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Tue, 31 Mar 2026 15:09:02 -0700 (PDT) Received: from [192.168.1.14] ([38.175.187.108]) by smtp.gmail.com with ESMTPSA id 5614622812f47-46aa03e4acesm7551638b6e.17.2026.03.31.15.09.02 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 31 Mar 2026 15:09:02 -0700 (PDT) Message-ID: Date: Tue, 31 Mar 2026 16:09:01 -0600 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] selftests/cpu-hotplug: Fix check for cpu hotplug not supported To: Dmytro Maluka , Shuah Khan , Jihed Chaibi , "open list:KERNEL SELFTEST FRAMEWORK" , open list , Shuah Khan References: <20260319153825.2813576-1-dmaluka@chromium.org> Content-Language: en-US From: Shuah Khan In-Reply-To: <20260319153825.2813576-1-dmaluka@chromium.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 3/19/26 09:38, Dmytro Maluka wrote: > If CONFIG_HOTPLUG_CPU is disabled, /sys/devices/system/cpu/cpu* > directories are still populated, so the test fails to correctly detect > that CPU hotplug is not supported. > > Fix this by checking for the presence of 'online' files in those > directories instead. The 'online' node is created for the given CPU if > and only if this CPU supports hotplug. So if none of the CPUs have > 'online' nodes, it means CPU hotplug is not supported. > > Signed-off-by: Dmytro Maluka > --- Applied to linux_kselftest next for Linux 7.1-rc1. thanks, -- Shuah