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

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Message-ID: <d92eeff74f7a4578a14ac777cfe3603a@honor.com>
Date: Sat, 12 Apr 2025 09:27:24 +0000
From: gaoxu <gaoxu2@...or.com>
To: 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>, gaoxu
	<gaoxu2@...or.com>
Subject: [PATCH] mm: add nr_free_highatomic in show_free_areas

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)),
-- 
2.17.1