On 06/15/2009 10:02 PM, Peter Zijlstra wrote:
Ah, well, I have no idea who expensive cr2 is, if its like a regular register then it should be fine. If however its tons more expensive then we should really avoid it.
IIRC it's pretty cheap, I measured it once when tuning the kvm context switch code. I don't recall the exact numbers.
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