Re: [PATCH 2/3] mm: add indirectly reclaimable memory to MemAvailable

[Roman Gushchin]

Please, ignore this particular patch, it was sent by mistake.

On Mon, Mar 05, 2018 at 01:37:41PM +0000, Roman Gushchin wrote:
> This patch adjusts /proc/meminfo MemAvailable calculation
> by adding the amount of indirectly reclaimable memory
> (rounded to the PAGE_SIZE).
> 
> Signed-off-by: Roman Gushchin <guro@xxxxxx>
> Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
> Cc: Alexander Viro <viro@xxxxxxxxxxxxxxxxxx>
> Cc: Michal Hocko <mhocko@xxxxxxxx>
> Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
> Cc: linux-fsdevel@xxxxxxxxxxxxxxx
> Cc: linux-kernel@xxxxxxxxxxxxxxx
> Cc: linux-mm@xxxxxxxxx
> Cc: kernel-team@xxxxxx
> ---
>  mm/page_alloc.c | 7 +++++++
>  1 file changed, 7 insertions(+)
> 
> diff --git a/mm/page_alloc.c b/mm/page_alloc.c
> index 2836bc9e0999..2247cda9e94e 100644
> --- a/mm/page_alloc.c
> +++ b/mm/page_alloc.c
> @@ -4695,6 +4695,13 @@ long si_mem_available(void)
>  		     min(global_node_page_state(NR_SLAB_RECLAIMABLE) / 2,
>  			 wmark_low);
>  
> +	/*
> +	 * Part of the kernel memory, which can be released under memory
> +	 * pressure.
> +	 */
> +	available += global_node_page_state(NR_INDIRECTLY_RECLAIMABLE_BYTES) >>
> +		PAGE_SHIFT;
> +
>  	if (available < 0)
>  		available = 0;
>  	return available;
> -- 
> 2.14.3
>