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Date: Wed, 6 May 2009 11:25:43 -0500
From: Matt Mackall <mpm@selenic.com>
To: Ingo Molnar <mingo@elte.hu>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>,
       Linus Torvalds <torvalds@linux-foundation.org>,
       Arjan van de Ven <arjan@infradead.org>, Jake Edge <jake@lwn.net>,
       security@kernel.org,
       Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
       James Morris <jmorris@namei.org>, linux-security-module@vger.kernel.org,
       Eric Paris <eparis@redhat.com>, Alan Cox <alan@lxorguk.ukuu.org.uk>,
       Roland McGrath <roland@redhat.com>, mingo@redhat.com,
       Andrew Morton <akpm@linux-foundation.org>, Greg KH <greg@kroah.com>,
       Dave Jones <davej@redhat.com>
Subject: Re: [Security] [PATCH] proc: avoid information leaks to non-privileged processes
Message-ID: <20090506162543.GT31071@waste.org>
References: <alpine.LFD.2.01.0905041159480.4983@localhost.localdomain> <20090504125124.0f469970@infradead.org> <m1vdogbows.fsf@fess.ebiederm.org> <alpine.LFD.2.01.0905041514350.4983@localhost.localdomain> <20090505055011.GE31071@waste.org> <20090505063156.GA24504@elte.hu> <m14ow0ynjm.fsf@fess.ebiederm.org> <20090505195246.GC21973@elte.hu> <20090505202219.GL31071@waste.org> <20090506103034.GA25203@elte.hu>
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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.