Muchun Song <songmuchun@xxxxxxxxxxxxx> writes: > On Mon, Mar 7, 2022 at 1:22 PM Huang, Ying <ying.huang@xxxxxxxxx> wrote: >> >> Miaohe Lin <linmiaohe@xxxxxxxxxx> 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. I don't think reclaiming is a precondition. It seems possible that the virtual page is migrated, then the physical page is offlined. Best Regards, Huang, Ying > Thanks. > >> >> > and thus be offlined while it's still being used by the >> > do_pages_stat_array(). >> >> "offline" seems a possible problem.
