linux-kernel - Re: [PATCH v2 0/6] Enhance union-find with KUnit tests and optimization improvements

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Message-ID: <ZwZIXxQLyJUL_nOW@infradead.org>
Date: Wed, 9 Oct 2024 02:09:51 -0700
From: Christoph Hellwig <hch@...radead.org>
To: Kuan-Wei Chiu <visitorckw@...il.com>
Cc: xavier_qy@....com, longman@...hat.com, lizefan.x@...edance.com,
	tj@...nel.org, hannes@...xchg.org, mkoutny@...e.com,
	akpm@...ux-foundation.org, jserv@...s.ncku.edu.tw,
	linux-kernel@...r.kernel.org, cgroups@...r.kernel.org
Subject: Re: [PATCH v2 0/6] Enhance union-find with KUnit tests and
 optimization improvements

On Mon, Oct 07, 2024 at 11:28:27PM +0800, Kuan-Wei Chiu wrote:
> This patch series adds KUnit tests for the union-find implementation
> and optimizes the path compression in the uf_find() function to achieve
> a lower tree height and improved efficiency. Additionally, it modifies
> uf_union() to return a boolean value indicating whether a merge
> occurred, enhancing the process of calculating the number of groups in
> the cgroup cpuset.

Given that this fairly special union find code is obly used in the
cpuset code, please move the code there rather adding more exports.
Even as-is it is bloating every kernel build even without cgroups
for no good reason.