linux-kernel - Re: [PATCH -next RFC -v2 00/11] Refactor cpus mask setting

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Message-ID: <3861018c-96a2-4055-94ca-39f7a8e631f3@huaweicloud.com>
Date: Mon, 15 Sep 2025 19:18:35 +0800
From: Chen Ridong <chenridong@...weicloud.com>
To: longman@...hat.com, tj@...nel.org, hannes@...xchg.org, mkoutny@...e.com
Cc: cgroups@...r.kernel.org, linux-kernel@...r.kernel.org,
 lujialin4@...wei.com, chenridong@...wei.com
Subject: Re: [PATCH -next RFC -v2 00/11] Refactor cpus mask setting



On 2025/9/9 11:32, Chen Ridong wrote:
> From: Chen Ridong <chenridong@...wei.com>
> 
> This patch series refactors the CPU mask configuration logic for both
> cpuset.cpus and cpuset.cpus.exclusive settings. The primary goal is to
> improve code readability through comprehensive function restructuring.
> 
> The CPU mask update process follows these steps:
> 1. Parse user input
> 2. Skip processing if no actual change to CPU mask
> 3. Compute trial cpuset's effective exclusive CPUs
> 4. Validate changes and return error if invalid
> 5. Handle partition state changes resulting from CPU mask modifications
> 6. Apply new CPU mask to the cpuset
> 7. Propagate changes through the hierarchy
> 
> The series is organized as follows:
> patches 1-3: Code cleanup and preparation for refactoring
> patches 4-9: Refactoring of cpuset.cpus configuration logic
> patches 10-11: Refactoring of cpuset.cpus.exclusive configuration logic
> 
> ---
> 
> Changes from v1:
> - Patch 1: Use direct comparison (cs == &top_cpuset) instead of the
>            cpuset_is_root() helper function
> - Patch 6: Updated comments for better clarity
> - Patch 7: Refactored validate_partition to replace the previous
>            invalidate_cs_partition implementation
> - Patch 8: Renamed acpus_validate_change to cpus_allowed_validate_change
> - Patch 9: Updated commit message with more detailed information
> 

Hi, Longman,

I would be grateful if you could take a look at this series when you have a moment.

-- 
Best regards,
Ridong