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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> MIME-Version: 1.0 X-Originating-IP: [10.0.73.72] X-ClientProxiedBy: SHCAS01.spreadtrum.com (10.0.1.201) To BJMBX02.spreadtrum.com (10.0.64.8) X-MAIL: SHSQR01.spreadtrum.com 41J3KDic006816 X-Rspamd-Queue-Id: 8E2394000B X-Rspam-User: X-Rspamd-Server: rspam11 X-Stat-Signature: nqdbcjxzy5rx4rxppjfasks3gnsrgk7m X-HE-Tag: 1708313071-80790 X-HE-Meta: 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 N60h/XEW hWu7Ov1a43EKWOetHC5wlEJ1YVO82w0mgRlw/eFKzapoFeMJBtT26DJv3uhhA5YpIQjBiA1rGqaHI2kHSs3UCvSH9do0B17gGI4mtDJUAoXVO0x4IvmqmH6sN6oEylUMTXxPraxOQI51r5LFHXgjwwcwifd0FBD4dVwLvPcRzQwuqwSqomz4oH4U+P2YeMe6259NGKHsaBEr+ECcBrUHR4u2K9ZMHO0wWPmR2/9u1PuQ2FTaEkZktMjmjUujOLM+MMrdEQpttI63xdZI= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: 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