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    Subject[patch 41/46] mm: write_cache_pages more terminate quickly
    2.6.28-stable review patch.  If anyone has any objections, please let us know.

    ------------------

    From: Andrew Morton <akpm@linux-foundation.org>

    commit 82fd1a9a8ced9607312b54859572bcc6211e8919 upstream.

    Now that we have the early-termination logic in place, it makes sense to
    bail out early in all other cases where done is set to 1.

    Signed-off-by: Nick Piggin <npiggin@suse.de>
    Cc: Chris Mason <chris.mason@oracle.com>
    Cc: Dave Chinner <david@fromorbit.com>
    Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
    Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
    Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

    ---
    mm/page-writeback.c | 5 ++++-
    1 file changed, 4 insertions(+), 1 deletion(-)

    --- a/mm/page-writeback.c
    +++ b/mm/page-writeback.c
    @@ -983,12 +983,15 @@ continue_unlock:

    if (wbc->sync_mode == WB_SYNC_NONE) {
    wbc->nr_to_write--;
    - if (wbc->nr_to_write <= 0)
    + if (wbc->nr_to_write <= 0) {
    done = 1;
    + break;
    + }
    }
    if (wbc->nonblocking && bdi_write_congested(bdi)) {
    wbc->encountered_congestion = 1;
    done = 1;
    + break;
    }
    }
    pagevec_release(&pvec);


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