Re: [patch 04/17] Add pagetable accessors to pack and unpack pagetableentries
From: Jeremy Fitzhardinge
Date: Wed Apr 04 2007 - 11:46:22 EST
Andi Kleen wrote:
> Why is there a difference for null syscall? I had assumed we patched all the
> fast path cases relevant there. Do you have an idea where it comes from?
Sure. There's indirect calls for things like sti/cli/iret. It goes
back to native speed when you patch the real instructions inline.
J
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