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Date: Tue, 27 Mar 2007 13:00:54 -0400
From: "Mike Frysinger" <vapier.adi@gmail.com>
To: "David Howells" <dhowells@redhat.com>
Subject: Re: [PATCH -mm] Revoke core code: fix nommu arch compiling error bug
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       "Andrew Morton" <akpm@linux-foundation.org>, bryan.wu@analog.com,
       linux-kernel@vger.kernel.org, "Hugh Dickins" <hugh@veritas.com>,
       "Alan Cox" <alan@lxorguk.ukuu.org.uk>
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On 3/27/07, David Howells <dhowells@redhat.com> wrote:
> Note that it's not possible to shift windows around in response to faults
> because fault reporting is asynchronous - the entire remaining instruction
> queue will be executed *before* the exception is actually raised to the
> kernel.

ah that would limit the usefulness of its application in the kernel
... thanks for the info

> That sounds reasonable.  However, I suspect that most NOMMU CPUs won't be able
> to do that.  In effect you're creating a third option, I think (MMU, NOMMU,
> MPU).

sure, but i'm not sure the MPU option would be mutually exclusive with
NOMMU ... in the Blackfin case, we'd want both ...
-mike