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    SubjectRe: [PATCH 6/8] Revert "mm: compaction: make isolate_lru_page() filter-aware"
    On Sat, Nov 19, 2011 at 08:54:18PM +0100, Andrea Arcangeli wrote:
    > This reverts commit
    > 39deaf8585152f1a35c1676d3d7dc6ae0fb65967.
    >
    > PageDirty is non blocking for compaction (unlike for
    > mm/vmscan.c:may_writepage) so async compaction should include it.
    >

    It blocks if fallback_migrate_page() is used which happens if the
    underlying filesystem does not support ->migratepage.

    --
    Mel Gorman
    SUSE Labs


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