From nobody Tue Feb 10 11:33:11 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 D3748199EB0; Thu, 3 Apr 2025 05:38:40 +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=1743658722; cv=none; b=FzvQ0RXHs/VJOGA/XNv4z9xL9l0axMipf0KCT6VwFzGbdA3ZEcU5J9jXSVO8EcyaT3qguRxmWp3wHMGE2q1XaerWrOqOnv1rZMD1TIQIY2FbRB79ALzZtikmTBAYzBf0z9xCSQiq+v6liG10JtkcdYDXerNA6ExZ+mZ1KhYdCdA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1743658722; c=relaxed/simple; bh=zi8NXk3p42tO/Q7Q7pLyw/dDYNobmqL2jNxPxFyODRc=; h=Date:Message-ID:In-Reply-To:References:Mime-Version:From:To:Cc: Subject:Content-Type; b=aSokeQImeezXwczY8jkCxU5jEGC4w12FwswsseVtxl/0/iKnFQd/AR6cJqpRewxJ90pVHDcsnV9qVkzgYoytYhce29tuMdO3dAydrZ4yRwh9BVPLAoOH4d1YtXFW1TEDsriTiIIIq4j5jGH9tv83roThA9FC1IoUuQgC4R5f8uE= 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-fl2.zte.com.cn (unknown [10.5.228.133]) (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 4ZSrBN0RWlz51SY9; Thu, 3 Apr 2025 13:38:36 +0800 (CST) Received: from xaxapp04.zte.com.cn ([10.99.98.157]) by mse-fl2.zte.com.cn with SMTP id 5335cWOB017140; Thu, 3 Apr 2025 13:38:32 +0800 (+08) (envelope-from xu.xin16@zte.com.cn) Received: from mapi (xaxapp04[null]) by mapi (Zmail) with MAPI id mid32; Thu, 3 Apr 2025 13:38:34 +0800 (CST) Date: Thu, 3 Apr 2025 13:38:34 +0800 (CST) X-Zmail-TransId: 2afb67ee1eda53d-6e9e8 X-Mailer: Zmail v1.0 Message-ID: <20250403133834135T-0RJg5_VxJfmzN3dG3bE@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?W1BBVENIIGxpbnV4LW5leHQgNS82XSBtZW1jb250cm9sLXYxOiBhZGQga3NtX21lcmdpbmdfcGFnZXMgaW4gY2dyb3VwL21lbW9yeS5rc21fc3RhdA==?= X-MAIL: mse-fl2.zte.com.cn 5335cWOB017140 X-Fangmail-Anti-Spam-Filtered: true X-Fangmail-MID-QID: 67EE1EDC.000/4ZSrBN0RWlz51SY9 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: xu xin Users can obtain ksm_merging_pages of a cgroup just by: / # cat /sys/fs/cgroup/memory.ksm_stat ksm_rmap_items 76800 ksm_zero_pages 0 ksm_merging_pages 1092 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 a6eea1deebff..b52f728af963 100644 --- a/mm/memcontrol-v1.c +++ b/mm/memcontrol-v1.c @@ -1826,6 +1826,7 @@ static int memcg_numa_stat_show(struct seq_file *m, v= oid *v) struct memcg_ksm_stat { unsigned long ksm_rmap_items; long ksm_zero_pages; + unsigned long ksm_merging_pages; }; static int evaluate_memcg_ksm_stat(struct task_struct *task, void *arg) @@ -1837,6 +1838,7 @@ static int evaluate_memcg_ksm_stat(struct task_struct= *task, void *arg) if (mm) { 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; mmput(mm); } @@ -1851,12 +1853,14 @@ static int memcg_ksm_stat_show(struct seq_file *m, = void *v) /* Initialization */ ksm_stat.ksm_rmap_items =3D 0; ksm_stat.ksm_zero_pages =3D 0; + ksm_stat.ksm_merging_pages =3D 0; /* summing all processes'ksm statistic items of this cgroup hierarchy */ mem_cgroup_scan_tasks(memcg, evaluate_memcg_ksm_stat, &ksm_stat); 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); return 0; } --=20 2.15.2