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    Subject[PATCH 3/8] writeback: use WRITE_SYNC for reclaim or sync writeback
    Date
    If we're doing reclaim or sync IO, use WRITE_SYNC to inform the lower
    levels of the importance of this IO.

    Signed-off-by: Jens Axboe <axboe@fb.com>
    ---
    include/linux/writeback.h | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    diff --git a/include/linux/writeback.h b/include/linux/writeback.h
    index 719c255e105a..b2c75b8901da 100644
    --- a/include/linux/writeback.h
    +++ b/include/linux/writeback.h
    @@ -102,7 +102,7 @@ struct writeback_control {

    static inline int wbc_to_write(struct writeback_control *wbc)
    {
    - if (wbc->sync_mode == WB_SYNC_ALL)
    + if (wbc->sync_mode == WB_SYNC_ALL || wbc->for_reclaim || wbc->for_sync)
    return WRITE_SYNC;

    return WRITE;
    --
    2.4.1.168.g1ea28e1
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