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Date: Tue, 23 Feb 2010 22:28:00 -0000
From: Masami Hiramatsu <mhiramat@redhat.com>
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To: rostedt@goodmis.org
CC: Frederic Weisbecker <fweisbec@gmail.com>, Ingo Molnar <mingo@elte.hu>,         Ananth N Mavinakayanahalli <ananth@in.ibm.com>,         lkml <linux-kernel@vger.kernel.org>,         Jim Keniston <jkenisto@us.ibm.com>,         Srikar Dronamraju <srikar@linux.vnet.ibm.com>,         Christoph Hellwig <hch@infradead.org>,         "H. Peter Anvin" <hpa@zytor.com>, Anders Kaseorg <andersk@ksplice.com>,         Tim Abbott <tabbott@ksplice.com>, Andi Kleen <andi@firstfloor.org>,         Jason Baron <jbaron@redhat.com>,         Mathieu Desnoyers <compudj@krystal.dyndns.org>,         systemtap <systemtap@sources.redhat.com>,         DLE <dle-develop@lists.sourceforge.net>
Subject: Re: [PATCH -tip v10 0/9] kprobes: Kprobes jump optimization support
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Steven Rostedt wrote:
> On Thu, 2010-02-18 at 17:12 -0500, Masami Hiramatsu wrote:
> 
>> This version of patch series uses text_poke_smp() which
>> update kernel text by stop_machine(). That is 'officially'
>> supported on Intel's processors. text_poke_smp() can't
>> be used for modifying NMI code,
> 
> But it can be made to use with NMI code. If you look at what I did to
> allow ftrace to modify NMI code, it may be able to do the same thing.

Yeah, I know. But basically, kprobes doesn't support probing NMI.
Maybe, it's possibly the next step. :)

Thank you,

-- 
Masami Hiramatsu
e-mail: mhiramat@redhat.com