linux-kernel - Re: [RFC PATCH] x86 NMI-safe INT3 and Page Fault (v5)

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Message-ID: <20080418000634.GB5062@Krystal>
Date:	Thu, 17 Apr 2008 20:06:34 -0400
From:	Mathieu Desnoyers <compudj@...stal.dyndns.org>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	mingo@...e.hu, akpm@...l.org, "H. Peter Anvin" <hpa@...or.com>,
	Jeremy Fitzhardinge <jeremy@...p.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	"Frank Ch. Eigler" <fche@...hat.com>, linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH] x86 NMI-safe INT3 and Page Fault (v5)

* Andi Kleen (andi@...stfloor.org) wrote:
> Mathieu Desnoyers <compudj@...stal.dyndns.org> writes:
> >
> > It allows placing immediate values (and therefore optimized trace_marks) in NMI
> > code
> 
> Only if all your trace_mark infrastructure is lock less.
> 
> -Andi
> 

It uses RCU-style updates and has been designed to be lockless from the
ground up.

Mathieu

-- 
Mathieu Desnoyers
Computer Engineering Ph.D. Student, Ecole Polytechnique de Montreal
OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F  BA06 3F25 A8FE 3BAE 9A68
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