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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 14 Aug 2025 15:35:13.2043 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: e20a28e1-8ea9-475c-d4d7-08dddb48293c 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=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: BN3PEPF0000B074.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: MN0PR12MB5980 Content-Type: text/plain; charset="utf-8" This is to prevent unnecessary scanning of short lived tasks to reduce CPU burning. Signed-off-by: Raghavendra K T --- mm/kscand.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/mm/kscand.c b/mm/kscand.c index 39a7fcef7de8..880c3693866d 100644 --- a/mm/kscand.c +++ b/mm/kscand.c @@ -28,6 +28,7 @@ =20 static struct task_struct *kscand_thread __read_mostly; static DEFINE_MUTEX(kscand_mutex); +extern unsigned int sysctl_numa_balancing_scan_delay; =20 /* * Total VMA size to cover during scan. @@ -1010,6 +1011,7 @@ void __kscand_enter(struct mm_struct *mm) { struct kscand_mm_slot *kscand_slot; struct mm_slot *slot; + unsigned long now; int wakeup; =20 /* __kscand_exit() must not run from under us */ @@ -1020,10 +1022,12 @@ void __kscand_enter(struct mm_struct *mm) if (!kscand_slot) return; =20 + now =3D jiffies; kscand_slot->address =3D 0; kscand_slot->scan_period =3D kscand_mm_scan_period_ms; kscand_slot->scan_size =3D kscand_scan_size; - kscand_slot->next_scan =3D 0; + kscand_slot->next_scan =3D now + + 2 * msecs_to_jiffies(sysctl_numa_balancing_scan_delay); kscand_slot->scan_delta =3D 0; =20 slot =3D &kscand_slot->slot; --=20 2.34.1