[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date: Wed, 4 Apr 2007 17:56:34 +0200
From: Andi Kleen <ak@...e.de>
To: Jeremy Fitzhardinge <jeremy@...p.org>
Cc: Andrew Morton <akpm@...ux-foundation.org>,
virtualization@...ts.osdl.org, lkml <linux-kernel@...r.kernel.org>,
Ingo Molnar <mingo@...e.hu>
Subject: Re: [patch 04/17] Add pagetable accessors to pack and unpack pagetable entries
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
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists