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    SubjectRe: [PATCH] mm/filemap.c: unconditionally call mark_page_accessed
    On Thu, Mar 15, 2007 at 05:44:01PM +0000, Hugh Dickins wrote:
    > who removed the !offset condition, he should be consulted on its
    > reintroduction.

    the !offset check looks a pretty broken heuristic indeed, it would
    break random I/O. The real fix is to add a ra.prev_offset along with
    ra.prev_page, and if who implements it wants to be stylish he can as
    well use a ra.last_contiguous_read structure that has a page and
    offset fields (and then of course remove ra.prev_page).
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