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| author | Ingo Molnar <mingo@kernel.org> | 2016-04-22 10:12:19 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2016-04-22 10:13:53 +0200 |
| commit | b2eafe890d4a09bfa63ab31ff018d7d6bb8cfefc (patch) | |
| tree | 260890790538b5dffc49bc9ee607d808a6e47b98 /Documentation/x86 | |
| parent | abfb9498ee1327f534df92a7ecaea81a85913bae (diff) | |
| parent | ea5dfb5fae81939f777ca569d8cfb599252da2e8 (diff) | |
| download | lwn-b2eafe890d4a09bfa63ab31ff018d7d6bb8cfefc.tar.gz lwn-b2eafe890d4a09bfa63ab31ff018d7d6bb8cfefc.zip | |
Merge branch 'x86/urgent' into x86/asm, to fix semantic conflict
'cpu_has_pse' has changed to boot_cpu_has(X86_FEATURE_PSE), fix this
up in the merge commit when merging the x86/urgent tree that includes
the following commit:
103f6112f253 ("x86/mm/xen: Suppress hugetlbfs in PV guests")
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'Documentation/x86')
| -rw-r--r-- | Documentation/x86/x86_64/mm.txt | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/Documentation/x86/x86_64/mm.txt b/Documentation/x86/x86_64/mm.txt index c518dce7da4d..5aa738346062 100644 --- a/Documentation/x86/x86_64/mm.txt +++ b/Documentation/x86/x86_64/mm.txt @@ -19,7 +19,7 @@ ffffff0000000000 - ffffff7fffffffff (=39 bits) %esp fixup stacks ffffffef00000000 - ffffffff00000000 (=64 GB) EFI region mapping space ... unused hole ... ffffffff80000000 - ffffffffa0000000 (=512 MB) kernel text mapping, from phys 0 -ffffffffa0000000 - ffffffffff5fffff (=1525 MB) module mapping space +ffffffffa0000000 - ffffffffff5fffff (=1526 MB) module mapping space ffffffffff600000 - ffffffffffdfffff (=8 MB) vsyscalls ffffffffffe00000 - ffffffffffffffff (=2 MB) unused hole @@ -31,8 +31,8 @@ vmalloc space is lazily synchronized into the different PML4 pages of the processes using the page fault handler, with init_level4_pgt as reference. -Current X86-64 implementations only support 40 bits of address space, -but we support up to 46 bits. This expands into MBZ space in the page tables. +Current X86-64 implementations support up to 46 bits of address space (64 TB), +which is our current limit. This expands into MBZ space in the page tables. We map EFI runtime services in the 'efi_pgd' PGD in a 64Gb large virtual memory window (this size is arbitrary, it can be raised later if needed). |