linux-kernel - Re: [PATCH V2 0/2] Introduce slabinfo version 2.2

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Date: Mon, 19 Feb 2024 19:29:41 +0800
From: Chengming Zhou <zhouchengming@...edance.com>
To: Fangzheng Zhang <fangzheng.zhang@...soc.com>,
 Christoph Lameter <cl@...ux.com>, Pekka Enberg <penberg@...nel.org>,
 David Rientjes <rientjes@...gle.com>, Joonsoo Kim <iamjoonsoo.kim@....com>,
 Andrew Morton <akpm@...ux-foundation.org>, Vlastimil Babka <vbabka@...e.cz>,
 Roman Gushchin <roman.gushchin@...ux.dev>,
 Hyeonggon Yoo <42.hyeyoo@...il.com>, Greg KH <gregkh@...uxfoundation.org>
Cc: linux-mm@...ck.org, linux-kernel@...r.kernel.org, tkjos@...gle.com,
 Fangzheng Zhang <fangzheng.zhang1003@...il.com>,
 Yuming Han <yuming.han@...soc.com>, Chunyan Zhang <zhang.lyra@...il.com>
Subject: Re: [PATCH V2 0/2] Introduce slabinfo version 2.2

On 2024/2/19 11:19, Fangzheng Zhang wrote:
> Hi all,
> 
> This series introduces slabinfo version 2.2 to users.
> In slabinfo V2.2, we added a slabreclaim column to
> record whether each slab pool is of reclaim type.
> This will be more conducive for users to obtain
> the type of each slabdata more intuitively than through
> the interface /sys/kernel/slab/$cache/reclaim_account.

I want to recommend a better tool: drgn[1] for these tasks, instead of changing
the output format of /proc/slabinfo, which may break existing userspace tools.

[1] https://drgn.readthedocs.io/en/latest/index.html#

> And we have added an example of the output result
> executing '> cat proc/slabinfo' in the file
> Documentation/filesystems/proc.rst.
> 
> Changes in v2:
> - Modify the slabinfo version number to 2.2.
> - Add an example of slabinfo output and future works.
> 
> Changes in v1:
> - Add a slabreclaim column to record type of each slab
>   in file proc/slabinfo.
> 
> [1] https://lore.kernel.org/linux-mm/20240131094442.28834-1-fangzheng.zhang@unisoc.com/
> 
> Fangzheng Zhang (2):
>   mm/slab: Add slabreclaim flag to slabinfo
>   Documentation: filesystems: introduce proc/slabinfo to users
> 
>  Documentation/filesystems/proc.rst | 33 ++++++++++++++++++++++++++++++
>  mm/slab_common.c                   |  9 ++++----
>  2 files changed, 38 insertions(+), 4 deletions(-)
>