linux-kernel - Re: irq-disabled vs vmap vs text

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Message-ID: <alpine.DEB.1.10.0902171224050.910@gandalf.stny.rr.com>
Date:	Tue, 17 Feb 2009 12:24:34 -0500 (EST)
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>
cc:	Masami Hiramatsu <mhiramat@...hat.com>,
	Nick Piggin <npiggin@...e.de>,
	Peter Zijlstra <peterz@...radead.org>,
	akpm <akpm@...ux-foundation.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Ingo Molnar <mingo@...e.hu>,
	Ananth N Mavinakayanahalli <ananth@...ibm.com>,
	Jim Keniston <jkenisto@...ibm.com>
Subject: Re: irq-disabled vs vmap vs text_poke


On Tue, 17 Feb 2009, Mathieu Desnoyers wrote:
> > 
> 
> Anyway dynamic ftrace only need to do code patching at early boot,
> right? Or do you need also to patch the call sites a bit later too ?
> Because there is a text_poke_early for that purpose : modifying code
> when it is still writable.

It modifies the code both at early boot up, and when it is enabled later 
on at run time.

-- Steve

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