Re: [patch] x86: Fix /dev/mem mmap breakage when PAT is disabled

[Ravikiran G Thirumalai]

On Thu, Oct 30, 2008 at 01:21:03PM -0700, Arjan van de Ven wrote:
>On Wed, 29 Oct 2008 19:02:03 -0700
>Ravikiran G Thirumalai <kiran@xxxxxxxxxxxx> wrote:
>
>well... technically the aliases are bad without PAT as well...
>

Hmm! Well, you mean if mtrr is used to change attributes?

I guess there is always a risk associated with luser space mmaping /dev/mem,
and we have CONFIG_STRICT_DEVMEM to avoid this in production.
However, for debugging tools, it is worth having the capability in _debug_
kernels and living with the risk IMHO.

Thanks,
Kiran
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