linux-kernel - Re: [PATCH 3/4] tracing: add schedule events to event trace

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Message-Id: <1235543360.4645.2912.camel@laptop>
Date:	Wed, 25 Feb 2009 07:29:20 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...e.hu>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Theodore Tso <tytso@....edu>,
	Arjan van de Ven <arjan@...radead.org>,
	Pekka Paalanen <pq@....fi>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Jason Baron <jbaron@...hat.com>,
	Martin Bligh <mbligh@...gle.com>,
	Mathieu Desnoyers <compudj@...stal.dyndns.org>,
	"Frank Ch. Eigler" <fche@...hat.com>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Jens Axboe <jens.axboe@...cle.com>,
	Masami Hiramatsu <mhiramat@...hat.com>,
	Steven Rostedt <srostedt@...hat.com>
Subject: Re: [PATCH 3/4] tracing: add schedule events to event trace

On Tue, 2009-02-24 at 21:56 -0500, Steven Rostedt wrote:
> +DEFINE_TRACE_FMT(sched_switch,
> +       TPPROTO(struct rq *rq, struct task_struct *prev,
> +               struct task_struct *next),
> +       TPARGS(rq, prev, next),
> +       TPFMT("task %s:%d ==> %s:%d",
> +             prev->comm, prev->pid, next->comm, next->pid));

Why add tehe "task" string to the left hand task, but not the right hand
one?

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