The patch titled
Subject: mm/memblock.c: expose total reserved memory
has been added to the -mm tree. Its filename is
mm-memblock-expose-total-reserved-memory.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-memblock-expose-total-reserved-memory.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-memblock-expose-total-reserved-memory.patch
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------------------------------------------------------
From: Srikar Dronamraju <srikar@xxxxxxxxxxxxxxxxxx>
Subject: 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@xxxxxxxxxxxxxxxxxx
Signed-off-by: Srikar Dronamraju <srikar@xxxxxxxxxxxxxxxxxx>
Suggested-by: Mel Gorman <mgorman@xxxxxxxxxxxxxxxxxxx>
Cc: Vlastimil Babka <vbabka@xxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxxxx>
Cc: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Cc: Mahesh Salgaonkar <mahesh@xxxxxxxxxxxxxxxxxx>
Cc: Hari Bathini <hbathini@xxxxxxxxxxxxxxxxxx>
Cc: Dave Hansen <dave.hansen@xxxxxxxxx>
Cc: Balbir Singh <bsingharora@xxxxxxxxx>
Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/memblock.h | 1 +
mm/memblock.c | 5 +++++
2 files changed, 6 insertions(+)
diff -puN include/linux/memblock.h~mm-memblock-expose-total-reserved-memory include/linux/memblock.h
--- a/include/linux/memblock.h~mm-memblock-expose-total-reserved-memory
+++ a/include/linux/memblock.h
@@ -328,6 +328,7 @@ phys_addr_t memblock_alloc_base(phys_add
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 -puN mm/memblock.c~mm-memblock-expose-total-reserved-memory mm/memblock.c
--- a/mm/memblock.c~mm-memblock-expose-total-reserved-memory
+++ a/mm/memblock.c
@@ -1438,6 +1438,11 @@ phys_addr_t __init_memblock memblock_phy
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;
_
Patches currently in -mm which might be from srikar@xxxxxxxxxxxxxxxxxx are
mm-page_alloc-replace-set_dma_reserve-to-set_memory_reserve.patch
fadump-register-the-memory-reserved-by-fadump.patch
mm-introduce-arch_reserved_kernel_pages.patch
mm-memblock-expose-total-reserved-memory.patch
powerpc-implement-arch_reserved_kernel_pages.patch
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