Re: [RFC, PATCHv1 17/28] x86/mm: define virtual memory map for 5-level paging

[Kirill A. Shutemov]

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