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([2620:10d:c090:500::2:15ff]) by smtp.gmail.com with ESMTPSA id a92af1059eb24-124a9d7f789sm8300091c88.6.2026.01.29.17.24.59 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 29 Jan 2026 17:25:00 -0800 (PST) Message-ID: Date: Thu, 29 Jan 2026 17:24:58 -0800 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH -next] cgroup: increase maximum subsystem count from 16 to 32 To: Chen Ridong , tj@kernel.org, hannes@cmpxchg.org, mkoutny@suse.com, rostedt@goodmis.org, mhiramat@kernel.org, mathieu.desnoyers@efficios.com, shakeel.butt@linux.dev Cc: cgroups@vger.kernel.org, linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, lujialin4@huawei.com References: <20260129063133.209874-1-chenridong@huaweicloud.com> Content-Language: en-US From: JP Kobryn In-Reply-To: <20260129063133.209874-1-chenridong@huaweicloud.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Hi Chen, On 1/28/26 10:31 PM, Chen Ridong wrote: > From: Chen Ridong > > 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. > > This patch increases the maximum number of supported cgroup subsystems from > 16 to 32, providing adequate headroom for future subsystem additions. > > Signed-off-by: Chen Ridong > --- [...] I gave this a run with with 32 controllers enabled (16 pre-existing, 16 custom) and can confirm it works as expected. Tested-by: JP Kobryn Acked-by: JP Kobryn