On Fri, May 02, 2008 at 12:28:32PM +0300, Avi Kivity wrote:
> Applied, thanks. Dynamic allocation for the fpu state was introduced in 
> 2.6.26-rc, right?

It seems very recent, hit mainline on 30 Apr.

Also we may want to think if there's something cheaper than fx_save to
trigger a math exception that doesn't alter the fpu state, I didn't
think much about it given it's such a slow path that's probably not
worth changing with something more complicated anyway. And bringing in
a few l1 exclusive cachelines in the cpu should allow the second
instruction to repeat faster than the first.

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