linux-kernel - Re: [PATCH prototype] [0/8] Predictive bitmaps for ELF executables

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Message-ID: <20080318172045.GI11966@one.firstfloor.org>
Date:	Tue, 18 Mar 2008 18:20:45 +0100
From:	Andi Kleen <andi@...stfloor.org>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Andi Kleen <andi@...stfloor.org>, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org
Subject: Re: [PATCH prototype] [0/8] Predictive bitmaps for ELF executables

> What's the permission problem?  executable-but-not-readable files?  Could

Not writable. 

> be handled by passing your request to a suitable-privileged server process,
> I guess.

Yes it could, but i dont even want to thi nk about all the issues of
doing such an interface. It is basically an microkernelish approach.
I prefer monolithic simplicity.

e.g. i am pretty sure your user space implementation would be far
more complicated than a nicely streamlined kernel implementation. 
And I am really not a friend of unnecessary complexity. In the end
complexity hurts you, no matter if it is in ring 3 or ring 0.

-Andi
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