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Date: Thu, 17 Apr 2008 20:06:34 -0400
From: Mathieu Desnoyers <compudj@krystal.dyndns.org>
To: Andi Kleen <andi@firstfloor.org>
Cc: mingo@elte.hu, akpm@osdl.org, "H. Peter Anvin" <hpa@zytor.com>,
       Jeremy Fitzhardinge <jeremy@goop.org>,
       Steven Rostedt <rostedt@goodmis.org>,
       "Frank Ch. Eigler" <fche@redhat.com>, linux-kernel@vger.kernel.org
Subject: Re: [RFC PATCH] x86 NMI-safe INT3 and Page Fault (v5)
Message-ID: <20080418000634.GB5062@Krystal>
References: <20080417165839.GA25198@Krystal> <20080417165944.GB25198@Krystal> <20080417201410.GB31616@Krystal> <87od889m44.fsf@basil.nowhere.org>
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* Andi Kleen (andi@firstfloor.org) wrote:
> Mathieu Desnoyers <compudj@krystal.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