linux-kernel - Re: [patch 4/4] Markers Support for Proprierary Modules

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Date:	Thu, 20 Mar 2008 16:17:33 -0400
From:	fche@...hat.com (Frank Ch. Eigler)
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>,
	akpm@...ux-foundation.org, linux-kernel@...r.kernel.org,
	Jon Masters <jcm@...masters.org>, Jon Masters <jcm@...hat.com>,
	Rusty Russell <rusty@...tcorp.com.au>,
	Christoph Hellwig <hch@...radead.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [patch 4/4] Markers Support for Proprierary Modules


Ingo Molnar <mingo@...e.hu> writes:

>> There seems to be good arguments for markers to support proprierary 
>> modules. So I am throwing this one-liner in and let's see how people 
>> react. [...]
>
> ugh, this is unbelievably stupid move technically - so a very strong 
> NACK. Allowing marker use in unfixable modules (today it's placing 
> markers into unfixable modules, 

As the thread suggested, this can benefit us more than it benefits
them, because it may let us see more into the blobs.


> tomorrow it's marker use by such modules) has only one clear and
> predictable effect: it turns marker calls into essential ABIs [...]

The marker_probe_*register calls are already EXPORT_SYMBOL_GPL'd, so
that covers your "tomorrow" case.  NACK that all you like when/if
someone proposes changing that.

> [if the proprietary modules attach to kernel markers ...] then all
> the pressure is on those who _can_ fix their code - meaning the
> kernel subsystem maintainers that use [you mean: define] markers.

(In a way, it would be a nice problem to have.  At this moment, there
are still no markers actually committed within -mm nor -linus.)


- FChE
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