linux-kernel - Re: [PATCH v6 0/3] x86/resctrl: Implement rename to help move containers' tasks

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Date:   Wed, 3 May 2023 09:50:22 -0500
From:   "Moger, Babu" <babu.moger@....com>
To:     Peter Newman <peternewman@...gle.com>, fenghua.yu@...el.com,
        reinette.chatre@...el.com
Cc:     bp@...en8.de, dave.hansen@...ux.intel.com, eranian@...gle.com,
        gupasani@...gle.com, hpa@...or.com, james.morse@....com,
        linux-kernel@...r.kernel.org, mingo@...hat.com, skodak@...gle.com,
        tglx@...utronix.de, tony.luck@...el.com, x86@...nel.org
Subject: Re: [PATCH v6 0/3] x86/resctrl: Implement rename to help move
 containers' tasks

Tested the series. Looks good.

Tested-by: Babu Moger <babu.moger@....com>

On 4/19/23 07:50, Peter Newman wrote:
> Hi Reinette, Fenghua,
> 
> This patch series implements the solution Reinette suggested in the
> earlier RFD thread[1] for the problem of moving a container's tasks to a
> different control group on systems that don't provide enough CLOSIDs to
> give every container its own control group.
> 
> This patch series assumes that a MON group's CLOSID can simply be
> changed to that of a new parent CTRL_MON group. This is allowed on Intel
> and AMD, but not MPAM implementations. While we (Google) only foresee
> needing this functionality on Intel and AMD systems, this series should
> hopefully be a good starting point for supporting MPAM.
> 
> Thanks!
> -Peter
> 
> Updates:
> 
> v6:
>  - rebase to v6.3-rc7
>  - clarify changelog wording
>  - clarify error message for non-directory move
>  - remove unneeded parenthesis for checkpatch.pl --strict
>  - add Reviewed-By's from Reinette
> 
> v5:
>  - rebase to v6.3-rc4
>  - dropped rdt_move_group_tasks() task filter patch
>  - code/comment clarifications and errno updates requested by Reinette
>  - added Documentation patch
> 
> v4:
>  - rebase to v6.2
>  - commit message updates suggested by Reinette
>  - replace rdt_move_one_task() patch with rdt_move_group_tasks() filter
>    function patch
>  - prevent rename on files or renaming to "mon_groups"
>  - optimize simple rename case
>  - disallow renaming groups with non-empty cpumask
>  - ensure source is a proper MON group directory
>  - fix missing rdtgrp->closid update
>  - add more last_command_status output
> 
> v3: use revised task CLOSID/RMID update IPI sync method from [3]
> v2: reworded change logs based on what I've learned from review comments
>     in another patch series[2]
> 
> [v1] https://lore.kernel.org/lkml/20221115154515.952783-1-peternewman@google.com/
> [v2] https://lore.kernel.org/lkml/20221129120149.1035444-1-peternewman@google.com/
> [v3] https://lore.kernel.org/lkml/20230125101334.1069060-1-peternewman@google.com/
> [v4] https://lore.kernel.org/lkml/20230308131452.383914-1-peternewman@google.com/
> [v5] https://lore.kernel.org/lkml/20230330135558.1019658-1-peternewman@google.com/
> 
> [1] https://lore.kernel.org/lkml/7b09fb62-e61a-65b9-a71e-ab725f527ded@intel.com/
> [2] https://lore.kernel.org/lkml/54e50a9b-268f-2020-f54c-d38312489e2f@intel.com/
> [3] https://lore.kernel.org/lkml/20221220161123.432120-1-peternewman@google.com/
> 
> Peter Newman (3):
>   x86/resctrl: Factor rdtgroup lock for multi-file ops
>   x86/resctrl: Implement rename op for mon groups
>   Documentation/x86: Documentation for MON group move feature
> 
>  Documentation/x86/resctrl.rst          |   7 ++
>  arch/x86/kernel/cpu/resctrl/rdtgroup.c | 163 +++++++++++++++++++++++--
>  2 files changed, 157 insertions(+), 13 deletions(-)
> 
> 
> base-commit: 6a8f57ae2eb07ab39a6f0ccad60c760743051026

-- 
Thanks
Babu Moger