linux-kernel - Re: [PATCH 2/2] hugetlb: update vma flag check for hugetlb vma lock

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Date:   Sat, 17 Dec 2022 10:01:54 +0800
From:   Miaohe Lin <linmiaohe@...wei.com>
To:     Mike Kravetz <mike.kravetz@...cle.com>, <linux-mm@...ck.org>,
        <linux-kernel@...r.kernel.org>
CC:     Muchun Song <songmuchun@...edance.com>,
        David Hildenbrand <david@...hat.com>,
        Peter Xu <peterx@...hat.com>,
        Naoya Horiguchi <naoya.horiguchi@...ux.dev>,
        "Aneesh Kumar K . V" <aneesh.kumar@...ux.vnet.ibm.com>,
        James Houghton <jthoughton@...gle.com>,
        Mina Almasry <almasrymina@...gle.com>,
        Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH 2/2] hugetlb: update vma flag check for hugetlb vma lock

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@...cle.com>

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

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

Thanks,
Miaohe Lin