linux-kernel - [RFC PATCH 4/4] arm64: mm: Re-enable OPTIMIZE_HUGETLB

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Message-ID: <20240806022114.3320543-5-yuzhao@google.com>
Date: Mon,  5 Aug 2024 20:21:14 -0600
From: Yu Zhao <yuzhao@...gle.com>
To: Catalin Marinas <catalin.marinas@....com>, Will Deacon <will@...nel.org>
Cc: Andrew Morton <akpm@...ux-foundation.org>, David Rientjes <rientjes@...gle.com>, 
	Douglas Anderson <dianders@...omium.org>, Frank van der Linden <fvdl@...gle.com>, 
	Mark Rutland <mark.rutland@....com>, Muchun Song <muchun.song@...ux.dev>, 
	Nanyong Sun <sunnanyong@...wei.com>, Yang Shi <yang@...amperecomputing.com>, 
	linux-arm-kernel@...ts.infradead.org, linux-mm@...ck.org, 
	linux-kernel@...r.kernel.org, Muchun Song <songmuchun@...edance.com>, 
	Yu Zhao <yuzhao@...gle.com>
Subject: [RFC PATCH 4/4] arm64: mm: Re-enable OPTIMIZE_HUGETLB_VMEMMAP

From: Nanyong Sun <sunnanyong@...wei.com>

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>
Signed-off-by: Yu Zhao <yuzhao@...gle.com>
---
 arch/arm64/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index a2f8ff354ca6..25ff026cdaf5 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -105,6 +105,7 @@ 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_EXECMEM_LATE if EXECMEM
 	select ARCH_WANTS_NO_INSTR
-- 
2.46.0.rc2.264.g509ed76dc8-goog