Re: [PATCH -mm -v3] mm, swap: Sort swap entries before free

[Rik van Riel]

On Fri, 2017-04-07 at 14:49 +0800, Huang, Ying wrote:

> To solve the issue, the per-CPU buffer is sorted according to the
> swap
> device before freeing the swap entries.ÂÂTest shows that the time
> spent by swapcache_free_entries() could be reduced after the patch.
> 
> Test the patch via measuring the run time of
> swap_cache_free_entries()
> during the exit phase of the applications use much swap space.ÂÂThe
> results shows that the average run time of swap_cache_free_entries()
> reduced about 20% after applying the patch.
> 
> Signed-off-by: Huang Ying <ying.huang@xxxxxxxxx>
> Acked-by: Tim Chen <tim.c.chen@xxxxxxxxx>
> Cc: Hugh Dickins <hughd@xxxxxxxxxx>
> Cc: Shaohua Li <shli@xxxxxxxxxx>
> Cc: Minchan Kim <minchan@xxxxxxxxxx>
> Cc: Rik van Riel <riel@xxxxxxxxxx>

Acked-by: Rik van Riel <riel@xxxxxxxxxx>