linux-kernel - Re: [PATCH v3 -next 00/15] sysctl: move sysctls from vm

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Message-ID: <ngknhtecptqk56gtiikvb5mdujhtxdyngzndiaz7ifslzrki7q@4wcykosdnsna>
Date: Mon, 21 Oct 2024 09:22:45 +0200
From: Joel Granados <j.granados@...sung.com>
To: Kaixiong Yu <yukaixiong@...wei.com>
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Subject: Re: [PATCH v3 -next 00/15] sysctl: move sysctls from vm_table into
 its own files

On Thu, Oct 10, 2024 at 11:22:00PM +0800, Kaixiong Yu wrote:
> This patch series moves sysctls of vm_table in kernel/sysctl.c to
> places where they actually belong, and do some related code clean-ups.
> After this patch series, all sysctls in vm_table have been moved into its
> own files, meanwhile, delete vm_table.
> 
> All the modifications of this patch series base on
> linux-next(tags/next-20241010). To test this patch series, the code was
> compiled with both the CONFIG_SYSCTL enabled and disabled on arm64 and
> x86_64 architectures. After this patch series is applied, all files
> under /proc/sys/vm can be read or written normally.
> 
> Changes in v3:
>  - change patch1~10, patch14 title suggested by Joel Granados
>  - change sysctl_stat_interval to static type in patch1
>  - add acked-by from Paul Moore in patch7
>  - change dirtytime_expire_interval to static type in patch9
>  - add acked-by from Anna Schumaker in patch11
> 
> Changes in v2:
>  - fix sysctl_max_map_count undeclared issue in mm/nommu.c for patch6
>  - update changelog for patch7/12, suggested by Kees/Paul
>  - fix patch8, sorry for wrong changes and forget to built with NOMMU
>  - add reviewed-by from Kees except patch8 since patch8 is wrong in v1
>  - add reviewed-by from Jan Kara, Christian Brauner in patch12
> 
> Kaixiong Yu (15):
>   mm: vmstat: move sysctls to mm/vmstat.c
>   mm: filemap: move sysctl to mm/filemap.c
>   mm: swap: move sysctl to mm/swap.c
>   mm: vmscan: move vmscan sysctls to mm/vmscan.c
>   mm: util: move sysctls to mm/util.c
>   mm: mmap: move sysctl to mm/mmap.c
>   security: min_addr: move sysctl to security/min_addr.c
>   mm: nommu: move sysctl to mm/nommu.c
>   fs: fs-writeback: move sysctl to fs/fs-writeback.c
>   fs: drop_caches: move sysctl to fs/drop_caches.c
>   sunrpc: use vfs_pressure_ratio() helper
>   fs: dcache: move the sysctl to fs/dcache.c
>   x86: vdso: move the sysctl to arch/x86/entry/vdso/vdso32-setup.c
>   sh: vdso: move the sysctl to arch/sh/kernel/vsyscall/vsyscall.c
>   sysctl: remove unneeded include
> 
>  arch/sh/kernel/vsyscall/vsyscall.c |  14 ++
>  arch/x86/entry/vdso/vdso32-setup.c |  16 ++-
>  fs/dcache.c                        |  21 ++-
>  fs/drop_caches.c                   |  23 ++-
>  fs/fs-writeback.c                  |  30 ++--
>  include/linux/dcache.h             |   7 +-
>  include/linux/mm.h                 |  23 ---
>  include/linux/mman.h               |   2 -
>  include/linux/swap.h               |   9 --
>  include/linux/vmstat.h             |  11 --
>  include/linux/writeback.h          |   4 -
>  kernel/sysctl.c                    | 221 -----------------------------
>  mm/filemap.c                       |  18 ++-
>  mm/internal.h                      |  10 ++
>  mm/mmap.c                          |  54 +++++++
>  mm/nommu.c                         |  15 +-
>  mm/swap.c                          |  16 ++-
>  mm/swap.h                          |   1 +
>  mm/util.c                          |  67 +++++++--
>  mm/vmscan.c                        |  23 +++
>  mm/vmstat.c                        |  44 +++++-
>  net/sunrpc/auth.c                  |   2 +-
>  security/min_addr.c                |  11 ++
>  23 files changed, 330 insertions(+), 312 deletions(-)
> 
> -- 
> 2.34.1
> 
General comment for the patchset in general. I would consider making the
new sysctl tables const. There is an effort for doing this and it has
already lanted in linux-next. So if you base your patch from a recent
next release, then it should just work. If you *do* decide to add a
const qualifier, then note that you will create a dependency with the
sysctl patchset currently in next and that will have to go in before.

Best

-- 

Joel Granados