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Shenoy" , K Prateek Nayak Subject: [PATCH v3 1/8] sched/topology: Compute sd_weight considering cpuset partitions Date: Tue, 20 Jan 2026 11:32:39 +0000 Message-ID: <20260120113246.27987-2-kprateek.nayak@amd.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260120113246.27987-1-kprateek.nayak@amd.com> References: <20260120113246.27987-1-kprateek.nayak@amd.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-ClientProxiedBy: satlexmb08.amd.com (10.181.42.217) To satlexmb07.amd.com (10.181.42.216) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BL02EPF00021F6E:EE_|MW3PR12MB4490:EE_ X-MS-Office365-Filtering-Correlation-Id: c5430313-09af-42ba-e869-08de5817ba7c X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|82310400026|36860700013|1800799024|7416014|376014; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?C7HdqrwpSoylsti2FZTRy36ZFY3cFwktsM4FFAhjBs1GwnMtr26ZTRNS2Db1?= =?us-ascii?Q?+u4w8d/kK5ekiXxy4HPDEF/wRuBi4Qdg4gEPP3c8SJuGJaeEFJFzaixp+gw6?= =?us-ascii?Q?yIuIV11H7bWOMkXycJ/EWoh48oXPAtOwWWrfNgheTesX6DXax7Odg+AbCAO7?= =?us-ascii?Q?Xeqtb2zxuqi75T0BZUArej48XtndX1aWsDpZ34TPrBJ1zoCe7Cg66+DC7qRG?= =?us-ascii?Q?zfWCI8lKnbXKOTyQt0m8f+JJcLhNl1SiV1huNgk/LGBpksBcj6RJ52XV+qqw?= =?us-ascii?Q?jOF556GUmjiz3yVhUAdm86P8ycjCS8tj2mthxrWZRXAJU2QJAbP6qWDTGNGv?= =?us-ascii?Q?/ySivq9QEPwGVm1aKupIoyoiAhxCDHJ3ozT3wZO4PA1h2L5bSZeVAw3PAFSh?= =?us-ascii?Q?TYG6szK6bkSb78CSsLFAYyK2QlO3G9gA3PIinQ1+Nerg2OS+yxH6c2sgv2yJ?= =?us-ascii?Q?IIiAJ9+1ODwZ3dI2MvjoyfwdyhXV6o1qhqH3vq3VepcXmlNwoCa/4yxmPBIS?= =?us-ascii?Q?Ou+ZrDYFLtXIHIvdC2IU5SeGSd7I48/eqjwGDsxItdc/pxQB0EUCbJjD0PLg?= =?us-ascii?Q?hdg6/o/HGccWQWb8q2FI8PMwwJd8MiYd5vMm8XY1L0Y00O4vBRiu9/iF6Psc?= =?us-ascii?Q?hg9GI/BG9tFOD0MXnpDzYy2BZHBqIAs/2OZHwjLiZSDrVOLL/Rx9LPTvnHgj?= =?us-ascii?Q?R7LfkXrj+0Ka5NwVCwN9AgyLJZNaEhjOxKoKZDh8BcFT6mxnga0SODJwORBJ?= =?us-ascii?Q?jiM+cRJ2HX+HbYfsUhWO3SzEfEHQjaqNqkhmCsv6K+x+48oUUSrnUueEFh1l?= =?us-ascii?Q?tQXdvRHGVXElpC1Ff/gVPuuUA3IAPcif+j69QkJBmzioGvggD/dEptsIvpsK?= =?us-ascii?Q?SiByRshf4x/jY4J8Kvm+Iti0g2ZtbVWnnO5UQsyYvQU3j4W7W9Tvg44g9vJx?= =?us-ascii?Q?CKnUwvMBLbTIsSo2b1LJ0Ozf+KSbdtn0nxOmpt6RimHBKDozkkbbmvzTlS88?= =?us-ascii?Q?z+PI5BW9v8/W+CA12/ZZAs2t9CLcdebx46BPniDgUJUY+Mc7L33VxOCUr39b?= =?us-ascii?Q?xx1GP9M8Vn/WS1KkVhlaqhoYBz4nLDPyX/aZvFrFLxx9KxWC0MTGufxEAo21?= =?us-ascii?Q?lGyXz1o0yWItuAyxTNW5P+2WzKlXQb1FKflONAwJqWH/RZYHF+lJPxauszZV?= =?us-ascii?Q?rrwL5FufkYnrDjTkw+tBYnC0pGqRZ5zJacjKPMviPfXASQg/rQrjv+6yAnt5?= =?us-ascii?Q?o8m9XI4K1MdYtNj15o+IhkymfzlSNWxF7yVNR1g/XRjAijHHOlDGbihzIe4D?= =?us-ascii?Q?O/JxuufGpCXk5UY4xFZKNLe6BRHQq6RvGgzwB4I2HIJcSl1na+QO3cilHGSE?= =?us-ascii?Q?4qf0RCpcc1J1jABWDkKrJ1e/DnSwnfNQRKXy2sT/wCOC8CI4G4LDbgfaA00d?= =?us-ascii?Q?6Pdgx5OrQrF+nsRNGwJ3G1nnuGuyroYPKH5H/cQTLx/4wWiukpT3IrV4FwFm?= =?us-ascii?Q?/UQlUf8vUN1FC8V2jte3jr+lsZNYyDzr4h+MEJ611jGuXVGpfNlGv5pbSmN/?= =?us-ascii?Q?f1kI7Z++LhHhpMrGPWGGf9a7mTiyxUC1vh9zrYMmBiDwo7Nh86+5FojmzuHJ?= =?us-ascii?Q?G6kwIJvpSwDWiCDK5/IxYR8rIjBBsN7vjui5+n56Yfq5aJSZWGLIQ56KKGTG?= =?us-ascii?Q?kYwSfw=3D=3D?= X-Forefront-Antispam-Report: CIP:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:satlexmb07.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230040)(82310400026)(36860700013)(1800799024)(7416014)(376014);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 20 Jan 2026 11:33:26.8988 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: c5430313-09af-42ba-e869-08de5817ba7c 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=[satlexmb07.amd.com] X-MS-Exchange-CrossTenant-AuthSource: BL02EPF00021F6E.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: MW3PR12MB4490 Content-Type: text/plain; charset="utf-8" The "sd_weight" used for calculating the load balancing interval, and its limits, considers the span weight of the entire topology level without accounting for cpuset partitions. Compute the "sd_weight" after computing the "sd_span" considering the cpu_map covered by the partition, and set the load balancing interval, and its limits accordingly. Fixes: cb83b629bae03 ("sched/numa: Rewrite the CONFIG_NUMA sched domain sup= port") Signed-off-by: K Prateek Nayak Reviewed-by: Chen Yu Reviewed-by: Shrikanth Hegde Reviewed-by: Valentin Schneider --- Changelog rfc v2..v3: o New patch. --- kernel/sched/topology.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/kernel/sched/topology.c b/kernel/sched/topology.c index cf643a5ddedd..649674bb6c3c 100644 --- a/kernel/sched/topology.c +++ b/kernel/sched/topology.c @@ -1638,8 +1638,6 @@ sd_init(struct sched_domain_topology_level *tl, int sd_id, sd_weight, sd_flags =3D 0; struct cpumask *sd_span; =20 - sd_weight =3D cpumask_weight(tl->mask(tl, cpu)); - if (tl->sd_flags) sd_flags =3D (*tl->sd_flags)(); if (WARN_ONCE(sd_flags & ~TOPOLOGY_SD_FLAGS, @@ -1647,8 +1645,6 @@ sd_init(struct sched_domain_topology_level *tl, sd_flags &=3D TOPOLOGY_SD_FLAGS; =20 *sd =3D (struct sched_domain){ - .min_interval =3D sd_weight, - .max_interval =3D 2*sd_weight, .busy_factor =3D 16, .imbalance_pct =3D 117, =20 @@ -1668,7 +1664,6 @@ sd_init(struct sched_domain_topology_level *tl, , =20 .last_balance =3D jiffies, - .balance_interval =3D sd_weight, =20 /* 50% success rate */ .newidle_call =3D 512, @@ -1685,6 +1680,11 @@ sd_init(struct sched_domain_topology_level *tl, cpumask_and(sd_span, cpu_map, tl->mask(tl, cpu)); sd_id =3D cpumask_first(sd_span); =20 + sd_weight =3D cpumask_weight(sd_span); + sd->min_interval =3D sd_weight; + sd->max_interval =3D 2 * sd_weight; + sd->balance_interval =3D sd_weight; + sd->flags |=3D asym_cpu_capacity_classify(sd_span, cpu_map); =20 WARN_ONCE((sd->flags & (SD_SHARE_CPUCAPACITY | SD_ASYM_CPUCAPACITY)) =3D= =3D --=20 2.34.1