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X-OriginatorOrg: arm.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 13 Jan 2026 10:47:05.8309 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 4380eb62-10c6-43c6-bd87-08de529117fb X-MS-Exchange-CrossTenant-Id: f34e5979-57d9-4aaa-ad4d-b122a662184d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=f34e5979-57d9-4aaa-ad4d-b122a662184d;Ip=[4.158.2.129];Helo=[outbound-uk1.az.dlp.m.darktrace.com] X-MS-Exchange-CrossTenant-AuthSource: DB5PEPF00014B8A.eurprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DU4PR08MB11811 Hello Prateek, On 1/13/26 05:12, K Prateek Nayak wrote: > Hello Pierre, > > On 1/13/2026 2:14 AM, Pierre Gondois wrote: >> Hello Peter, >> >> It seems this patch: >> 6455ad5346c9 ("sched: Move sched_class::prio_changed() into the change pattern") >> is triggering the following warning: >> rq_pin_lock() >> \-WARN_ON_ONCE(rq->balance_callback && rq->balance_callback != &balance_push_callback); > Can you check if the following solution helps your case too: > https://lore.kernel.org/all/20260106104113.GX3707891@noisy.programming.kicks-ass.net/ > I can still see the issue. It seems the task deadline is also updated in: sched_change_end() \-enqueue_task_dl()   \-enqueue_dl_entity()     \-setup_new_dl_entity()       \-replenish_dl_new_period() if the task's period finished. So in sched_change_end(), the task priority (i.e. p->dl.deadline) is updated. This results in having an old_deadline earlier than the new p->dl.deadline. Thus the rq->balance_callback: prio_changed_dl() { ... if (dl_time_before(old_deadline, p->dl.deadline))   deadline_queue_pull_task(rq); ... }