linux-kernel - Re: [PATCH 1/6] mm: migrate: do not migrate HugeTLB page whose refcount is one

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Message-ID: <c7eb286f-a810-b91b-5ad4-82ef26b898e3@oracle.com>
Date:   Mon, 4 Jan 2021 14:17:17 -0800
From:   Mike Kravetz <mike.kravetz@...cle.com>
To:     Muchun Song <songmuchun@...edance.com>, akpm@...ux-foundation.org
Cc:     hillf.zj@...baba-inc.com, n-horiguchi@...jp.nec.com,
        ak@...ux.intel.com, yongjun_wei@...ndmicro.com.cn, mhocko@...e.cz,
        linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/6] mm: migrate: do not migrate HugeTLB page whose
 refcount is one

On 1/3/21 10:58 PM, Muchun Song wrote:
> If the refcount is one when it is migrated, it means that the page
> was freed from under us. So we are done and do not need to migrate.
> 
> Signed-off-by: Muchun Song <songmuchun@...edance.com>
> ---
>  mm/migrate.c | 6 ++++++
>  1 file changed, 6 insertions(+)

Thanks!

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

-- 
Mike Kravetz