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Sun, 02 Mar 2025 19:31:34 -0800 (PST) Received: from [10.254.225.63] ([139.177.225.243]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-223501fd28dsm67664885ad.94.2025.03.02.19.31.25 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sun, 02 Mar 2025 19:31:33 -0800 (PST) Message-ID: <033b4ec3-cbbd-4aa8-b25b-3bb4bdbaced9@bytedance.com> Date: Mon, 3 Mar 2025 11:30:07 +0800 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: Re: [PATCH v2 0/2] Fix SCHED_IDLE behavior on wakeup preemption To: K Prateek Nayak , Madadi Vineeth Reddy , Phil Auld , Ingo Molnar , Peter Zijlstra , Juri Lelli , Vincent Guittot , Dietmar Eggemann , Steven Rostedt , Ben Segall , Mel Gorman , Valentin Schneider , Josh Don , Tianchen Ding Cc: "open list:SCHEDULER" References: <20250227085815.18131-1-wuyun.abel@bytedance.com> <3ce5065e-8b9b-46a8-b7c1-5f9b8f118b06@amd.com> Content-Language: en-US From: Abel Wu In-Reply-To: <3ce5065e-8b9b-46a8-b7c1-5f9b8f118b06@amd.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit On 2/28/25 4:05 PM, K Prateek Nayak wrote: > Hello Abel, > > On 2/27/2025 2:28 PM, Abel Wu wrote: >> The commit 6bc912b71b6f ("sched: SCHED_OTHER vs SCHED_IDLE isolation") >> defines the behavior of SCHED_IDLE as following: >> >>   - no SCHED_IDLE buddies >>   - never let SCHED_IDLE preempt on wakeup >>   - always preempt SCHED_IDLE on wakeup >>   - limit SLEEPER fairness for SCHED_IDLE >> >> and the middle two of them are broken now. > > Feel free to include: > > Tested-by: K Prateek Nayak Thanks!