PV i386 patch

[Alan Cox]

On 12/20/2011 07:28, Sean Bruno wrote:
>> The code that panics shouldn't even exist in the Xen pmap.  Try the
>> attached patch.
>>
>> Alan
>>
> Indeed .... how on earth did we ever use this stuff?  :-)
>
> Tested to 2G on ref9-xen32.f.o .... should I go any higher?

Sure.  Right now, I don't know of any reason that it should crash with 
more memory.  :-)

Do either of you know if there is a PR in gnats for this 768 MB 
limitation bug that I should mention in the commit log?

Alan