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Mon, 02 Dec 2024 01:39:17 -0800 (PST) X-Google-Smtp-Source: AGHT+IGkgova0C1qUvfS9oK+GdfWOaRSM1JljNck7x9igRHWEpZoQOOADjVo+TnZfNXEZhYdN5sizA== X-Received: by 2002:a05:600c:354c:b0:434:a5e6:64f6 with SMTP id 5b1f17b1804b1-434a9dc5026mr188274585e9.11.1733132355848; Mon, 02 Dec 2024 01:39:15 -0800 (PST) Received: from jlelli-thinkpadt14gen4.remote.csb ([151.29.75.19]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-434aa7e4d42sm176375865e9.37.2024.12.02.01.39.14 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 02 Dec 2024 01:39:15 -0800 (PST) Date: Mon, 2 Dec 2024 10:39:13 +0100 From: Juri Lelli To: Michal =?iso-8859-1?Q?Koutn=FD?= Cc: Ingo Molnar , Peter Zijlstra , Vincent Guittot , Dietmar Eggemann , Steven Rostedt , Ben Segall , Mel Gorman , Valentin Schneider , linux-kernel@vger.kernel.org, Luca Abeni , Tommaso Cucinotta , Thomas Gleixner , Joel Fernandes , Vineeth Pillai , Shuah Khan , Phil Auld , Suleiman Souhlal Subject: Re: [PATCH V7 9/9] sched/rt: Remove default bandwidth control Message-ID: References: <14d562db55df5c3c780d91940743acb166895ef7.1716811044.git.bristot@kernel.org> <2aqeakf4rbed2hnt46yvdospzntpvp7ndrk4xnv6rrh7ctijes@d3nzwnguheju> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <2aqeakf4rbed2hnt46yvdospzntpvp7ndrk4xnv6rrh7ctijes@d3nzwnguheju> On 29/11/24 21:21, Michal Koutný wrote: > On Fri, Nov 29, 2024 at 03:44:53PM GMT, Juri Lelli wrote: > > You can disable admission control by echoing -1 in sched_rt_runtime_us, > > but still have the dl_server working for SCHED_NORMAL tasks. By > > disabling admission control SCHED_DEADLINE can indeed monopolize CPU > > (over subscription). > > | I'm wondering if different values of Δ mean anything or how they can > | be used. > > Aha, the knob therefore remains relevant for the DL admission control. > > So if I put it together, I will write it down like this: Ah, yes sounds good to me, thanks for writing it down properly! :) If you send it out as a separate patch, please feel free to add Acked-by: Juri Lelli Best, Juri