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| author | Stephen Rothwell <sfr@canb.auug.org.au> | 2019-05-09 10:44:09 +1000 |
|---|---|---|
| committer | Jonathan Corbet <corbet@lwn.net> | 2019-05-10 09:17:54 -0600 |
| commit | 730dae8e8aa29fe5f1d0394cd27b6c1239507f96 (patch) | |
| tree | 5c3de9e35b3744b2a67d5d419bb4c5302b77daf4 | |
| parent | c85c1c6be4e38da0c7690b99afca1a1891b3c695 (diff) | |
| download | lwn-730dae8e8aa29fe5f1d0394cd27b6c1239507f96.tar.gz lwn-730dae8e8aa29fe5f1d0394cd27b6c1239507f96.zip | |
Documentation/x86: Carry over memory-map fix from mm.txtdocs-5.2a-merge
Commit 89502a019790 (x86/mm: Fix the 56-bit addresses memory map in
Documentation/x86/x86_64/mm.txt) was lost in the RST conversion of mm.txt,
so put it back.
Originally-by: Stephen Kitt <steve@sk2.org>
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
| -rw-r--r-- | Documentation/x86/x86_64/mm.rst | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/Documentation/x86/x86_64/mm.rst b/Documentation/x86/x86_64/mm.rst index 52020577b8de..267fc4808945 100644 --- a/Documentation/x86/x86_64/mm.rst +++ b/Documentation/x86/x86_64/mm.rst @@ -78,7 +78,7 @@ Complete virtual memory map with 5-level page tables .. note:: - With 56-bit addresses, user-space memory gets expanded by a factor of 512x, - from 0.125 PB to 64 PB. All kernel mappings shift down to the -64 PT starting + from 0.125 PB to 64 PB. All kernel mappings shift down to the -64 PB starting offset and many of the regions expand to support the much larger physical memory supported. @@ -91,7 +91,7 @@ Complete virtual memory map with 5-level page tables 0000000000000000 | 0 | 00ffffffffffffff | 64 PB | user-space virtual memory, different per mm __________________|____________|__________________|_________|___________________________________________________________ | | | | - 0000800000000000 | +64 PB | ffff7fffffffffff | ~16K PB | ... huge, still almost 64 bits wide hole of non-canonical + 0100000000000000 | +64 PB | feffffffffffffff | ~16K PB | ... huge, still almost 64 bits wide hole of non-canonical | | | | virtual memory addresses up to the -64 PB | | | | starting offset of kernel mappings. __________________|____________|__________________|_________|___________________________________________________________ @@ -107,7 +107,7 @@ Complete virtual memory map with 5-level page tables ffd2000000000000 | -11.5 PB | ffd3ffffffffffff | 0.5 PB | ... unused hole ffd4000000000000 | -11 PB | ffd5ffffffffffff | 0.5 PB | virtual memory map (vmemmap_base) ffd6000000000000 | -10.5 PB | ffdeffffffffffff | 2.25 PB | ... unused hole - ffdf000000000000 | -8.25 PB | fffffdffffffffff | ~8 PB | KASAN shadow memory + ffdf000000000000 | -8.25 PB | fffffbffffffffff | ~8 PB | KASAN shadow memory __________________|____________|__________________|_________|____________________________________________________________ | | Identical layout to the 47-bit one from here on: |