linux-kernel - Re: [PATCH 3/3] ftrace: trace single pid for function graph tracer

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Message-Id: <20081203124915.2eb9e7cd.akpm@linux-foundation.org>
Date:	Wed, 3 Dec 2008 12:49:15 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	linux-kernel@...r.kernel.org, mingo@...e.hu, fweisbec@...il.com,
	peterz@...radead.org, arjan@...radead.org, dave@...ux.vnet.ibm.com,
	containers@...ts.osdl.org, ebiederm@...ssion.com,
	sukadev@...ux.vnet.ibm.com, serue@...ibm.com, srostedt@...hat.com
Subject: Re: [PATCH 3/3] ftrace: trace single pid for function graph tracer

On Wed, 03 Dec 2008 15:36:59 -0500
Steven Rostedt <rostedt@...dmis.org> wrote:

> This patch makes the changes to set_ftrace_pid apply to the function
> graph tracer.

That sentence needs help.

>  # echo $$ > /debugfs/tracing/set_ftrace_pid
>  # echo function_graph > /debugfs/tracing/current_tracer
> 
> Will cause only the current task to be traced. Note, the trace flags are
> also inherited by child processes, so the children of the shell
> will also be traced.

Where did we end up on the pids-arent-unique issue?  Gave up?
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