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| author |   Igor Mammedov <imammedo@redhat.com> | 2015-12-04 14:07:05 +0100 |
|---|---|---|
| committer |   Ingo Molnar <mingo@kernel.org> | 2015-12-06 12:46:31 +0100 |
| commit | 8dd3303001976aa8583bf20f6b93590c74114308 (patch) | |
| tree | 50e206f228cc3f8cd4958fd1f0025417b2848a9c /include/linux/bootmem.h | |
| parent | x86/mm/ptdump: Make (debugfs)/kernel_page_tables read-only (diff) | |
| download | linux-dev-8dd3303001976aa8583bf20f6b93590c74114308.tar.xz linux-dev-8dd3303001976aa8583bf20f6b93590c74114308.zip | |
x86/mm: Introduce max_possible_pfn
max_possible_pfn will be used for tracking max possible
PFN for memory that isn't present in E820 table and
could be hotplugged later.
By default max_possible_pfn is initialized with max_pfn,
but later it could be updated with highest PFN of
hotpluggable memory ranges declared in ACPI SRAT table
if any present.
Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: akataria@vmware.com
Cc: fujita.tomonori@lab.ntt.co.jp
Cc: konrad.wilk@oracle.com
Cc: pbonzini@redhat.com
Cc: revers@redhat.com
Cc: riel@redhat.com
Link: http://lkml.kernel.org/r/1449234426-273049-2-git-send-email-imammedo@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'include/linux/bootmem.h')
| -rw-r--r-- | include/linux/bootmem.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/bootmem.h b/include/linux/bootmem.h index f589222bfa87..35b22f94d2d2 100644 --- a/include/linux/bootmem.h +++ b/include/linux/bootmem.h @@ -19,6 +19,10 @@ extern unsigned long min_low_pfn; * highest page */ extern unsigned long max_pfn; +/* + * highest possible page + */ +extern unsigned long long max_possible_pfn; #ifndef CONFIG_NO_BOOTMEM /* |