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[139.178.88.99]) by mx.google.com with ESMTPS id gq6-20020a17090b104600b002995f0ef92asi2958083pjb.111.2024.02.18.19.20.50 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 18 Feb 2024 19:20:50 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel+bounces-70673-ouuuleilei=gmail.com@vger.kernel.org designates 139.178.88.99 as permitted sender) client-ip=139.178.88.99; Authentication-Results: mx.google.com; arc=pass (i=1 spf=pass spfdomain=unisoc.com); spf=pass (google.com: domain of linux-kernel+bounces-70673-ouuuleilei=gmail.com@vger.kernel.org designates 139.178.88.99 as permitted sender) smtp.mailfrom="linux-kernel+bounces-70673-ouuuleilei=gmail.com@vger.kernel.org" Received: from smtp.subspace.kernel.org (wormhole.subspace.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by sv.mirrors.kernel.org (Postfix) with ESMTPS id 42D14281793 for ; Mon, 19 Feb 2024 03:20:50 +0000 (UTC) Received: from localhost.localdomain (localhost.localdomain [127.0.0.1]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 26FD15673; Mon, 19 Feb 2024 03:20:36 +0000 (UTC) Received: from SHSQR01.spreadtrum.com (mx1.unisoc.com [222.66.158.135]) (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 C237C4C90 for ; Mon, 19 Feb 2024 03:20:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=222.66.158.135 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708312834; cv=none; b=U+9gBxPChz/YwQBnh0SEsLCLiH40ZisZA3a7cx4qtIcOjzTK6mMqaQge8MgnNMRt8Nq4OeukJDzuChGZBpg6tBKZigzSLCjXwGkJ1J1compb/6rRiVEDRRWxM93soeipOjjdtyYMr2KxF3mQR9whHKiEcg39TtU6KchLJ8qToSQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708312834; c=relaxed/simple; bh=qZ3QP/O+dKCUtJMzLtIoEE1u0enCWJg3RGRx2cIFbdQ=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=pXWjJHk99R8Do9KTjwACro26QqEJ12WAPdfHkvc35XHZu/QdcQsyI+j7AVT9YUSPv76PEb3WoCU9IorPK+2zP3e/qqjDTm5PbRoOTvW4/qH+J3Rki4Gm9EMgHopwg5NeAfSplvLSI85C6NKVLHzfjMoz3YxJ+mbPsKNWo10cF+4= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=unisoc.com; spf=pass smtp.mailfrom=unisoc.com; arc=none smtp.client-ip=222.66.158.135 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=unisoc.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=unisoc.com Received: from dlp.unisoc.com ([10.29.3.86]) by SHSQR01.spreadtrum.com with ESMTP id 41J3KDic006816; Mon, 19 Feb 2024 11:20:13 +0800 (+08) (envelope-from fangzheng.zhang@unisoc.com) Received: from SHDLP.spreadtrum.com (bjmbx02.spreadtrum.com [10.0.64.8]) by dlp.unisoc.com (SkyGuard) with ESMTPS id 4TdSSt0CC8z2KDdHY; Mon, 19 Feb 2024 11:19:42 +0800 (CST) Received: from bj10906pcu1.spreadtrum.com (10.0.73.72) by BJMBX02.spreadtrum.com (10.0.64.8) with Microsoft SMTP Server (TLS) id 15.0.1497.23; Mon, 19 Feb 2024 11:20:10 +0800 From: Fangzheng Zhang To: Christoph Lameter , Pekka Enberg , David Rientjes , Joonsoo Kim , Andrew Morton , Vlastimil Babka , Roman Gushchin , Hyeonggon Yoo <42.hyeyoo@gmail.com>, Greg KH CC: , , , Fangzheng Zhang , Fangzheng Zhang , Yuming Han , Chunyan Zhang Subject: [PATCH V2 2/2] Documentation: filesystems: introduce proc/slabinfo to users Date: Mon, 19 Feb 2024 11:19:11 +0800 Message-ID: <20240219031911.10372-3-fangzheng.zhang@unisoc.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20240219031911.10372-1-fangzheng.zhang@unisoc.com> References: <20240219031911.10372-1-fangzheng.zhang@unisoc.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: SHCAS01.spreadtrum.com (10.0.1.201) To BJMBX02.spreadtrum.com (10.0.64.8) X-MAIL: SHSQR01.spreadtrum.com 41J3KDic006816 X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1791295855631514516 X-GMAIL-MSGID: 1791295855631514516 Supplement slabinfo-version 2.2 details in proc.rst, so that users can have the status of slabinfo at a glance. And mark the optimization work that will be performed on proc/slabinfo in the next step. Signed-off-by: Fangzheng Zhang --- Documentation/filesystems/proc.rst | 33 ++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) diff --git a/Documentation/filesystems/proc.rst b/Documentation/filesystems/proc.rst index 104c6d047d9b..89ab92f6be2d 100644 --- a/Documentation/filesystems/proc.rst +++ b/Documentation/filesystems/proc.rst @@ -892,6 +892,39 @@ Linux uses slab pools for memory management above page level in version 2.2. Commonly used objects have their own slab pool (such as network buffers, directory cache, and so on). +Example output. You can have all of these fields in slabinfo - version: 2.2. + +:: + + > cat /proc/slabinfo + + slabinfo - version: 2.2 + # name : tunables : slabdata + zspage 2240 2240 72 56 1 : tunables 0 0 0 : slabdata 40 40 0 0 + zs_handle 17408 17408 8 512 1 : tunables 0 0 0 : slabdata 34 34 0 0 + f2fs_xattr_entry-254:48 312 312 208 39 2 : tunables 0 0 0 : slabdata 8 8 0 1 + imsbr_flow 102 102 80 51 1 : tunables 0 0 0 : slabdata 2 2 0 0 + ...... + ext4_groupinfo_4k 312 312 208 39 2 : tunables 0 0 0 : slabdata 8 8 0 1 + dm_verity_fec_buffers 8 8 4048 8 8 : tunables 0 0 0 : slabdata 1 1 0 0 + dm_bufio_buffer 28 28 144 28 1 : tunables 0 0 0 : slabdata 1 1 0 1 + ...... + kernfs_iattrs_cache 4010 4116 96 42 1 : tunables 0 0 0 : slabdata 98 98 0 0 + kernfs_node_cache 67169 67232 128 32 1 : tunables 0 0 0 : slabdata 2101 2101 0 0 + mnt_cache 5624 5700 320 25 2 : tunables 0 0 0 : slabdata 228 228 0 0 + filp 15840 17400 320 25 2 : tunables 0 0 0 : slabdata 696 696 0 0 + ...... + kmalloc-32 30398 32384 32 128 1 : tunables 0 0 0 : slabdata 253 253 0 0 + kmalloc-16 31566 31744 16 256 1 : tunables 0 0 0 : slabdata 124 124 0 0 + kmalloc-8 51623 51712 8 512 1 : tunables 0 0 0 : slabdata 101 101 0 0 + kmem_cache_node 416 416 128 32 1 : tunables 0 0 0 : slabdata 13 13 0 0 + kmem_cache 416 416 256 32 2 : tunables 0 0 0 : slabdata 13 13 0 0 + +Note, comes from the collected results in the file +/sys/kernel/slab/$cache/reclaim_account. Next, we will mark /proc/slabinfo +as deprecated and recommend the use of either sysfs directly or +use of the "slabinfo" tool that we have been providing in linux/tools/mm. + :: > cat /proc/buddyinfo