linux-kernel - Re: [PATCH 0/3] ring-buffer: less locking and only disable preemption

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Message-ID: <alpine.DEB.1.10.0810041315440.6571@gandalf.stny.rr.com>
Date:	Sat, 4 Oct 2008 13:18:14 -0400 (EDT)
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Mathieu Desnoyers <compudj@...stal.dyndns.org>
cc:	Ingo Molnar <mingo@...e.hu>, LKML <linux-kernel@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Peter Zijlstra <peterz@...radead.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Arjan van de Ven <arjan@...radead.org>
Subject: Re: [PATCH 0/3] ring-buffer: less locking and only disable
 preemption


On Sat, 4 Oct 2008, Mathieu Desnoyers wrote:
> 
> Or use this code, based on a temporary breakpoint, to do the code
> patching (part of the -lttng tree). It does not require stop_machine at
> all and is nmi safe.
> 

When this is supported for all archs, and can be done at all functions 
then I could use it.

I may just have the arch specific code use it, but we'll see.

Also, how good is it at patching 20,000 call sites?

-- Steve

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