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SubjectRe: [PATCH 8/13] KVM: vcpu execution loop
Antonio Vargas wrote:
>>
>> I could do that, but I feel that's more brittle. I might need more (or
>> other) fields later on. It will also cost me more pushes on the stack
>> (no real performance or space impact, just C64-era frugality).
>
> maybe thats the mindsent needed to make these virtual cpu patches
> without eating away all the cpu power with more than needed
> abstractions ;)
>

Unfortunately not. Saving a cycle or two doesn't help when a vm exit
costs thousands of cycles, and worse, kills your tlb.

The key is eliminating unnecessary exits. I have plans for massively
optimizing the mmu virtualization, and the next AMD core will do that in
hardware (look for a "nested page tables" sticker before you buy).

--
Do not meddle in the internals of kernels, for they are subtle and quick to panic.

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