linux-kernel - Re: [PATCH 0/5] ftrace: to kill a daemon

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Message-ID: <20080809011305.GD9038@one.firstfloor.org>
Date:	Sat, 9 Aug 2008 03:13:05 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Roland McGrath <roland@...hat.com>
Cc:	Steven Rostedt <rostedt@...dmis.org>,
	Andi Kleen <andi@...stfloor.org>,
	Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>,
	LKML <linux-kernel@...r.kernel.org>, Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	Peter Zijlstra <peterz@...radead.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	David Miller <davem@...emloft.net>,
	Ulrich Drepper <drepper@...hat.com>,
	Rusty Russell <rusty@...tcorp.com.au>,
	Jeremy Fitzhardinge <jeremy@...p.org>,
	Gregory Haskins <ghaskins@...ell.com>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	"Luis Claudio R. Goncalves" <lclaudio@...g.org>,
	Clark Williams <williams@...hat.com>
Subject: Re: [PATCH 0/5] ftrace: to kill a daemon

On Fri, Aug 08, 2008 at 05:53:26PM -0700, Roland McGrath wrote:
> Are we sure there aren't some good available 5-byte nops?
> 
> e.g. for 64-bit maybe 3e 48 8d 76 00
>      for 32-bit maybe 3e 8d 74 26 00
> 
> Have the chip folks confirmed that exactly the set we have in
> asm-x86/nops.h are the only optimal ones?

They were based on the respective optimization manuals, so yes.

-Andi
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