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Subject[PATCH] arm64: mm: decrease the section size to reduce the memory reserved for the page map
Date
For the memory hole, sparse memory model that define SPARSEMEM_VMEMMAP
do not free the reserved memory for the page map, decrease the section
size can reduce the waste of reserved memory.

Signed-off-by: Wei Li <liwei213@huawei.com>
Signed-off-by: Baopeng Feng <fengbaopeng2@hisilicon.com>
Signed-off-by: Xia Qing <saberlily.xia@hisilicon.com>
---
arch/arm64/include/asm/sparsemem.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/include/asm/sparsemem.h b/arch/arm64/include/asm/sparsemem.h
index 1f43fcc79738..8963bd3def28 100644
--- a/arch/arm64/include/asm/sparsemem.h
+++ b/arch/arm64/include/asm/sparsemem.h
@@ -7,7 +7,7 @@

#ifdef CONFIG_SPARSEMEM
#define MAX_PHYSMEM_BITS CONFIG_ARM64_PA_BITS
-#define SECTION_SIZE_BITS 30
+#define SECTION_SIZE_BITS 27
#endif

#endif
--
2.15.0
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