Messages in this thread | | | From | Andy Lutomirski <> | Date | Wed, 13 Dec 2017 09:04:51 -0800 | Subject | Re: [PATCH PTI v3 09/10] x86/mm/64: Make a full PGD-entry size hole in the memory map |
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Whoops. I'll change that to "(=12800 TB)".
On Wed, Dec 13, 2017 at 5:17 AM, Kirill A. Shutemov <kirill@shutemov.name> wrote: > 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" <kirill@shutemov.name> >> Cc: Dave Hansen <dave.hansen@intel.com> >> Signed-off-by: Andy Lutomirski <luto@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
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