Re: [patch 04/17] Add pagetable accessors to pack and unpack pagetable entries

Andi Kleen
2007-04-04T15:56:42Z

On Wednesday 04 April 2007 17:45:44 Jeremy Fitzhardinge wrote:
> 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.

I was talking about the patched case. It seemed to be a little slower
too, but in theory it shouldn't have been, no?

-Andi