[PATCH 00/10] Enhance /dev/mem to allow read/write of arbitrary physical addresses

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.

	-hpa

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