[Xen-devel] Re: [patch 13/26] Xen-paravirt_ops: Consistently wrap paravirt ops callsites to make them patchable

[Andi Kleen <ak@xxxxxx>]

> But I was throwing that out as a long-term thing. I'm not claiming it's 
> trivial, but it should be doable.

One thing I was pondering was to replace the expensive popfs with

bt  $IF,(%rsp) 
jnc 1f 
sti
1: 

But would be mostly a P4 optimization again and I'm not 100% sure it is
worth it.

-Andi


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