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SubjectRe: [patch]VMSPLIT_2G conflicts with PAE

>> PAGE_OFFSET is 0x78000000 with VMSPLIT_2G, this address is in the middle
>> of the second pgd entry with pae enabled. This breaks assumptions
>> (address is aligned to pgd entry's address) in a lot of places like
>> pagetable_init. Fixing the assumptions is hard (eg, low mapping). SO I
>> just changed the address to 0x80000000.
>Do we allow user entering arbitrary value here? In any case, it would
>be nice to document alignment requirements of this one, because
>otherwise someone *will* get it wrong.

There was a reason 0x78000000 was chosen

Though further back in
0x80000000 was indeed posted.

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