linux-kernel - Re: [PATCH 1/5] Revert "kmemtrace: fix printk format warnings"

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Message-ID: <48AB1E43.2010408@cs.helsinki.fi>
Date:	Tue, 19 Aug 2008 22:25:55 +0300
From:	Pekka Enberg <penberg@...helsinki.fi>
To:	Eduard - Gabriel Munteanu <eduard.munteanu@...ux360.ro>
CC:	Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>,
	"Randy.Dunlap" <rdunlap@...otime.net>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org, mpm@...enic.com,
	tglx@...utronix.de, rostedt@...dmis.org, cl@...ux-foundation.org,
	tzanussi@...il.com
Subject: Re: [PATCH 1/5] Revert "kmemtrace: fix printk format warnings"

Eduard - Gabriel Munteanu wrote:
> On Tue, Aug 19, 2008 at 02:16:53PM -0400, Mathieu Desnoyers wrote:
>> Question :
>>
>> Is this kmemtrace marker meant to be exposed to userspace ?
>>
>> I suspect not. In all case, not directly. I expect in-kernel probes to
>> be connected on these markers which will get the arguments they need,
>> and maybe access the inner data structures. Anyhow, tracepoints should
>> be used for that, not markers. You can later put markers in the probes
>> which are themselves connected to tracepoints.
>>
>> Tracepoints = in-kernel tracing API.
>>
>> Markers = Data-formatting tracing API, meant to export the data either
>> to user-space in text or binary format.
>>
>> See
>>
>> http://git.kernel.org/?p=linux/kernel/git/compudj/linux-2.6-lttng.git;a=shortlog
>>
>> tracepoint-related patches.
> 
> I think we're ready to try tracepoints. Pekka, could you merge Mathieu's
> tracepoints or otherwise provide a branch where I could submit a
> tracepoint conversion patch for kmemtrace?

Sorry, that's too much of a hassle for me. I'll happily take your 
conversion patch once tracepoints hit mainline. Mathieu, are you aiming 
for 2.6.28?
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