From: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: Masami Hiramatsu <mhiramat@redhat.com>,
Nick Piggin <npiggin@suse.de>,
Peter Zijlstra <peterz@infradead.org>,
akpm <akpm@linux-foundation.org>,
linux-kernel <linux-kernel@vger.kernel.org>,
Ingo Molnar <mingo@elte.hu>,
Ananth N Mavinakayanahalli <ananth@in.ibm.com>,
Jim Keniston <jkenisto@us.ibm.com>
Subject: Re: irq-disabled vs vmap vs text_poke
Date: Tue, 17 Feb 2009 12:28:50 -0500 [thread overview]
Message-ID: <20090217172850.GB14435@Krystal> (raw)
In-Reply-To: <alpine.DEB.1.10.0902171224050.910@gandalf.stny.rr.com>
* Steven Rostedt (rostedt@goodmis.org) wrote:
>
> 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
>
OK, so without text_poke, how does it deal with kernel with text pages
marked read-only after boot ?
Mathieu
--
Mathieu Desnoyers
OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F BA06 3F25 A8FE 3BAE 9A68
next prev parent reply other threads:[~2009-02-17 17:29 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-02-13 12:50 irq-disabled vs vmap vs text_poke Peter Zijlstra
2009-02-13 12:55 ` Nick Piggin
2009-02-13 13:02 ` Peter Zijlstra
2009-02-13 13:04 ` Ingo Molnar
2009-02-13 14:25 ` Mathieu Desnoyers
2009-02-13 14:33 ` Peter Zijlstra
2009-02-13 14:43 ` Mathieu Desnoyers
2009-02-13 18:05 ` Ingo Molnar
2009-02-13 13:05 ` Peter Zijlstra
2009-02-13 13:09 ` Nick Piggin
2009-02-13 14:18 ` Mathieu Desnoyers
2009-02-13 14:28 ` Peter Zijlstra
2009-02-13 16:32 ` Masami Hiramatsu
2009-02-13 16:38 ` Peter Zijlstra
2009-02-13 16:55 ` Mathieu Desnoyers
2009-02-13 18:14 ` Masami Hiramatsu
2009-02-13 18:57 ` Mathieu Desnoyers
2009-02-13 21:41 ` Masami Hiramatsu
2009-02-16 15:04 ` Masami Hiramatsu
2009-02-16 15:31 ` Nick Piggin
2009-02-16 17:24 ` Mathieu Desnoyers
2009-02-17 2:00 ` Masami Hiramatsu
2009-02-17 3:03 ` Nick Piggin
2009-02-17 8:31 ` Peter Zijlstra
2009-02-17 17:13 ` Masami Hiramatsu
2009-02-17 16:48 ` Masami Hiramatsu
2009-02-17 17:02 ` Steven Rostedt
2009-02-17 17:18 ` Mathieu Desnoyers
2009-02-17 17:24 ` Steven Rostedt
2009-02-17 17:28 ` Mathieu Desnoyers [this message]
2009-02-17 17:48 ` Steven Rostedt
2009-02-13 14:27 ` [PATCH] x86: text_poke might sleep Mathieu Desnoyers
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