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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 /mm | |
| 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 'mm')
| -rw-r--r-- | mm/bootmem.c | 1 | ||||
| -rw-r--r-- | mm/nobootmem.c | 1 |
2 files changed, 2 insertions, 0 deletions
diff --git a/mm/bootmem.c b/mm/bootmem.c index 3b6380784c28..91e32bc8517f 100644 --- a/mm/bootmem.c +++ b/mm/bootmem.c @@ -33,6 +33,7 @@ EXPORT_SYMBOL(contig_page_data); unsigned long max_low_pfn; unsigned long min_low_pfn; unsigned long max_pfn; +unsigned long long max_possible_pfn; bootmem_data_t bootmem_node_data[MAX_NUMNODES] __initdata; diff --git a/mm/nobootmem.c b/mm/nobootmem.c index e57cf24babd6..99feb2b07fc5 100644 --- a/mm/nobootmem.c +++ b/mm/nobootmem.c @@ -31,6 +31,7 @@ EXPORT_SYMBOL(contig_page_data); unsigned long max_low_pfn; unsigned long min_low_pfn; unsigned long max_pfn; +unsigned long long max_possible_pfn; static void * __init __alloc_memory_core_early(int nid, u64 size, u64 align, u64 goal, u64 limit) |