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AJvYcCUAeJyYsmPLoUF084RjX5Tt1KlVy3BOB3OI+9zIpPgnYsIBAeu0M869MZEqX0MuGsBoJQC/CSQP/Q==@vger.kernel.org X-Gm-Message-State: AOJu0Ywzlu3j2D4pwfIsE2SZW8iyddg2lRsSHwSb98HPlAgXSiyZyTVn QEQryZlaQk535yK+mjGgWTb7fSNIoZ9refOm1n2mrsyE/G+QHy7NEPM+P9X/m8A= X-Google-Smtp-Source: AGHT+IEvd2jWK6AbqOEXtcOcRMgffXGRbsFWC1ymbvQmWwpnadQlLSPtVyBn+FRcmaDqcgaSeIBSdA== X-Received: by 2002:a05:6a00:3213:b0:717:83bc:6df3 with SMTP id d2e1a72fcca58-71783bc6f5cmr23496474b3a.11.1725894580245; Mon, 09 Sep 2024 08:09:40 -0700 (PDT) Received: from [127.0.0.1] ([198.8.77.157]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-718e58c1d6esm3632805b3a.75.2024.09.09.08.09.39 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 09 Sep 2024 08:09:39 -0700 (PDT) From: Jens Axboe 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, stable@vger.kernel.org In-Reply-To: <20240909150036.55921-1-felix.moessbauer@siemens.com> References: <20240909150036.55921-1-felix.moessbauer@siemens.com> Subject: Re: [PATCH 1/1] io_uring/sqpoll: do not allow pinning outside of cpuset Message-Id: <172589457900.297669.16381515839828801822.b4-ty@kernel.dk> Date: Mon, 09 Sep 2024 09:09:39 -0600 Precedence: bulk X-Mailing-List: io-uring@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-Mailer: b4 0.14.1 On Mon, 09 Sep 2024 17:00:36 +0200, Felix Moessbauer wrote: > The submit queue polling threads are userland threads that just never > exit to the userland. When creating the thread with IORING_SETUP_SQ_AFF, > the affinity of the poller thread is set to the cpu specified in > sq_thread_cpu. However, this CPU can be outside of the cpuset defined > by the cgroup cpuset controller. This violates the rules defined by the > cpuset controller and is a potential issue for realtime applications. > > [...] Applied, thanks! [1/1] io_uring/sqpoll: do not allow pinning outside of cpuset commit: f011c9cf04c06f16b24f583d313d3c012e589e50 Best regards, -- Jens Axboe