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Date: Tue, 19 May 2009 20:42:52 -0400 (EDT)
From: Steven Rostedt <rostedt@goodmis.org>
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To: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
cc: Jason Baron <jbaron@redhat.com>, LKML <linux-kernel@vger.kernel.org>,
       Frederic Weisbecker <fweisbec@gmail.com>, Ingo Molnar <mingo@elte.hu>,
       Lai Jiangshan <laijs@cn.fujitsu.com>,
       Peter Zijlstra <peterz@infradead.org>, jiayingz@google.com,
       mbligh@google.com, roland@redhat.com,
       "Frank Ch. Eigler" <fche@redhat.com>,
       Christoph Hellwig <hch@infradead.org>
Subject: Re: [PATCH 0/3] tracepoints: delay argument evaluation
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On Tue, 19 May 2009, Mathieu Desnoyers wrote:
> 
> Given the tradeoff is taste vs overhead, what do you think of the
> following proposal ?
> 
> trace(block_bio_complete, md->queue, bio);

I'm fine with this. It is extremely important that the trace point 
overhead is negligible when disabled. Otherwise, they serve no purpose.

-- Steve