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Subject: Re: [PATCH V14 4/4] LoongArch: Enable
 ARCH_WANT_HUGETLB_PAGE_OPTIMIZE_VMEMMAP
From:   Muchun Song <muchun.song@linux.dev>
In-Reply-To: <20221027125253.3458989-5-chenhuacai@loongson.cn>
Date:   Thu, 3 Nov 2022 10:49:17 +0800
Cc:     Arnd Bergmann <arnd@arndb.de>, Huacai Chen <chenhuacai@kernel.org>,
        Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
        Dave Hansen <dave.hansen@linux.intel.com>,
        Andy Lutomirski <luto@kernel.org>,
        Peter Zijlstra <peterz@infradead.org>,
        Catalin Marinas <catalin.marinas@arm.com>,
        Will Deacon <will@kernel.org>,
        Dinh Nguyen <dinguyen@kernel.org>, loongarch@lists.linux.dev,
        linux-arch@vger.kernel.org, Xuefeng Li <lixuefeng@loongson.cn>,
        Guo Ren <guoren@kernel.org>, Xuerui Wang <kernel@xen0n.name>,
        Jiaxun Yang <jiaxun.yang@flygoat.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        Linux Memory Management List <linux-mm@kvack.org>,
        linux-mips@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-arm-kernel@lists.infradead.org,
        Feiyang Chen <chenfeiyang@loongson.cn>,
        =?utf-8?Q?Philippe_Mathieu-Daud=C3=A9?= <philmd@linaro.org>
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References: <20221027125253.3458989-1-chenhuacai@loongson.cn>
 <20221027125253.3458989-5-chenhuacai@loongson.cn>
To:     Huacai Chen <chenhuacai@loongson.cn>
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> On Oct 27, 2022, at 20:52, Huacai Chen <chenhuacai@loongson.cn> wrote:
>=20
> From: Feiyang Chen <chenfeiyang@loongson.cn>
>=20
> The feature of minimizing overhead of struct page associated with each
> HugeTLB page is implemented on x86_64. However, the infrastructure of

I'd like to refer to this feature as HVO (more simplified).

> this feature is already there, so just select ARCH_WANT_HUGETLB_PAGE_
> OPTIMIZE_VMEMMAP is enough to enable this feature for LoongArch.
>=20
> Reviewed-by: Philippe Mathieu-Daud=C3=A9 <philmd@linaro.org>
> Signed-off-by: Feiyang Chen <chenfeiyang@loongson.cn>
> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

Acked-by: Muchun Song <songmuchun@bytedance.com>

Thanks.=