linux-kernel - Re: [Security] [PATCH] proc: avoid information leaks to non-privileged processes

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Message-ID: <20090506162543.GT31071@waste.org>
Date:	Wed, 6 May 2009 11:25:43 -0500
From:	Matt Mackall <mpm@...enic.com>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Arjan van de Ven <arjan@...radead.org>,
	Jake Edge <jake@....net>, security@...nel.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	James Morris <jmorris@...ei.org>,
	linux-security-module@...r.kernel.org,
	Eric Paris <eparis@...hat.com>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Roland McGrath <roland@...hat.com>, mingo@...hat.com,
	Andrew Morton <akpm@...ux-foundation.org>,
	Greg KH <greg@...ah.com>, Dave Jones <davej@...hat.com>
Subject: Re: [Security] [PATCH] proc: avoid information leaks to non-privileged processes

On Wed, May 06, 2009 at 12:30:34PM +0200, Ingo Molnar wrote:
> (Also, obviously "only" covering 95% of the Linux systems has its 
> use as well. Most other architectures have their own cycle counters 
> as well.)

X86 might be 95% of desktop. But it's a small fraction of Linux
systems once you count cell phones, video players, TVs, cameras, GPS
devices, cars, routers, etc. almost none of which are x86-based. In
fact, just Linux cell phones (with about an 8% share of a 1.2billion
devices per year market) dwarf Linux desktops (maybe 5% of a
200m/y market).

-- 
Mathematics is the supreme nostalgia of our time.
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