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Message-ID: <20080816133257.GA11063@elte.hu>
Date: Sat, 16 Aug 2008 15:32:57 +0200
From: Ingo Molnar <mingo@...e.hu>
To: Steven Rostedt <rostedt@...dmis.org>
Cc: 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>,
David Miller <davem@...emloft.net>
Subject: Re: [PATCH 0/2] ftrace updates
* Steven Rostedt <rostedt@...dmis.org> wrote:
> Due to the new mcount recording method, the assumptions about the
> records that hold the mcount locations have changed. Now we need to
> protect reading and writing of the records between module load and
> reading of the debugfs files. There is not much contention here, but
> they need to be protected none the less.
>
> I simply use the ftrace_lock to accomplish this. The ftrace_lock
> should never be held under interrupt context so disabling interrupts
> should not be necessary. I've run this under lockdep and lockdep has
> not complained.
applied to tip/tracing/ftrace - thanks Steve.
Ingo
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