linux-kernel - Re: [patch 0/5] Support for sanitization flag in low-level page allocator

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Message-ID: <20090531001548.571d7b59@lxorguk.ukuu.org.uk>
Date:	Sun, 31 May 2009 00:15:48 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Rik van Riel <riel@...hat.com>,
	"Larry H." <research@...reption.com>,
	Pekka Enberg <penberg@...helsinki.fi>,
	linux-kernel@...r.kernel.org, Linus Torvalds <torvalds@...l.org>,
	linux-mm@...ck.org, Ingo Molnar <mingo@...hat.com>,
	pageexec@...email.hu,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [patch 0/5] Support for sanitization flag in low-level page
 allocator

> Obviously the argument is best settled by measurements. Done by 
> whoever wants to push this code.

How do you measure security as a mathematical quantity in a benchtest ?

In terms of performance its pretty easy to stick a counter in kzfree in
2.6.30-rc. The number that comes up is very very low.

Alan
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