Re: [patch 3/5] mm: writeback: remove seriously stale comment ondirty limits

[Michal Hocko]

On Mon 25-07-11 22:19:17, Johannes Weiner wrote:
> From: Johannes Weiner <hannes@xxxxxxxxxxx>
> 
> Signed-off-by: Johannes Weiner <hannes@xxxxxxxxxxx>

Indeed outdated a lot.

Reviewed-by: Michal Hocko <mhocko@xxxxxxx>
if it makes any sense for comment removal like this.

> ---
>  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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-- 
Michal Hocko
SUSE Labs
SUSE LINUX s.r.o.
Lihovarska 1060/12
190 00 Praha 9    
Czech Republic
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