linux-kernel - Re: [PATCH v2 3/3] trace-cmd: setting plugin to 'nop' clears data before it's recorded

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Message-ID: <1337765592.13348.143.camel@gandalf.stny.rr.com>
Date:	Wed, 23 May 2012 05:33:12 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Mark Asselstine <mark.asselstine@...driver.com>
Cc:	linux-kernel@...r.kernel.org, asselsm@...il.com
Subject: Re: [PATCH v2 3/3] trace-cmd: setting plugin to 'nop' clears data
 before it's recorded

On Sun, 2012-04-08 at 11:38 -0400, Mark Asselstine wrote:
> commit e09a5db1a929ab668c273b87c4f0a32b81e1c21a
> [trace-cmd: Add trace-cmd record --date option]
> 
> moved the call to disable_all() in trace_record() from after record_data()
> to before it. Unfortunately disable_all() sets 'nop' in 'current_tracer'
> which has the side affect of clearing 'trace', thus all the latency tracer
> reports are empty/useless. Here we make disable_all() optionally call
> set_plugin() thus, where we need to, we can delay the disabling of the tracer
> until we have had a chance to capture 'trace'. We have added this delayed
> behavior to trace_record() to fix the latency reports, for all other calls to
> disable_all() we continue to have set_plugin() called.
> 

Just letting you know that I just pushed your changes to my repo. Sorry
for being late, I got side-tracked, and forgot about your changes.

-- Steve


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