linux-kernel - Re: [PATCH -next] cgroup: increase maximum subsystem count from 16 to 32

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Message-ID: <026a6cd3-1b77-430f-9c4e-8ea0782ed94c@huaweicloud.com>
Date: Thu, 29 Jan 2026 15:22:49 +0800
From: Chen Ridong <chenridong@...weicloud.com>
To: tj@...nel.org, hannes@...xchg.org, mkoutny@...e.com, rostedt@...dmis.org,
 mhiramat@...nel.org, mathieu.desnoyers@...icios.com, inwardvessel@...il.com,
 shakeel.butt@...ux.dev
Cc: cgroups@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-trace-kernel@...r.kernel.org, lujialin4@...wei.com
Subject: Re: [PATCH -next] cgroup: increase maximum subsystem count from 16 to
 32



On 2026/1/29 14:31, Chen Ridong wrote:
> The current cgroup subsystem limit of 16 is insufficient, as the number of
> subsystems has already reached this maximum. Attempting to add new
> subsystems beyond this limit results in boot failures.

We found this issue because our product includes a subsystem not present in the
community version, causing the total number of subsystems to exceed 16. When all
subsystems are enabled, the system fails to boot.

-- 
Best regards,
Ridong