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Re: [PATCH] [v4] malloc: Consistently apply trim_threshold to all heaps [BZ #17195]


On 18.02.2015 11:29, Mel Gorman wrote:

> 
> 2015-02-10  Mel Gorman  <mgorman@suse.de>
> 
>   [BZ #17195]
>   * malloc/arena.c (free): Apply trim threshold to per-thread heaps
>     as well as the main arena.
> ---
>  malloc/arena.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/malloc/arena.c b/malloc/arena.c
> index 886defb074a2..a78d4835a825 100644
> --- a/malloc/arena.c
> +++ b/malloc/arena.c
> @@ -696,7 +696,7 @@ heap_trim (heap_info *heap, size_t pad)
>      }
>    top_size = chunksize (top_chunk);
>    extra = (top_size - pad - MINSIZE - 1) & ~(pagesz - 1);
> -  if (extra < (long) pagesz)
> +  if (extra < (long) mp_.trim_threshold)
>      return 0;
>  
>    /* Try to shrink. */
> 


the patch does not seem to account for trim threshold being -1 which is
documented to disable the threshold.


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