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    SubjectRe: [PATCH 15/16] mm/migration: fix possible do_pages_stat_array racing with memory offline
    On Mon, Mar 7, 2022 at 1:22 PM Huang, Ying <ying.huang@intel.com> wrote:
    >
    > Miaohe Lin <linmiaohe@huawei.com> writes:
    >
    > > When follow_page peeks a page, the page could be reclaimed under heavy
    > > memory pressure
    >
    > I don't think that memory pressure and reclaiming will be an issue.

    I think he means a page first to be reclaimed then to be offline
    could encounter this issue and reclaiming is a precondition.

    Thanks.

    >
    > > and thus be offlined while it's still being used by the
    > > do_pages_stat_array().
    >
    > "offline" seems a possible problem.

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