Re: [discuss] [patch] mtrr: fix issues with large addresses

Jan Beulich
2007-02-06T09:30:01Z

>>> Andi Kleen <ak@suse.de> 06.02.07 08:53 >>>
>On Monday 05 February 2007 23:50, Siddha, Suresh B wrote:
>> On Mon, Feb 05, 2007 at 06:19:59PM +0100, Andreas Herrmann wrote:
>> > o added check to restrict base address to 36 bit on i386
>>
>> Why is this? It can go upto implemented physical bits, right?
>
>In theory it can, but Linux doesn't support it.

I don't think I remember a restriction here, at least not below 44 bits
(that's where pfn-s would need to become 64-bit wide).

Jan