linux-kernel - Re: [PATCH 1/5] ftrace: add function tracing to single thread

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Date:	Wed, 26 Nov 2008 07:54:25 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>
Cc:	Steven Rostedt <rostedt@...dmis.org>, linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	containers@...ts.osdl.org,
	Sukadev Bhattiprolu <sukadev@...ux.vnet.ibm.com>,
	"Serge E. Hallyn" <serue@...ibm.com>,
	Steven Rostedt <srostedt@...hat.com>
Subject: Re: [PATCH 1/5] ftrace: add function tracing to single thread


* Eric W. Biederman <ebiederm@...ssion.com> wrote:

> > +/* ftrace_pid_trace >= 0 will only trace threads with this pid */
> > +static int ftrace_pid_trace = -1;
> 
> Why not?
> static struct pid *ftrace_pid_trace = NULL;

ok, looks reasonably simple at first sight.

Steve, mind sending the conversion of this facility to struct pid as a 
delta patch? (that would have education purposes as well, for similar 
situations)

	Ingo
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