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client-ip=165.204.84.17; helo=satlexmb08.amd.com; pr=C Received: from satlexmb08.amd.com (165.204.84.17) by SJ5PEPF000001F3.mail.protection.outlook.com (10.167.242.71) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.21.360.3 via Frontend Transport; Thu, 20 Aug 2026 17:15:08 +0000 Received: from satlexmb10.amd.com (10.181.42.219) by satlexmb08.amd.com (10.181.42.217) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.45; Thu, 20 Aug 2026 12:15:07 -0500 Received: from satlexmb07.amd.com (10.181.42.216) by satlexmb10.amd.com (10.181.42.219) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.45; Thu, 20 Aug 2026 12:15:07 -0500 Received: from [172.31.184.125] (10.180.168.240) by satlexmb07.amd.com (10.181.42.216) with Microsoft SMTP Server id 15.2.2562.45 via Frontend Transport; Thu, 20 Aug 2026 12:15:04 -0500 Message-ID: <3898f82d-e48a-48d5-a13d-54fa5387a203@amd.com> Date: Thu, 20 Aug 2026 22:45:03 +0530 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 0/2] sched: Remove sched_class::balance() To: Peter Zijlstra , Aaron Lu CC: , , , , , , , , , , , References: <20260624121327.190063948@infradead.org> <20260702114919.GA186418@bytedance.com> <20260820154052.GB4120091@noisy.programming.kicks-ass.net> Content-Language: en-US From: K Prateek Nayak In-Reply-To: <20260820154052.GB4120091@noisy.programming.kicks-ass.net> Content-Type: text/plain; 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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: orwcR1me/f8cuP6JRgZNVmsi6/b8zkAV+rKO/2CX/QyL3rDVJgG5MAeJoraXd81Mn/Or5860iORyca0YdbxE4WrR/YJN4F7JaFrqoVtxTjMORqRZx4iqVAV+9m+Q7vMBGLcmA+ddkBGaxryzUMpj68vWGaTB+szjPYT+5BlPzBGIND0VjuIDDn5MfYWlzKPUL2qnyB84VOUqpoUN4J9H5UzN5Rm0+RF/y2kyxQ/WWNJV3UO1jTv5g/U0JmeiQl/LyocaIJpLwQZPYYdY6kGnN7Oas5R4NuMoFA1DdYZlaehgjMerKmlqh3CzOQaOAsKDwVRc/kubZuTdzhhIlN6TpdxsZl56KnfROmQ2G3qd/Zf5UYVqA4BDsVyMg+tOJrqyQQKudiClxBL1pFlqcsrIf70n3qMEuUHhirpn2FOzQcK6la5n5+F5EWsNlg2sbE56 X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 20 Aug 2026 17:15:08.7638 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: c589c1f5-a8bb-4ea1-f898-08defede962d X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[satlexmb08.amd.com] X-MS-Exchange-CrossTenant-AuthSource: SJ5PEPF000001F3.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DS7PR12MB6357 On 8/20/2026 9:10 PM, Peter Zijlstra wrote: > On Thu, Jul 02, 2026 at 07:49:19PM +0800, Aaron Lu wrote: > >> The test caused a panic with below msg: > > What test do you run? I think all I have is the prctl selftest thing. Stuff that goes sideways generally shows up with: coresched new -t pid -- perf bench sched messaging -p -l 100000 -g 8 I generally consider a full run without any splats as a pass. Performance tends to vary quite a bit depending upon number of groups. -- Thanks and Regards, Prateek