linux-kernel - [PATCH v3 3/3] arm64: mm: Re-enable OPTIMIZE_HUGETLB

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Date: Sat, 13 Jan 2024 17:44:36 +0800
From: Nanyong Sun <sunnanyong@...wei.com>
To: <catalin.marinas@....com>, <will@...nel.org>, <mike.kravetz@...cle.com>,
	<muchun.song@...ux.dev>, <akpm@...ux-foundation.org>,
	<anshuman.khandual@....com>
CC: <willy@...radead.org>, <wangkefeng.wang@...wei.com>,
	<sunnanyong@...wei.com>, <linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>, <linux-mm@...ck.org>
Subject: [PATCH v3 3/3] arm64: mm: Re-enable OPTIMIZE_HUGETLB_VMEMMAP

Now update of vmemmap page table can follow the rule of
break-before-make safely for arm64 architecture, re-enable
HVO on arm64.

Signed-off-by: Nanyong Sun <sunnanyong@...wei.com>
Reviewed-by: Muchun Song <songmuchun@...edance.com>
---
 arch/arm64/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 8f6cf1221b6a..bd37a7ed32f2 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -104,6 +104,7 @@ config ARM64
 	select ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT
 	select ARCH_WANT_FRAME_POINTERS
 	select ARCH_WANT_HUGE_PMD_SHARE if ARM64_4K_PAGES || (ARM64_16K_PAGES && !ARM64_VA_BITS_36)
+	select ARCH_WANT_OPTIMIZE_HUGETLB_VMEMMAP
 	select ARCH_WANT_LD_ORPHAN_WARN
 	select ARCH_WANTS_NO_INSTR
 	select ARCH_WANTS_THP_SWAP if ARM64_4K_PAGES
-- 
2.25.1