+ memcontrol-add-ksm_profit-in-cgroup-memoryksm_stat.patch added to mm-new branch

[Andrew Morton <akpm@linux-foundation.org>]

The patch titled
     Subject: memcontrol: add ksm_profit in cgroup/memory.ksm_stat
has been added to the -mm mm-new branch.  Its filename is
     memcontrol-add-ksm_profit-in-cgroup-memoryksm_stat.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/memcontrol-add-ksm_profit-in-cgroup-memoryksm_stat.patch

This patch will later appear in the mm-new branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Note, mm-new is a provisional staging ground for work-in-progress
patches, and acceptance into mm-new is a notification for others take
notice and to finish up reviews.  Please do not hesitate to respond to
review feedback and post updated versions to replace or incrementally
fixup patches in mm-new.

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*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***

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branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: xu xin <xu.xin16@zte.com.cn>
Subject: memcontrol: add ksm_profit in cgroup/memory.ksm_stat
Date: Thu, 1 May 2025 04:15:49 +0000

Users can obtain ksm_profit of a cgroup just by:

/ # cat /sys/fs/cgroup/memory.ksm_stat
ksm_rmap_items 76800
ksm_zero_pages 0
ksm_merging_pages 76800
ksm_profit 309657600

Link: https://lkml.kernel.org/r/20250501041549.3324472-1-xu.xin16@zte.com.cn
Signed-off-by: xu xin <xu.xin16@zte.com.cn>
Cc: David Hildenbrand <david@redhat.com>
Cc: Haonan Chen <chen.haonan2@zte.com.cn>
Cc: Wang Yaxin <wang.yaxin@zte.com.cn>
Cc: Yang Yang <yang.yang29@zte.com.cn>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: Muchun Song <songmuchun@bytedance.com>
Cc: Roman Gushchin <roman.gushchin@linux.dev>
Cc: Shakeel Butt <shakeel.butt@linux.dev>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/memcontrol.c |    4 ++++
 1 file changed, 4 insertions(+)

--- a/mm/memcontrol.c~memcontrol-add-ksm_profit-in-cgroup-memoryksm_stat
+++ a/mm/memcontrol.c
@@ -4473,6 +4473,7 @@ struct memcg_ksm_stat {
 	unsigned long ksm_rmap_items;
 	long ksm_zero_pages;
 	unsigned long ksm_merging_pages;
+	long ksm_profit;
 };
 
 static int evaluate_memcg_ksm_stat(struct task_struct *task, void *arg)
@@ -4485,6 +4486,7 @@ static int evaluate_memcg_ksm_stat(struc
 		ksm_stat->ksm_rmap_items += mm->ksm_rmap_items;
 		ksm_stat->ksm_zero_pages += mm_ksm_zero_pages(mm);
 		ksm_stat->ksm_merging_pages += mm->ksm_merging_pages;
+		ksm_stat->ksm_profit += ksm_process_profit(mm);
 		mmput(mm);
 	}
 
@@ -4500,6 +4502,7 @@ static int memcg_ksm_stat_show(struct se
 	ksm_stat.ksm_rmap_items = 0;
 	ksm_stat.ksm_zero_pages = 0;
 	ksm_stat.ksm_merging_pages = 0;
+	ksm_stat.ksm_profit = 0;
 
 	/* summing all processes'ksm statistic items of this cgroup hierarchy */
 	mem_cgroup_scan_tasks(memcg, evaluate_memcg_ksm_stat, &ksm_stat);
@@ -4507,6 +4510,7 @@ static int memcg_ksm_stat_show(struct se
 	seq_printf(m, "ksm_rmap_items %lu\n", ksm_stat.ksm_rmap_items);
 	seq_printf(m, "ksm_zero_pages %ld\n", ksm_stat.ksm_zero_pages);
 	seq_printf(m, "ksm_merging_pages %ld\n", ksm_stat.ksm_merging_pages);
+	seq_printf(m, "ksm_profit %ld\n", ksm_stat.ksm_profit);
 
 	return 0;
 }
_

Patches currently in -mm which might be from xu.xin16@zte.com.cn are

memcontrol-rename-mem_cgroup_scan_tasks.patch
memcontrol-introduce-the-new-mem_cgroup_scan_tasks.patch
memcontrol-introduce-ksm_stat-at-memcg-v2.patch
memcontrol-add-ksm_zero_pages-in-cgroup-memoryksm_stat.patch
memcontrol-add-ksm_merging_pages-in-cgroup-memoryksm_stat.patch
memcontrol-add-ksm_profit-in-cgroup-memoryksm_stat.patch
memcontrol-v1-add-ksm_stat-at-memcg-v1.patch
documentation-add-ksm_stat-description-in-cgroup-v1-memoryrst.patch
documentation-add-ksm_stat-description-in-cgroup-v2rst.patch