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Date: Fri, 4 Dec 2020 09:44:43 +0800 From: Wei Li <liwei213@...wei.com> To: <catalin.marinas@....com>, <rppt@...ux.ibm.com>, <will@...nel.org>, <liwei213@...wei.com> CC: <fengbaopeng2@...ilicon.com>, <nsaenzjulienne@...e.de>, <steve.capper@....com>, <song.bao.hua@...ilicon.com>, <linux-arm-kernel@...ts.infradead.org>, <linux-kernel@...r.kernel.org>, <butao@...ilicon.com> Subject: [PATCH] arm64: mm: decrease the section size to reduce the memory reserved for the page map 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@...wei.com> Signed-off-by: Baopeng Feng <fengbaopeng2@...ilicon.com> Signed-off-by: Xia Qing <saberlily.xia@...ilicon.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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