Message-ID: <4CE55D15.1020908@linux.intel.com>
Date: Thu, 18 Nov 2010 09:06:29 -0800
From: Darren Hart <dvhart@linux.intel.com>
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To: Ingo Molnar <mingo@elte.hu>
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
References: <alpine.LFD.2.00.1011162103580.2900@localhost6.localdomain6> <4CE38C53.8090606@kernel.org> <20101117120740.GA24972@elte.hu> <4CE47ED0.7080901@linux.intel.com> <20101118085513.GH26398@elte.hu>
In-Reply-To: <20101118085513.GH26398@elte.hu>
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On 11/18/2010 12:55 AM, Ingo Molnar wrote:
>
> * 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);
> 	}


I think that would be ideal.

-- 
Darren Hart
Yocto Linux Kernel
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