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AJvYcCVFMYIcrPaUXSISP2SFCqkAll4Jy2yRR8KyLOnhD7Xorl9uSrgV2M7gX1XYt9DDfaZYI5p+oQVyNwCErUU=@vger.kernel.org X-Gm-Message-State: AOJu0Yzjydh6jmcbOW2pPG9RxueifQ+KX65BVwNFa5dE7QhPa1JULmIW 6QJ+NVtzx96+ikwgBrZpj9E/x5EJcE0KGiANFJ2VbFdL7YRvnZYTQRaXq8oP5ZL2+8RX6zcPKFt 0 X-Google-Smtp-Source: AGHT+IFwciO5QAOs/QiVqDCZYsdUuwqBkWFwbfoOlmZLRRbNYyabu5+ctk3jZHmS95EKdBS9715lNQ== X-Received: by 2002:a05:6602:14c9:b0:82d:8a8:b97 with SMTP id ca18e2360f4ac-82d08a84650mr111604239f.10.1725980157605; Tue, 10 Sep 2024 07:55:57 -0700 (PDT) Received: from [192.168.1.116] ([96.43.243.2]) by smtp.gmail.com with ESMTPSA id ca18e2360f4ac-82aa733a30asm207850639f.8.2024.09.10.07.55.56 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 10 Sep 2024 07:55:56 -0700 (PDT) Message-ID: <03b4c259-ab70-4a61-a428-82b0261752b5@kernel.dk> Date: Tue, 10 Sep 2024 08:55:56 -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 2/2] io_uring/io-wq: limit io poller cpuset to ambient one To: Felix Moessbauer Cc: asml.silence@gmail.com, linux-kernel@vger.kernel.org, io-uring@vger.kernel.org, cgroups@vger.kernel.org, dqminh@cloudflare.com, longman@redhat.com, adriaan.schmidt@siemens.com, florian.bezdeka@siemens.com References: <20240910143320.123234-1-felix.moessbauer@siemens.com> <20240910143320.123234-3-felix.moessbauer@siemens.com> Content-Language: en-US From: Jens Axboe In-Reply-To: <20240910143320.123234-3-felix.moessbauer@siemens.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 9/10/24 8:33 AM, Felix Moessbauer wrote: > The io work queue polling threads are userland threads that just never > exit to the userland. By that, they are also assigned to a cgroup (the > group of the creating task). > > When creating a new io poller, this poller should inherit the cpu limits > of the cgroup, as it belongs to the cgroup of the creating task. Same comment on polling threads and the use of ambient. -- Jens Axboe