On (07/16/15 09:10), Minchan Kim wrote:
> There is no need to recalcurate pages_per_zspage in runtime.
> Just use class->pages_per_zspage to avoid unnecessary runtime
> overhead.
> 
> * From v1
>   * fix up __zs_compact - Sergey
> 
> Signed-off-by: Minchan Kim <[email protected]>

thanks.

Acked-by: Sergey Senozhatsky <[email protected]>

        -ss

> ---
>  mm/zsmalloc.c | 5 ++---
>  1 file changed, 2 insertions(+), 3 deletions(-)
> 
> diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c
> index 27b9661c8fa6..c9685bb2bb92 100644
> --- a/mm/zsmalloc.c
> +++ b/mm/zsmalloc.c
> @@ -1711,7 +1711,7 @@ static unsigned long zs_can_compact(struct size_class 
> *class)
>       obj_wasted /= get_maxobj_per_zspage(class->size,
>                       class->pages_per_zspage);
>  
> -     return obj_wasted * get_pages_per_zspage(class->size);
> +     return obj_wasted * class->pages_per_zspage;
>  }
>  
>  static void __zs_compact(struct zs_pool *pool, struct size_class *class)
> @@ -1749,8 +1749,7 @@ static void __zs_compact(struct zs_pool *pool, struct 
> size_class *class)
>  
>               putback_zspage(pool, class, dst_page);
>               if (putback_zspage(pool, class, src_page) == ZS_EMPTY)
> -                     pool->stats.pages_compacted +=
> -                             get_pages_per_zspage(class->size);
> +                     pool->stats.pages_compacted += class->pages_per_zspage;
>               spin_unlock(&class->lock);
>               cond_resched();
>               spin_lock(&class->lock);
--
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