linux-kernel - Re: [PATCH 2/2] riscv: Enable ARCH_WANT_HUGETLB_PAGE_OPTIMIZE

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Message-Id: <1F5AF29D-708A-483B-A29F-CAEE6F554866@linux.dev>
Date:   Mon, 24 Oct 2022 15:07:22 +0800
From:   Muchun Song <muchun.song@...ux.dev>
To:     guoren@...nel.org
Cc:     palmer@...belt.com, palmer@...osinc.com, heiko@...ech.de,
        arnd@...db.de, Muchun Song <songmuchun@...edance.com>,
        catalin.marinas@....com, chenhuacai@...ngson.cn,
        Conor.Dooley@...rochip.com, paul.walmsley@...ive.com,
        aou@...s.berkeley.edu, linux-arch@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-riscv@...ts.infradead.org,
        linux-mm@...ck.org, Guo Ren <guoren@...ux.alibaba.com>
Subject: Re: [PATCH 2/2] riscv: Enable ARCH_WANT_HUGETLB_PAGE_OPTIMIZE_VMEMMAP



> On Oct 23, 2022, at 21:32, guoren@...nel.org wrote:
> 
> From: Guo Ren <guoren@...ux.alibaba.com>
> 
> This patch enable the feature of "free some vmemmap pages of HugeTLB

We have a new name “HVO" to refer to this feature. So I’d like to rewrite
The changelog to something like “Enable HVO [1] for RISCV”.

> page" [1]. To make it work correct, we also need fixup PG_dcache_clean
> setting for huge page [2].
> 
> [1] https://lore.kernel.org/linux-doc/20210510030027.56044-1-songmuchun@bytedance.com/
> [2] https://lore.kernel.org/linux-mm/20220302084624.33340-1-songmuchun@bytedance.com/
> 
> Signed-off-by: Guo Ren <guoren@...ux.alibaba.com>
> Signed-off-by: Guo Ren <guoren@...nel.org>
> Cc: Muchun Song <songmuchun@...edance.com>
> Cc: Huacai Chen <chenhuacai@...ngson.cn>
> Cc: Arnd Bergmann <arnd@...db.de>

I’am really glad to see more and more arches for support HVO.

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

Thanks.