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Subject: Re: [PATCH 2/2] hugetlb: update vma flag check for hugetlb vma lock
To:     Mike Kravetz <mike.kravetz@oracle.com>, <linux-mm@kvack.org>,
        <linux-kernel@vger.kernel.org>
CC:     Muchun Song <songmuchun@bytedance.com>,
        David Hildenbrand <david@redhat.com>,
        Peter Xu <peterx@redhat.com>,
        Naoya Horiguchi <naoya.horiguchi@linux.dev>,
        "Aneesh Kumar K . V" <aneesh.kumar@linux.vnet.ibm.com>,
        James Houghton <jthoughton@google.com>,
        Mina Almasry <almasrymina@google.com>,
        Andrew Morton <akpm@linux-foundation.org>
References: <20221212235042.178355-1-mike.kravetz@oracle.com>
 <20221212235042.178355-2-mike.kravetz@oracle.com>
From:   Miaohe Lin <linmiaohe@huawei.com>
Message-ID: <a494ecba-2fab-f39f-6d6d-9ab43d080988@huawei.com>
Date:   Sat, 17 Dec 2022 10:01:54 +0800
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On 2022/12/13 7:50, Mike Kravetz wrote:
> The check for whether a hugetlb vma lock exists partially depends on
> the vma's flags.  Currently, it checks for either VM_MAYSHARE or
> VM_SHARED.  The reason both flags are used is because VM_MAYSHARE was
> previously cleared in hugetlb vmas as they are tore down.  This is no
> longer the case, and only the VM_MAYSHARE check is required.
> 
> Signed-off-by: Mike Kravetz <mike.kravetz@oracle.com>

Nice cleanup. This is also what I planed to do. ;)

Reviewed-by: Miaohe Lin <linmiaohe@huawei.com>

Thanks,
Miaohe Lin