linux-kernel - Re: [PATCH] mm: add nr_free_highatomic in show_free

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Message-ID: <a7c8f6fe-19c9-4546-900a-3d164ec37a94@arm.com>
Date: Tue, 15 Apr 2025 12:10:07 +0530
From: Anshuman Khandual <anshuman.khandual@....com>
To: gaoxu <gaoxu2@...or.com>, Andrew Morton <akpm@...ux-foundation.org>
Cc: Mike Rapoport <rppt@...nel.org>, "surenb@...gle.com" <surenb@...gle.com>,
 Yu Zhao <yuzhao@...gle.com>, Barry Song <21cnbao@...il.com>,
 "linux-mm@...ck.org" <linux-mm@...ck.org>,
 "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
 yipengxiang <yipengxiang@...or.com>
Subject: Re: [PATCH] mm: add nr_free_highatomic in show_free_areas

On 4/12/25 14:57, gaoxu 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@...or.com>
> ---
>  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)),

Reviewed-by: Anshuman Khandual <anshuman.khandual@....com>