On Tue, Dec 12, 2017 at 07:56:44AM -0800, Andy Lutomirski wrote: > This patch shrinks vmalloc space from 16384TiB to 12800TiB to > enlarge the hole starting at 0xff90000000000000 to be a full PGD > entry. > > A subsequent patch will use this hole for the pagetable isolation > LDT alias. > > Cc: "Kirill A. Shutemov" <kir...@shutemov.name> > Cc: Dave Hansen <dave.han...@intel.com> > Signed-off-by: Andy Lutomirski <l...@kernel.org> > --- > Documentation/x86/x86_64/mm.txt | 4 ++-- > arch/x86/include/asm/pgtable_64_types.h | 4 ++-- > 2 files changed, 4 insertions(+), 4 deletions(-) > > diff --git a/Documentation/x86/x86_64/mm.txt b/Documentation/x86/x86_64/mm.txt > index 63a41671d25b..6a28aeaccd53 100644 > --- a/Documentation/x86/x86_64/mm.txt > +++ b/Documentation/x86/x86_64/mm.txt > @@ -28,8 +28,8 @@ Virtual memory map with 5 level page tables: > hole caused by [56:63] sign extension > ff00000000000000 - ff0fffffffffffff (=52 bits) guard hole, reserved for > hypervisor > ff10000000000000 - ff8fffffffffffff (=55 bits) direct mapping of all phys. > memory > -ff90000000000000 - ff91ffffffffffff (=49 bits) hole > -ff92000000000000 - ffd1ffffffffffff (=54 bits) vmalloc/ioremap space > +ff90000000000000 - ff9fffffffffffff (=52 bits) hole > +ffa0000000000000 - ffd1ffffffffffff (=54 bits) vmalloc/ioremap space
It's not 54 bits anymore. -- Kirill A. Shutemov
