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    Subject[patch 3/5] mm: writeback: remove seriously stale comment on dirty limits
    Date
    From: Johannes Weiner <hannes@cmpxchg.org>

    Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
    ---
    mm/page-writeback.c | 18 ------------------
    1 files changed, 0 insertions(+), 18 deletions(-)

    diff --git a/mm/page-writeback.c b/mm/page-writeback.c
    index a4de005..41dc871 100644
    --- a/mm/page-writeback.c
    +++ b/mm/page-writeback.c
    @@ -379,24 +379,6 @@ int bdi_set_max_ratio(struct backing_dev_info *bdi, unsigned max_ratio)
    EXPORT_SYMBOL(bdi_set_max_ratio);

    /*
    - * Work out the current dirty-memory clamping and background writeout
    - * thresholds.
    - *
    - * The main aim here is to lower them aggressively if there is a lot of mapped
    - * memory around. To avoid stressing page reclaim with lots of unreclaimable
    - * pages. It is better to clamp down on writers than to start swapping, and
    - * performing lots of scanning.
    - *
    - * We only allow 1/2 of the currently-unmapped memory to be dirtied.
    - *
    - * We don't permit the clamping level to fall below 5% - that is getting rather
    - * excessive.
    - *
    - * We make sure that the background writeout level is below the adjusted
    - * clamping level.
    - */
    -
    -/*
    * global_dirty_limits - background-writeback and dirty-throttling thresholds
    *
    * Calculate the dirty thresholds based on sysctl parameters
    --
    1.7.6


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