linux-kernel - Re: [RFC PATCH] tracing: Don't call wakeup() when committing the event

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Message-ID: <20110503230812.GF2678@nowhere>
Date:	Wed, 4 May 2011 01:08:14 +0200
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	Vaibhav Nagarnaik <vnagarnaik@...gle.com>,
	Ingo Molnar <mingo@...hat.com>,
	Michael Rubin <mrubin@...gle.com>,
	David Sharp <dhsharp@...gle.com>, linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH] tracing: Don't call wakeup() when committing the
 event

On Tue, May 03, 2011 at 06:47:32PM -0400, Steven Rostedt wrote:
> On Wed, 2011-05-04 at 00:09 +0200, Frederic Weisbecker wrote:
> 
> > I wonder if we should have a lite version of wake_up() that checks
> > if the list of waiters is empty before locking the queue.
> > After all we don't care much about tight races for tracing.
> 
> Since tracing is a special case here, we probably could get away to just
> do it ourselves. That is, have our own flag that determines if we should
> wakeup or not.

Yep, agreed.
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