibility issues, VMI (paravirtualization) was always an optimization, guests without VMI support still run fine on all VMware products. The only caveat is that on older hardware (read without EPT or RVI), VMI disabled guest will run a little slower compared to one which has VMI enabled.

My post on LKML has some details about the performance impact.
http://lkml.org/lkml/2009/9/17/466