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SubjectRe: [RFC, PATCHv1 17/28] x86/mm: define virtual memory map for 5-level paging
On Thu, Dec 08, 2016 at 10:56:04AM -0800, Randy Dunlap wrote:
> > @@ -23,6 +23,27 @@ ffffffffa0000000 - ffffffffff5fffff (=1526 MB) module mapping space
> > ffffffffff600000 - ffffffffffdfffff (=8 MB) vsyscalls
> > ffffffffffe00000 - ffffffffffffffff (=2 MB) unused hole
> >
> > +Virtual memory map with 5 level page tables:
> > +
> > +0000000000000000 - 00ffffffffffffff (=56 bits) user space, different per mm
> > +hole caused by [57:63] sign extension
>
> Can you briefly explain the sign extension?

Sure, I'll update it on respin.

> Should that be [56:63]?

You're right, it should.

Thanks for all your corrections.

--
Kirill A. Shutemov

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