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From: Mike Frysinger <vapier.adi@gmail.com>
Date: Sun, 13 Sep 2009 23:52:23 -0400
Message-ID: <8bd0f97a0909132052k258eee3fsbb5041fa1d338602@mail.gmail.com>
Subject: Re: [PATCH v2] NOMMU: add support for Memory Protection Units (MPU)
To: David Howells <dhowells@redhat.com>
Cc: linux-kernel@vger.kernel.org, uclinux-dist-devel@blackfin.uclinux.org,
       Bernd Schmidt <bernds_cb1@t-online.de>, Bryan Wu <cooloney@kernel.org>
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On Tue, Jul 14, 2009 at 13:14, Mike Frysinger wrote:
> From: Bernd Schmidt <bernds_cb1@t-online.de>
>
> Some architectures (like the Blackfin arch) implement some of the
> "simpler" features that one would expect out of a MMU such as memory
> protection.  In our case, we actually get read/write/exec protection
> down to the page boundary so processes can't stomp on each other let
> alone the kernel.  There is a performance decrease (which depends greatly
> on the workload) however as the hardware/software interaction was not
> optimized at design time.

David: anything else need to be done here or can we merge things ?
-mike
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