Re: [PATCH 3/8] KVM: Activate fpu on clts

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On 01/23/2010 08:56 PM, Marcelo Tosatti wrote:
On Thu, Jan 21, 2010 at 03:31:47PM +0200, Avi Kivity wrote:
Assume that if the guest executes clts, it knows what it's doing, and load the
guest fpu to prevent an #NM exception.

Signed-off-by: Avi Kivity<avi@xxxxxxxxxx>
---
Out of curiosity, previously you assumed lazy activation on clts was a
win. Why undo it?

It wasn't so much assuming it's a win, it's more I was too lazy to find out. But it was easy to see from the traces that clts is often followed by #NM.

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

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