Subject: Re: [PATCH 0/4] RFC: jump label - (tracepoint optimizations)
From: Daniel Walker <dwalker@fifo99.com>
To: Jason Baron <jbaron@redhat.com>
Cc: linux-kernel@vger.kernel.org, mathieu.desnoyers@polymtl.ca,
       roland@redhat.com, rth@redhat.com, mingo@elte.hu
In-Reply-To: <cover.1252007851.git.jbaron@redhat.com>
References: <cover.1252007851.git.jbaron@redhat.com>
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Date: Thu, 03 Sep 2009 13:45:06 -0700
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On Thu, 2009-09-03 at 16:25 -0400, Jason Baron wrote:
> hi,
> 
> Problem:
> 
> Currenly, tracepoints are implemented using a conditional. The conditional
> check requires checking a global variable for each tracepoint. Although,
> the overhead of this check is small, it increases under memory pressure. As we
> increase the number of tracepoints in the kernel this may become more of an
> issue. In addition, tracepoints are often dormant (disabled), and provide no
> direct kernel functionality. Thus, it is highly desirable to reduce their
> impact as much as possible. Mathieu Desnoyers has already suggested a number of
> requirements for a solution to this issue.

Could you run your patches though scripts/checkpatch.pl and clean up any
errors.. It looks like you have some style issues in a few of the
patches.

Daniel

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