linux-kernel - Re: [PATCH v1 00/31] x86/resctrl: Move the resctrl filesystem code to /fs/resctrl

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Message-ID: <ZiE8/oXyjBef2qTy@e133380.arm.com>
Date: Thu, 18 Apr 2024 16:32:14 +0100
From: Dave Martin <Dave.Martin@....com>
To: Reinette Chatre <reinette.chatre@...el.com>
Cc: James Morse <james.morse@....com>, x86@...nel.org,
	linux-kernel@...r.kernel.org, Fenghua Yu <fenghua.yu@...el.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
	H Peter Anvin <hpa@...or.com>, Babu Moger <Babu.Moger@....com>,
	shameerali.kolothum.thodi@...wei.com,
	D Scott Phillips OS <scott@...amperecomputing.com>,
	carl@...amperecomputing.com, lcherian@...vell.com,
	bobo.shaobowang@...wei.com, tan.shaopeng@...itsu.com,
	baolin.wang@...ux.alibaba.com, Jamie Iles <quic_jiles@...cinc.com>,
	Xin Hao <xhao@...ux.alibaba.com>, peternewman@...gle.com,
	dfustini@...libre.com, amitsinght@...vell.com,
	David Hildenbrand <david@...hat.com>,
	Rex Nie <rex.nie@...uarmicro.com>
Subject: Re: [PATCH v1 00/31] x86/resctrl: Move the resctrl filesystem code
 to /fs/resctrl

Hi Reinette,

Since we seem to be getting to the end of the outstanding discussion on
this series, what's your preference for moving this forward?

James will be back towards the end of next week AIUI, so it should be
possible to apply most of the changes that have been discussed and post
a v2 for review fairly quickly after that.

I'm happy to apply my fixups branch and post an untested "v1.1" for
review if you think it would be useful to see the de-noised output of
the review so far, but I don't want to fork the discussion or create
unnecessary work.  This interim respin would be subject to what James
wants to pick up.

Alternatively, I can try to follow up on the string parsing discussion
from patch #3 with some real code if you'd prefer to get a clean
interface in place for that.

Cheers
---Dave


On Mon, Apr 08, 2024 at 08:13:19PM -0700, Reinette Chatre wrote:
> Hi James and x86 Maintainers,
> 
> Please consider the file movements as captured in the diffstat below:
> 
> On 3/21/2024 9:50 AM, James Morse wrote:
> >  MAINTAINERS                               |    2 +
> >  arch/Kconfig                              |    8 +
> >  arch/x86/Kconfig                          |    5 +-
> >  arch/x86/include/asm/resctrl.h            |   45 +-
> >  arch/x86/kernel/cpu/resctrl/Makefile      |    5 +-
> >  arch/x86/kernel/cpu/resctrl/core.c        |  119 +-
> >  arch/x86/kernel/cpu/resctrl/ctrlmondata.c |  506 +--
> >  arch/x86/kernel/cpu/resctrl/internal.h    |  433 +--
> >  arch/x86/kernel/cpu/resctrl/monitor.c     |  813 +----
> >  arch/x86/kernel/cpu/resctrl/pseudo_lock.c | 1126 +-----
> >  arch/x86/kernel/cpu/resctrl/rdtgroup.c    | 3929 +-------------------
> >  arch/x86/kernel/process_32.c              |    2 +-
> >  arch/x86/kernel/process_64.c              |    2 +-
> >  fs/Kconfig                                |    1 +
> >  fs/Makefile                               |    1 +
> >  fs/resctrl/Kconfig                        |   23 +
> >  fs/resctrl/Makefile                       |    3 +
> >  fs/resctrl/ctrlmondata.c                  |  527 +++
> >  fs/resctrl/internal.h                     |  340 ++
> >  fs/resctrl/monitor.c                      |  843 +++++
> >  fs/resctrl/psuedo_lock.c                  | 1122 ++++++
> 
> (sidenote: James, please note typo in psuedo_lock.c)
> 
> >  fs/resctrl/rdtgroup.c                     | 4013 +++++++++++++++++++++
> >  include/linux/resctrl.h                   |  153 +-
> >  include/linux/resctrl_types.h             |   98 +
> >  24 files changed, 7244 insertions(+), 6875 deletions(-)
> >  create mode 100644 fs/resctrl/Kconfig
> >  create mode 100644 fs/resctrl/Makefile
> >  create mode 100644 fs/resctrl/ctrlmondata.c
> >  create mode 100644 fs/resctrl/internal.h
> >  create mode 100644 fs/resctrl/monitor.c
> >  create mode 100644 fs/resctrl/psuedo_lock.c
> >  create mode 100644 fs/resctrl/rdtgroup.c
> >  create mode 100644 include/linux/resctrl_types.h
> 
> I would like to check in on the sentiments regarding maintaining the resctrl
> contributions after this work is merged. Considering that resctrl will 
> be split between fs/resctrl and arch/x86, would it still be acceptable for
> resctrl code to both areas (filesystem as well as arch) to flow via the tip tree with
> help from x86 maintainers?
> 
> How will Arm patches flow?
> 
> James, are you planning a separate MAINTAINERS entry for the Arm specific code?
> I would like to propose that you add yourself as a reviewer to the existing resctrl
> MAINTAINERS entry to learn when any changes are submitted that may impact Arm. 
> 
> Reinette
> 
>