linux-kernel - Re: [PATCH 7/9] ftrace, perf: Add support to use function tracepoint in perf

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Message-ID: <1322511375.17003.25.camel@frodo>
Date:	Mon, 28 Nov 2011 15:16:15 -0500
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	Jiri Olsa <jolsa@...hat.com>, fweisbec@...il.com, mingo@...hat.com,
	paulus@...ba.org, acme@...stprotocols.net,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 7/9] ftrace, perf: Add support to use function
 tracepoint in perf

On Mon, 2011-11-28 at 21:10 +0100, Peter Zijlstra wrote:

> > Yeah, but still not something you want to do during context switches,
> > right? 
> 
> Also, that's x86, there's still archs that need stop_machine(), right?

s390 may need it, but till we add a work around there too.

But yeah, if this happens at context switch, then we want the fast
enable/disable that Jiri made.

-- Steve



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