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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 BL02EPF00029929.mail.protection.outlook.com (10.167.249.54) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.21.181.6 via Frontend Transport; Tue, 7 Jul 2026 13:59:38 +0000 Received: from satlexmb07.amd.com (10.181.42.216) 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 15.2.2562.41; Tue, 7 Jul 2026 08:59:38 -0500 Received: from [172.31.184.125] (10.180.168.240) by satlexmb07.amd.com (10.181.42.216) with Microsoft SMTP Server id 15.2.2562.41 via Frontend Transport; Tue, 7 Jul 2026 08:59:32 -0500 Message-ID: Date: Tue, 7 Jul 2026 19:29:31 +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: kmemleak: sched_domain_shared leaked on asymmetric-capacity + SCHED_CACHE To: Breno Leitao CC: Dietmar Eggemann , Andrea Righi , Ingo Molnar , Peter Zijlstra , Juri Lelli , Vincent Guittot , Steven Rostedt , Ben Segall , Mel Gorman , Valentin Schneider , Christian Loehle , Phil Auld , Koba Ko , Felix Abecassis , Balbir Singh , Joel Fernandes , Shrikanth Hegde , References: <20260509180955.1840064-1-arighi@nvidia.com> <20260509180955.1840064-3-arighi@nvidia.com> <73685ae1-6d90-4799-a1d7-08a1fcf24b8b@amd.com> <73697ae3-f826-4b0e-be05-446976223822@amd.com> <9476c607-92bd-4f98-b9a0-c9ca559c9d91@arm.com> Content-Language: en-US From: K Prateek Nayak In-Reply-To: Content-Type: text/plain; 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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: XbEmeQUZCpNF2xhPhQOO55KJVzBi+VYbs2Vra0Cx1l72kmyQYSG79l2QQ9T/ZgKEx7qo3Tn64H5IKsbmDpVvqxvuO29d8q4hBl6VodYpdp+rdGody/gtlzvkpN3CgH5ao5oXmHXxy8Yp5UZDupvwESZpeMvvhh6loXy2fkh5ncMDJzZcrtmXcSY+8vlaWfh4MLoOoBIBe1YCThm2bDu5MW5fYykbL2mCKj3s13rJ6Oag22V4hmXinQmqbM7+jv7XzOGFGb2VJODAE95X085AP4eY+CWQQzrdY4vBmdpSZ0UZfMbSlt71oTwxll6SI1ewvnbwiRmkSi/9YfXdOFKufugmOdY5xCe1vtSxykOm8kdy3C7Af/RBHr2cx/5jGIXs27kWLacJSnjIqyYhAAxVNpnHZx7VEZaf9GGkYoW1reVhOZHUtRjCNfjKtda2YQs8 X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 07 Jul 2026 13:59:38.7655 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 4d46820d-65c0-44f7-5961-08dedc2ffc53 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: BL02EPF00029929.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY8PR12MB7516 Hello Breno, On 7/7/2026 7:01 PM, Breno Leitao wrote: >> I may have found what might be happening. Since the last SD_SHARE_LLC >> and the first SD_ASYM_CPUCAPACITY_FULL overlap, >> init_sched_domain_shared() for SD_SHARE_LLC might just be overwriting >> the assignment from claim_asym_sched_domain_shared() and we are left >> with a non-zero refcounted shared that evades claim_allocations() but >> is not used anywhere either. >> >> Breno, could you try the below diff: > > Sure, I've tested it and I don't see the kmemleak report anymore, that > solved the issue I've raised. > > Feel free to include the following if you are planning to send it to the > list: > > Tested-by: Breno Leitao Thanks a ton! I'll send out an official patch shortly for Peter to pick up once he is back from holidays after some more testing. Thank you again for the report and testing. Much appreciated _/\_ -- Thanks and Regards, Prateek