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authorIgor Mammedov <imammedo@redhat.com>2015-12-04 14:07:05 +0100
committerIngo Molnar <mingo@kernel.org>2015-12-06 12:46:31 +0100
commit8dd3303001976aa8583bf20f6b93590c74114308 (patch)
tree50e206f228cc3f8cd4958fd1f0025417b2848a9c /mm
parent071ac0c4e8e90d5de05f0779b03ae69ce84820d5 (diff)
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.c1
-rw-r--r--mm/nobootmem.c1
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)