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Message-Id: <20250501041549.3324472-1-xu.xin16@zte.com.cn>
Date: Thu, 1 May 2025 04:15:49 +0000
From: xu.xin.sc@...il.com
To: xu.xin16@....com.cn
Cc: akpm@...ux-foundation.org,
david@...hat.com,
linux-fsdevel@...r.kernel.org,
linux-kernel@...r.kernel.org,
linux-mm@...ck.org,
wang.yaxin@....com.cn,
yang.yang29@....com.cn
Subject: [PATCH v2 6/9] memcontrol: add ksm_profit in cgroup/memory.ksm_stat
From: xu xin <xu.xin16@....com.cn>
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
Signed-off-by: xu xin <xu.xin16@....com.cn>
---
mm/memcontrol.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 9569d32944e3..8ab21420ebb8 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -4394,6 +4394,7 @@ 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)
@@ -4406,6 +4407,7 @@ static int evaluate_memcg_ksm_stat(struct task_struct *task, void *arg)
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);
}
@@ -4421,6 +4423,7 @@ static int memcg_ksm_stat_show(struct seq_file *m, void *v)
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);
@@ -4428,6 +4431,7 @@ static int memcg_ksm_stat_show(struct seq_file *m, void *v)
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;
}
--
2.15.2
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