Date: Thu, 18 Nov 2010 09:55:13 +0100
From: Ingo Molnar <mingo@elte.hu>
To: Darren Hart <dvhart@linux.intel.com>
Cc: Pekka Enberg <penberg@kernel.org>, Thomas Gleixner <tglx@linutronix.de>,
        Peter Zijlstra <peterz@infradead.org>,
        Steven Rostedt <rostedt@goodmis.org>,
        Arjan van de Ven <arjan@linux.intel.com>,
        Arnaldo Carvalho de Melo <acme@redhat.com>,
        Frederic Weisbecker <fweisbec@gmail.com>, linux-kernel@vger.kernel.org,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        Arjan van de Ven <arjan@infradead.org>
Subject: Re: [patch] trace: Add user-space event tracing/injection
Message-ID: <20101118085513.GH26398@elte.hu>
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 <20101117120740.GA24972@elte.hu>
 <4CE47ED0.7080901@linux.intel.com>
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* Darren Hart <dvhart@linux.intel.com> wrote:

> Ideally I would like to see something just like trace_printf()
> without having to define it myself in each of my testcases. [...]

We can make the prctl a single-argument thing, at the cost of not allowing \0 in the 
content. (which is probably sane anyway)

That way deployment is super-simple:

	prctl(35, "My Trace Message");
	...


	if (asprintf(&msg, "My Trace Message: %d\n", 1234) != -1) {
		prctl(35, *msg);
		free(*msg);
	}

Thanks,

	Ingo
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