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    SubjectRe: [PATCH v2] page cache: Store only head pages in i_pages
    On Thu, Feb 14, 2019 at 04:30:04PM +0300, Kirill A. Shutemov wrote:
    > - migrate_page_move_mapping() has to be converted too.

    I think that's as simple as:

    +++ b/mm/migrate.c
    @@ -465,7 +465,7 @@ int migrate_page_move_mapping(struct address_space *mapping,

    for (i = 1; i < HPAGE_PMD_NR; i++) {
    xas_next(&xas);
    - xas_store(&xas, newpage + i);
    + xas_store(&xas, newpage);
    }
    }

    or do you see something else I missed?

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