From: Srikar Dronamraju Date: Sat, 10 Sep 2016 10:34:10 +0000 (+1000) Subject: mm/memblock.c: expose total reserved memory X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=74e70f7f797171a1e0e1cfcc1d2966d28033f291;p=deliverable%2Flinux.git 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 Suggested-by: Mel Gorman Cc: Vlastimil Babka Cc: Michal Hocko Cc: Michael Ellerman Cc: Mahesh Salgaonkar Cc: Hari Bathini Cc: Dave Hansen Cc: Balbir Singh Cc: Benjamin Herrenschmidt Signed-off-by: Andrew Morton --- 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;