Re: [PATCH] mm: add nr_free_highatomic in show_free_areas

[Barry Song]

On Sat, Apr 12, 2025 at 9:27 PM gaoxu <gaoxu2@xxxxxxxxx> wrote:
>
> The commit c928807f6f6b6("mm/page_alloc: keep track of free highatomic")
> adds a new variable nr_free_highatomic, which is useful for analyzing low
> mem issues. add nr_free_highatomic in show_free_areas.
>
> Signed-off-by: gao xu <gaoxu2@xxxxxxxxx>

Reviewed-by: Barry Song <baohua@xxxxxxxxxx>

> ---
>  mm/show_mem.c | 2 ++
>  1 file changed, 2 insertions(+)
>
> diff --git a/mm/show_mem.c b/mm/show_mem.c
> index ad373b4b6..03e8d968f 100644
> --- a/mm/show_mem.c
> +++ b/mm/show_mem.c
> @@ -305,6 +305,7 @@ static void show_free_areas(unsigned int filter, nodemask_t *nodemask, int max_z
>                         " low:%lukB"
>                         " high:%lukB"
>                         " reserved_highatomic:%luKB"
> +                       " free_highatomic:%luKB"
>                         " active_anon:%lukB"
>                         " inactive_anon:%lukB"
>                         " active_file:%lukB"
> @@ -326,6 +327,7 @@ static void show_free_areas(unsigned int filter, nodemask_t *nodemask, int max_z
>                         K(low_wmark_pages(zone)),
>                         K(high_wmark_pages(zone)),
>                         K(zone->nr_reserved_highatomic),
> +                       K(zone->nr_free_highatomic),
>                         K(zone_page_state(zone, NR_ZONE_ACTIVE_ANON)),
>                         K(zone_page_state(zone, NR_ZONE_INACTIVE_ANON)),
>                         K(zone_page_state(zone, NR_ZONE_ACTIVE_FILE)),
> --
> 2.17.1