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Wed, 8 Oct 2025 03:04:51 +0000 Message-ID: <1b352ad2-e542-4005-a470-5a9bb94b7ad8@intel.com> Date: Tue, 7 Oct 2025 20:04:49 -0700 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] x86/resctrl: Fix buggy overflow when reactivating previously Unavailable RMID To: "Moger, Babu" , Babu Moger , , , , , , , CC: , , , , , References: <515a38328989e48d403ef5a7d6dd321ba3343a61.1759791957.git.babu.moger@amd.com> <3e1b459a-bd9a-400b-8c10-038b330e539f@amd.com> Content-Language: en-US From: Reinette Chatre In-Reply-To: <3e1b459a-bd9a-400b-8c10-038b330e539f@amd.com> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit X-ClientProxiedBy: MW4PR03CA0161.namprd03.prod.outlook.com (2603:10b6:303:8d::16) To SJ2PR11MB7573.namprd11.prod.outlook.com (2603:10b6:a03:4d2::10) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SJ2PR11MB7573:EE_|DM6PR11MB4692:EE_ X-MS-Office365-Filtering-Correlation-Id: 02413e57-bb40-4ecd-4934-08de06177304 X-LD-Processed: 46c98d88-e344-4ed4-8496-4ed7712e255d,ExtAddr X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|366016|1800799024|376014|7416014|921020; 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If everything goes well, this patch needs to >>> go to all the stable kernels. >> >> Needs a "Fixes" and "Cc: stable@vger.kernel.org"? > > Hmm.. Not sure. Which commit to add Fixes in. This is AMD related. > We should have taken care when adding support to AMD. Does this commit make sense? > > Fixes: 4d05bf71f157d ("x86/resctrl: Introduce AMD QOS feature") This seems fair. From what I can tell this spans all LTS kernels so I expect a couple of different variants of this fix since this code has evolved quite a lot. Do you want this fix backported to all the LTS kernels? It may be useful to add a note to the stable team that this patch needs changes to apply to all kernel versions (see "Point out known problems" in Documentation/process/stable-kernel-rules.rst) >> This patch will only apply to upstream though so would need backporting >> support. Will you be able to support this? > > Yes. I can do that. Thank you very much. Reinette