linux-kernel - Re: [PATCH v10 02/11] mm/hugetlb: Introduce a new config HUGETLB_PAGE_FREE

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Message-ID: <2c0fb4d7-e25b-a5d3-c397-f20398a84732@oracle.com>
Date:   Mon, 21 Dec 2020 15:56:26 -0800
From:   Mike Kravetz <mike.kravetz@...cle.com>
To:     Muchun Song <songmuchun@...edance.com>, corbet@....net,
        tglx@...utronix.de, mingo@...hat.com, bp@...en8.de, x86@...nel.org,
        hpa@...or.com, dave.hansen@...ux.intel.com, luto@...nel.org,
        peterz@...radead.org, viro@...iv.linux.org.uk,
        akpm@...ux-foundation.org, paulmck@...nel.org,
        mchehab+huawei@...nel.org, pawan.kumar.gupta@...ux.intel.com,
        rdunlap@...radead.org, oneukum@...e.com, anshuman.khandual@....com,
        jroedel@...e.de, almasrymina@...gle.com, rientjes@...gle.com,
        willy@...radead.org, osalvador@...e.de, mhocko@...e.com,
        song.bao.hua@...ilicon.com, david@...hat.com,
        naoya.horiguchi@....com
Cc:     duanxiongchun@...edance.com, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        linux-fsdevel@...r.kernel.org
Subject: Re: [PATCH v10 02/11] mm/hugetlb: Introduce a new config
 HUGETLB_PAGE_FREE_VMEMMAP

On 12/17/20 4:12 AM, 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 <songmuchun@...edance.com>
> ---
>  arch/x86/mm/init_64.c |  2 +-
>  fs/Kconfig            | 18 ++++++++++++++++++
>  2 files changed, 19 insertions(+), 1 deletion(-)

Thanks for updating,

Acked-by: Mike Kravetz <mike.kravetz@...cle.com>

-- 
Mike Kravetz