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Date:   Fri, 18 Dec 2020 16:41:12 +0100
From:   Oscar Salvador <>
To:     Muchun Song <>
Subject: Re: [PATCH v10 02/11] mm/hugetlb: Introduce a new config

On Thu, Dec 17, 2020 at 08:12:54PM +0800, Muchun Song wrote:
> The HUGETLB_PAGE_FREE_VMEMMAP option is used to enable the freeing
> of unnecessary vmemmap associated with HugeTLB pages. The config
> option is introduced early so that supporting code can be written
> to depend on the option. The initial version of the code only
> provides support for x86-64.
> Like other code which frees vmemmap, this config option depends on
> HAVE_BOOTMEM_INFO_NODE. The routine register_page_bootmem_info() is
> used to register bootmem info. Therefore, make sure
> register_page_bootmem_info is enabled if HUGETLB_PAGE_FREE_VMEMMAP
> is defined.
> Signed-off-by: Muchun Song <>

Ok, this commit message is much more clear, and the same goes for the
config description.

Reviewed-by: Oscar Salvador <>

Oscar Salvador

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