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

H. Peter Anvin hpa at zytor.com
Mon Jun 20 12:44:25 EDT 2011

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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