Increase LOCKDEP_CIRCULAR_QUEUE_BITS to avoid this warning: ------------[ cut here ]------------ lockdep bfs error:-1 WARNING: CPU: 0 PID: 16 at kernel/locking/lockdep.c:2059 print_bfs_bug+0x29/0x50 kernel/locking/lockdep.c:2059 Modules linked in: CPU: 0 UID: 0 PID: 16 Comm: ktimers/0 Not tainted syzkaller #0 PREEMPT_{RT,(full)} Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 RIP: 0010:print_bfs_bug+0x29/0x50 kernel/locking/lockdep.c:2059 Code: 90 55 53 89 fb e8 c7 65 18 03 89 c5 e8 00 a6 ff ff 85 ed 74 19 83 fb ff 74 1c 90 48 c7 c7 99 e0 04 8d 89 de e8 18 fe e6 ff 90 <0f> 0b 90 90 5b 5d c3 cc cc cc cc cc 48 c7 c7 0f 88 16 8d e8 8f 0f RSP: 0018:ffffc90000157240 EFLAGS: 00010046 RAX: c140ca0d4a975e00 RBX: 00000000ffffffff RCX: ffff88801c295940 RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000100 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000100 R10: dffffc0000000000 R11: ffffed1017104863 R12: ffffffff95a63c38 R13: ffffffff95a63ca8 R14: ffff88801c2965f0 R15: 0000000000000034 FS: 0000000000000000(0000) GS:ffff8881268bc000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f678ae3f720 CR3: 000000002416e000 CR4: 00000000003526f0 Call Trace: check_irq_usage kernel/locking/lockdep.c:-1 [inline] check_prev_add kernel/locking/lockdep.c:3169 [inline] check_prevs_add kernel/locking/lockdep.c:3284 [inline] validate_chain+0x1a4b/0x2140 kernel/locking/lockdep.c:3908 __lock_acquire+0xab9/0xd20 kernel/locking/lockdep.c:5237 lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5868 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0xa7/0xf0 kernel/locking/spinlock.c:162 remove_entity_load_avg kernel/sched/fair.c:4791 [inline] migrate_task_rq_fair+0xab/0x610 kernel/sched/fair.c:8553 set_task_cpu+0x334/0x990 kernel/sched/core.c:3365 try_to_wake_up+0x5c9/0x12b0 kernel/sched/core.c:4325 __wake_up_common kernel/sched/wait.c:108 [inline] __wake_up_common_lock+0x133/0x1e0 kernel/sched/wait.c:125 aoenet_xmit+0x135/0x190 drivers/block/aoe/aoenet.c:123 aoecmd_cfg+0x76b/0x7c0 drivers/block/aoe/aoecmd.c:1375 call_timer_fn+0x17e/0x5f0 kernel/time/timer.c:1747 expire_timers kernel/time/timer.c:1798 [inline] __run_timers kernel/time/timer.c:2372 [inline] __run_timer_base+0x648/0x970 kernel/time/timer.c:2384 run_timer_base kernel/time/timer.c:2393 [inline] run_timer_softirq+0xb7/0x180 kernel/time/timer.c:2403 handle_softirqs+0x22f/0x710 kernel/softirq.c:579 __do_softirq kernel/softirq.c:613 [inline] run_ktimerd+0xcf/0x190 kernel/softirq.c:1043 smpboot_thread_fn+0x53f/0xa60 kernel/smpboot.c:160 kthread+0x70e/0x8a0 kernel/kthread.c:463 ret_from_fork+0x436/0x7d0 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245