linux-kernel - Re: [RFC Patch] kcore: restrict access to the whole memory

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Date:	Wed, 22 Dec 2010 15:02:09 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Amerigo Wang <amwang@...hat.com>
Cc:	linux-kernel@...r.kernel.org, Neil Horman <nhorman@...driver.com>,
	WANG Cong <xiyou.wangcong@...il.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Wu Fengguang <fengguang.wu@...el.com>,
	Dan Carpenter <error27@...il.com>, Tejun Heo <tj@...nel.org>
Subject: Re: [RFC Patch] kcore: restrict access to the whole memory

On Wed, 22 Dec 2010 19:21:59 +0800
Amerigo Wang <amwang@...hat.com> wrote:

> This patch restricts /proc/kcore from accessing the whole memory,
> instead, only an ELF header can be read.
> 
> The initial patch was done by Vivek.

Getting a bit tired of this.

Are we supposed to be mind-readers?  How else are we to work out why
you think Linux needs this feature?  What problems it solves?  What
applications are expected to break and what the breakage patterns are? 
Why the benefits are worth the maintenance costs and the risk of
breakage?  Why it's done with a config option and not a boot-time or
runtime tunable?

c'mon, you guys have been around long enough to understand this stuff.
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