linux-kernel - Re: [RFC][PATCH 0/4] ftrace: Use -mfentry when supported (this is for x86

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Message-ID: <1297973501.23343.953.camel@gandalf.stny.rr.com>
Date:	Thu, 17 Feb 2011 15:11:41 -0500
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
Cc:	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...e.hu>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Frederic Weisbecker <fweisbec@...il.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
	Andi Kleen <andi@...stfloor.org>,
	2nddept-manager@....hitachi.co.jp
Subject: Re: [RFC][PATCH 0/4] ftrace: Use -mfentry when supported (this is
 for x86_64 right now)

On Fri, 2011-02-18 at 01:07 +0900, Masami Hiramatsu wrote:

> I just thought that frequent stop-machine is not so good from the user's
> POV. I agree that disabled probe ignoring the call is enough.
> Maybe, it could be done with the similar mechanism of jump optimization.

I thought jump optimization still calls stop_machine too?

-- Steve


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