linux-kernel - Re: [PATCH v3] arm64: mm: hugetlb: Enable HUGETLB_PAGE_FREE

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Date:   Wed, 30 Mar 2022 19:41:47 -0700
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     Muchun Song <songmuchun@...edance.com>
Cc:     will@...nel.org, david@...hat.com, bodeddub@...zon.com,
        osalvador@...e.de, mike.kravetz@...cle.com, rientjes@...gle.com,
        mark.rutland@....com, catalin.marinas@....com, james.morse@....com,
        21cnbao@...il.com, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        duanxiongchun@...edance.com, fam.zheng@...edance.com,
        smuchun@...il.com
Subject: Re: [PATCH v3] arm64: mm: hugetlb: Enable HUGETLB_PAGE_FREE_VMEMMAP
 for arm64

On Wed, 30 Mar 2022 22:54:00 +0800 Muchun Song <songmuchun@...edance.com> wrote:

> --- a/fs/Kconfig
> +++ b/fs/Kconfig
> @@ -247,7 +247,7 @@ config HUGETLB_PAGE
>  
>  config HUGETLB_PAGE_FREE_VMEMMAP
>  	def_bool HUGETLB_PAGE
> -	depends on X86_64
> +	depends on X86_64 || ARM64

This list is just going to get longer, until someone goes and switches
it to use ARCH_WANT_HUGETLB_PAGE_FREE_VMEMMAP or whatever.  Why not do
that now?

>  	depends on SPARSEMEM_VMEMMAP