From nobody Tue Feb 10 23:55:26 2026 Received: from mxct.zte.com.cn (mxct.zte.com.cn [183.62.165.209]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B5614199EB0; Thu, 3 Apr 2025 05:40:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=183.62.165.209 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1743658820; cv=none; b=Ao08miL5iTfimqm8BglCFmx+yxknCXNZE7t1BAQ4nIQPHHcyAKLfkkOMH5dGxk0SX1q/qsY5tegHFxqOUs8LA80Bx5dQtCKBpp9Ji/3MlrRui/7f1PVTeI8W13yfGxQ04pLY+042/kg82X8upOICqeycq4ahUULJnUHuREUzJPE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1743658820; c=relaxed/simple; bh=/tTUnVNOyLZuLB9VxUf703I3JwCpIFx3QDmRbmt33Lw=; h=Date:Message-ID:In-Reply-To:References:Mime-Version:From:To:Cc: Subject:Content-Type; b=eH+MwMkwm2qvH28+TM/eTO/P69yjrXK76pxMnY5QDKZhlteAnfJMe2q480IyCbniba/jzqljAvWKA+uWDYZZF3aMSSRvqJV+t5K41/NXWwB+pt0NidjYL4WKXtD5hgEWvK4xG6kbRhphnm8tf2TxpDKSFQBGEaXJI1bZhYWCSgA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=zte.com.cn; spf=pass smtp.mailfrom=zte.com.cn; arc=none smtp.client-ip=183.62.165.209 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=zte.com.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=zte.com.cn Received: from mse-fl1.zte.com.cn (unknown [10.5.228.132]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mxct.zte.com.cn (FangMail) with ESMTPS id 4ZSrDD759fz4x6DN; Thu, 3 Apr 2025 13:40:12 +0800 (CST) Received: from xaxapp05.zte.com.cn ([10.99.98.109]) by mse-fl1.zte.com.cn with SMTP id 5335eBrW047456; Thu, 3 Apr 2025 13:40:11 +0800 (+08) (envelope-from xu.xin16@zte.com.cn) Received: from mapi (xaxapp05[null]) by mapi (Zmail) with MAPI id mid32; Thu, 3 Apr 2025 13:40:13 +0800 (CST) Date: Thu, 3 Apr 2025 13:40:13 +0800 (CST) X-Zmail-TransId: 2afc67ee1f3dffffffffce3-75188 X-Mailer: Zmail v1.0 Message-ID: <20250403134013749X6VVdhQope3TRpBQF_qia@zte.com.cn> In-Reply-To: <20250403132534636XLwK7CWiCj1J4-FENz0vk@zte.com.cn> References: 20250403132534636XLwK7CWiCj1J4-FENz0vk@zte.com.cn Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 From: To: , Cc: , , , , , , , , , , Subject: =?UTF-8?B?W1BBVENIIGxpbnV4LW5leHQgNi82XSBtZW1jb250cm9sLXYxOiBhZGQga3NtX3Byb2ZpdCBpbiBjZ3JvdXAvbWVtb3J5LmtzbV9zdGF0?= X-MAIL: mse-fl1.zte.com.cn 5335eBrW047456 X-Fangmail-Anti-Spam-Filtered: true X-Fangmail-MID-QID: 67EE1F3C.00C/4ZSrDD759fz4x6DN Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: xu xin 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 Current implementation supports cgroup v1 temporarily; cgroup v2 compatibility is planned for future versions. Signed-off-by: xu xin --- mm/memcontrol-v1.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/mm/memcontrol-v1.c b/mm/memcontrol-v1.c index b52f728af963..3e7a653e3df1 100644 --- a/mm/memcontrol-v1.c +++ b/mm/memcontrol-v1.c @@ -1827,6 +1827,7 @@ 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) @@ -1839,6 +1840,7 @@ static int evaluate_memcg_ksm_stat(struct task_struct= *task, void *arg) ksm_stat->ksm_rmap_items +=3D mm->ksm_rmap_items; ksm_stat->ksm_zero_pages +=3D mm_ksm_zero_pages(mm); ksm_stat->ksm_merging_pages +=3D mm->ksm_merging_pages; + ksm_stat->ksm_profit +=3D ksm_process_profit(mm); mmput(mm); } @@ -1854,6 +1856,7 @@ static int memcg_ksm_stat_show(struct seq_file *m, vo= id *v) ksm_stat.ksm_rmap_items =3D 0; ksm_stat.ksm_zero_pages =3D 0; ksm_stat.ksm_merging_pages =3D 0; + ksm_stat.ksm_profit =3D 0; /* summing all processes'ksm statistic items of this cgroup hierarchy */ mem_cgroup_scan_tasks(memcg, evaluate_memcg_ksm_stat, &ksm_stat); @@ -1861,6 +1864,7 @@ static int memcg_ksm_stat_show(struct seq_file *m, vo= id *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; } --=20 2.15.2