Re: [PATCH RFC 0/2] kvm: Improving undercommit,overcommit scenariosin PLE handler

[Peter Zijlstra]

On Fri, 2012-09-21 at 17:29 +0530, Raghavendra K T wrote:
> In some special scenarios like #vcpu <= #pcpu, PLE handler may 
> prove very costly, because there is no need to iterate over vcpus
> and do unsuccessful yield_to burning CPU. 

What's the costly thing? The vm-exit, the yield (which should be a nop
if its the only task there) or something else entirely?


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