Re: [PATCH 00/10] Enhance /dev/mem to allow read/write of arbitraryphysical addresses

From: H. Peter Anvin
Date: Mon Jun 20 2011 - 12:47:42 EST

On 06/20/2011 09:40 AM, Ingo Molnar wrote:
> There is no reason why they couldnt use a .config option or a boot
> option to get their weird stuff going, which weird stuff also happens
> to be useful.
> What i'm somewhat against is having this enabled by default for weird
> stuff that also happens to be harmful - and the fact that it never
> worked over 4G physical gives us the perfect opportunity to do just
> that.

I'm concerned about that notion. I think it's fine to modularize
/dev/mem, but what we're seeing is that Red Hat and all kinds of other
entities are putting in ad hoc versions of /dev/mem, but of course doing
so incorrectly.


H. Peter Anvin, Intel Open Source Technology Center
I work for Intel. I don't speak on their behalf.

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