From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=198.137.202.133 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1794416058; b=1owXf8rF0nC8yhJbkQaEKywaY1dRCxmYESvRZoLSQ8jXP8KOUs5Yg+INmSPZ6/dFkW9O ujN9Jqydq5VaZwwsY9pBKrBRes3TWeRt+Z6dfdVT6NJjiDnVcKzgk7UryNwOnUwVDlQwz KADk13WaoEqjRnW94L9TjmzTjY0MbGKJJQZDMXDJwMOZ5IFjV6koJ1MqUreAVn6/tnEET qy1yPBLqKwMdgW9z1yzXYOUiGz5tLwwLOoChRXLbxE/gphzoZ9xxE8Xb9OLanQEgT6wdk XWT8V3H9hYClX3YhIAx5yOcezrXlSmG0mGs4lmuWHc9s20RfvFT9/NRF/tL+uDk0T7Q== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794416058; h=DMARC-Filter:DKIM-Signature:Received:Message-ID:Date:MIME-Version: User-Agent:Subject:To:Cc:References:Content-Language:From:In-Reply-To: Content-Type:Content-Transfer-Encoding; bh=AWueVVaXQOOVon9iyN4ebU/QYOn26L/TxhgwBah2R00=; b=q9tzLLm+AwkAAKkhbf8ijavnzrqlaq3CUVX+OT3OYknDnGZ1CiWrNzPab1Bvlmm1wro4 iVi6GgBUxFPlwPbzRUKVPLkSkCu0yGyg0JhvhOrARvpNJTVnMfvb+LnejboxOTQ5FPA2L linZUwTVvpy2quI92xX659EH+N/dUJJFiB7XVc1tRQLH2shptvCmnVoAJ99+Q2OIfJqPt bUs01NavCPO4EjjJY0K+YDAQaCEQ1NRQX/EJ5LM9oz9MJ26OrtIUSdPEQ2y8TF4n+Pxcc J1KEFNkZkKpNWBMebpLB1EsYTRtwa1Gh5cjwlZP5NaWX//kIziaxgM1f0itm5EptJfw== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass header.from=infradead.org; spf=pass smtp.mailfrom=infradead.org; dkim=pass header.d=infradead.org header.i=@infradead.org header.a=rsa-sha256 header.s=bombadil.20210309 header.b=qu0mGoUS; arc=none smtp.remote-ip=198.137.202.133 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B2A63606A321; Wed, 11 Nov 2026 16:54:17 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org B2A63606A321 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=infradead.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=infradead.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.a=rsa-sha256 header.s=bombadil.20210309 header.b=qu0mGoUS DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=Content-Transfer-Encoding: Content-Type:In-Reply-To:From:References:Cc:To:Subject:MIME-Version:Date: Message-ID:Sender:Reply-To:Content-ID:Content-Description; bh=AWueVVaXQOOVon9iyN4ebU/QYOn26L/TxhgwBah2R00=; b=qu0mGoUSRhzHrpda5PyD0v86SA 6+IoEZMyWsWwp90AqS6pw/xoqmoYO0UCpT80k6wtjponve3oRVnNd9AxvLn6ARRwF1s57ZTT+R7zl Y3L/K3vqj5zWRPVLH9VzZTBdVXP2XFU607wVokPdDcQpX/zGFCaL5JQcK42o7qdenEBl/BsyOWrnd XdA2zbLs0GSjVkGA+vEiaOXEd+AiYZR/I0qjNj9TU9qNdn7hu8bXMO2KKQeJnKD+LhTtbYUkYwFKB CCT0uYDOk9qjEtCw+q9/ZNLmSUCx5MWcfVpa0gbebMtF8ldRnfdm4XrlOIPIaFM8qiPCGAQ6FqoD0 Ht6tPksQ==; Received: from [50.53.43.113] (helo=[192.168.254.34]) by bombadil.infradead.org with esmtpsa (Exim 4.100.1 #2 (Red Hat Linux)) id 1xRBaQ-00000007FmA-3zdj; Wed, 11 Nov 2026 16:54:14 +0000 Message-ID: <60e687ca-733d-471c-b8ad-bee092efd04b@infradead.org> Date: Wed, 11 Nov 2026 08:54:13 -0800 X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 1/7] sched: Mark RT_GROUP_SCHED broken To: Sebastian Andrzej Siewior Cc: linux-kernel@vger.kernel.org, cgroups@vger.kernel.org, rcu@vger.kernel.org, linux-doc@vger.kernel.org, John Ogness , Jonathan Corbet , Shuah Khan , Ingo Molnar , Peter Zijlstra , Juri Lelli , Vincent Guittot , Dietmar Eggemann , Steven Rostedt , Ben Segall , Mel Gorman , Valentin Schneider , K Prateek Nayak , luca abeni , Yuri Andriaccio , Yuri Andriaccio , "Paul E. McKenney" , Frederic Weisbecker , Neeraj Upadhyay , Joel Fernandes , Josh Triplett , Boqun Feng , Uladzislau Rezki , Mathieu Desnoyers , Lai Jiangshan , Zqiang , Davidlohr Bueso , Tejun Heo , Johannes Weiner , =?UTF-8?Q?Michal_Koutn=C3=BD?= , Qais Yousef References: <20261110-sched_dl-v2-0-cc9399f7aeb1@linutronix.de> <20261110-sched_dl-v2-1-cc9399f7aeb1@linutronix.de> <1927ace7-86f4-463e-bdda-b3a5bc300eb2@infradead.org> <20261111133728.6RfqZWwx@linutronix.de> Content-Language: en-US From: Randy Dunlap In-Reply-To: <20261111133728.6RfqZWwx@linutronix.de> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 11/11/26 5:37 AM, Sebastian Andrzej Siewior wrote: > On 2026-11-10 09:42:00 [-0800], Randy Dunlap wrote: >>> --- a/Documentation/scheduler/sched-rt-group.rst >>> +++ b/Documentation/scheduler/sched-rt-group.rst >>> @@ -18,6 +18,11 @@ Real-Time group scheduling >>> 0. WARNING >>> ========== >>> >>> + This document applies to RT group scheduling provided by CONFIG_RT_GROUP_SCHED. >>> + If you don't use, schedule real-time tasks and experience throttling issues >> >> -ENOPARSE. Is that: >> If you don't use or schedule real-time tasks and experience throttling issues, >> >> >> >>> + please look into Documentation/scheduler/sched-deadline.rst and there for the >> >> for the >> >>> + fair_server. > > Thank you. I have now: > > If you don't use RT-group scheduling, schedule real-time tasks and experience > throttling issues please look into Documentation/scheduler/sched-deadline.rst > for the fair_server. LGTM. Thanks. -- ~Randy