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From: Nanyong Sun <sunnanyong@huawei.com>
To: <catalin.marinas@arm.com>, <will@kernel.org>, <mike.kravetz@oracle.com>,
	<muchun.song@linux.dev>, <akpm@linux-foundation.org>,
	<anshuman.khandual@arm.com>
CC: <willy@infradead.org>, <wangkefeng.wang@huawei.com>,
	<sunnanyong@huawei.com>, <linux-arm-kernel@lists.infradead.org>,
	<linux-kernel@vger.kernel.org>, <linux-mm@kvack.org>
Subject: [PATCH v2 3/3] arm64: mm: Re-enable OPTIMIZE_HUGETLB_VMEMMAP
Date: Wed, 20 Dec 2023 13:18:55 +0800
Message-ID: <20231220051855.47547-4-sunnanyong@huawei.com>
In-Reply-To: <20231220051855.47547-1-sunnanyong@huawei.com>
References: <20231220051855.47547-1-sunnanyong@huawei.com>
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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@huawei.com>
Reviewed-by: Muchun Song <songmuchun@bytedance.com>
---
 arch/arm64/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 7b071a00425d..43e3d5576fb2 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -103,6 +103,7 @@ 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