linux-kernel - Re: [PATCH 0/4] RFC: jump label

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Message-Id: <1252010706.9808.19.camel@desktop>
Date:	Thu, 03 Sep 2009 13:45:06 -0700
From:	Daniel Walker <dwalker@...o99.com>
To:	Jason Baron <jbaron@...hat.com>
Cc:	linux-kernel@...r.kernel.org, mathieu.desnoyers@...ymtl.ca,
	roland@...hat.com, rth@...hat.com, mingo@...e.hu
Subject: Re: [PATCH 0/4] RFC: jump label - (tracepoint optimizations)

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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