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authorSrikar Dronamraju <srikar@linux.vnet.ibm.com>2016-10-07 16:59:18 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2016-10-07 18:46:28 -0700
commit8907de5dc6e9d5925cf3b0a698cc3a4272fda073 (patch)
tree8fa6fca9d4bca76358f73044638e3f68fab4bbad
parentf6f34b4387d9e18304451a131b35d7c4f27a0b5a (diff)
downloadlinux-8907de5dc6e9d5925cf3b0a698cc3a4272fda073.tar.bz2
mm/memblock.c: expose total reserved memory
The total reserved memory in a system is accounted but not available for use use outside mm/memblock.c. By exposing the total reserved memory, systems can better calculate the size of large hashes. Link: http://lkml.kernel.org/r/1472476010-4709-3-git-send-email-srikar@linux.vnet.ibm.com Signed-off-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com> Suggested-by: Mel Gorman <mgorman@techsingularity.net> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Michal Hocko <mhocko@kernel.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> Cc: Hari Bathini <hbathini@linux.vnet.ibm.com> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Balbir Singh <bsingharora@gmail.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--include/linux/memblock.h1
-rw-r--r--mm/memblock.c5
2 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/memblock.h b/include/linux/memblock.h
index 2925da23505d..5b759c9acf97 100644
--- a/include/linux/memblock.h
+++ b/include/linux/memblock.h
@@ -328,6 +328,7 @@ phys_addr_t memblock_alloc_base(phys_addr_t size, phys_addr_t align,
phys_addr_t __memblock_alloc_base(phys_addr_t size, phys_addr_t align,
phys_addr_t max_addr);
phys_addr_t memblock_phys_mem_size(void);
+phys_addr_t memblock_reserved_size(void);
phys_addr_t memblock_mem_size(unsigned long limit_pfn);
phys_addr_t memblock_start_of_DRAM(void);
phys_addr_t memblock_end_of_DRAM(void);
diff --git a/mm/memblock.c b/mm/memblock.c
index 483197ef613f..c8dfa430342b 100644
--- a/mm/memblock.c
+++ b/mm/memblock.c
@@ -1438,6 +1438,11 @@ phys_addr_t __init_memblock memblock_phys_mem_size(void)
return memblock.memory.total_size;
}
+phys_addr_t __init_memblock memblock_reserved_size(void)
+{
+ return memblock.reserved.total_size;
+}
+
phys_addr_t __init memblock_mem_size(unsigned long limit_pfn)
{
unsigned long pages = 0;