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    Subjectper-bdi-throttling: synchronous writepage doesn't work correctly

    It looks like bdi_thresh will always be zero if filesystem does
    synchronous writepage, resulting in very poor write performance.

    Hostfs (UML) is one such example, but there might be others.

    The only solution I can think of is to add a set_page_writeback();
    end_page_writeback() pair (or some reduced variant, that only does
    the proportions magic). But that means auditing quite a few

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      Last update: 2007-11-01 17:49    [W:0.017 / U:15.212 seconds]
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