linux-kernel - Re: [PATCH 2/2] Add dev.mem.restricted sysctl

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Message-ID: <20081116000738.5c70daf5@lxorguk.ukuu.org.uk>
Date:	Sun, 16 Nov 2008 00:07:38 +0000
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Bernhard Walle <bwalle@...e.de>
Cc:	x86@...nel.org, linux-kernel@...r.kernel.org,
	linux-arch@...r.kernel.org, Bernhard Walle <bwalle@...e.de>
Subject: Re: [PATCH 2/2] Add dev.mem.restricted sysctl

On Sun, 16 Nov 2008 01:03:43 +0100
Bernhard Walle <bwalle@...e.de> wrote:

> When CONFIG_STRICT_DEVMEM is set, live debugging is not possible with the
> crash utility (see http://people.redhat.com/~anderson). For distributors
> who ship a generic kernel it's difficult: Disabling CONFIG_STRICT_DEVMEM
> is possible, but in general the protection provided by CONFIG_STRICT_DEVMEM
> is useful. However, live debugging should be still neceessary.

Why not just turn strictmem off - as you've correctly demonstrated its
completely useless and always was.

A switchable configurable piece of turd is still at the end of the day a
piece of turd.

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