sched: DL replenish lagged too much BUG: workqueue lockup - pool cpus=1 node=0 flags=0x2 nice=0 stuck for 32s! Showing busy workqueues and worker pools: workqueue events: flags=0x0 pwq 2: cpus=0 node=0 flags=0x2 nice=0 active=10 refcnt=11 in-flight: 6659:nsim_fib_event_work nsim_fib_event_work pending: 3*nsim_dev_hwstats_traffic_work, vmstat_shepherd, 4*ovs_dp_masks_rebalance pwq 6: cpus=1 node=0 flags=0x2 nice=0 active=16 refcnt=17 in-flight: 24:nsim_fib_event_work nsim_fib_event_work ,26:nsim_fib_event_work ,6677:nsim_fib_event_work ,6670:nsim_fib_event_work nsim_fib_event_work pending: 2*nsim_dev_hwstats_traffic_work, psi_avgs_work, drm_fb_helper_damage_work, 2*psi_avgs_work, 2*ovs_dp_masks_rebalance, 2*nsim_fib_event_work workqueue events_long: flags=0x0 pwq 2: cpus=0 node=0 flags=0x2 nice=0 active=2 refcnt=3 pending: 2*defense_work_handler pwq 6: cpus=1 node=0 flags=0x2 nice=0 active=4 refcnt=5 pending: 4*defense_work_handler workqueue events_unbound: flags=0x2 pwq 8: cpus=0-1 flags=0x6 nice=0 active=7 refcnt=8 in-flight: 1786:cfg80211_wiphy_work cfg80211_wiphy_work pending: 2*nsim_dev_trap_report_work, flush_memcg_stats_dwork, nsim_dev_trap_report_work, crng_reseed pwq 8: cpus=0-1 flags=0x6 nice=0 active=11 refcnt=12 in-flight: 6827:cfg80211_wiphy_work cfg80211_wiphy_work ,12:cfg80211_wiphy_work cfg80211_wiphy_work ,42:cfg80211_wiphy_work cfg80211_wiphy_work ,14:fsnotify_connector_destroy_workfn pending: toggle_allocation_gate, 2*nsim_dev_trap_report_work, macvlan_process_broadcast workqueue events_power_efficient: flags=0x82 pwq 8: cpus=0-1 flags=0x6 nice=0 active=7 refcnt=8 in-flight: 682:gc_worker ,289:neigh_periodic_work pending: fb_flashcursor, do_cache_clean, wg_ratelimiter_gc_entries, 2*neigh_managed_work workqueue kvfree_rcu_reclaim: flags=0xa pwq 8: cpus=0-1 flags=0x6 nice=0 active=1 refcnt=2 pending: kfree_rcu_monitor workqueue mm_percpu_wq: flags=0x8 pwq 6: cpus=1 node=0 flags=0x2 nice=0 active=1 refcnt=2 pending: vmstat_update workqueue kblockd: flags=0x18 pwq 3: cpus=0 node=0 flags=0x0 nice=-20 active=1 refcnt=2 pending: blk_mq_timeout_work workqueue mld: flags=0x40008 pwq 2: cpus=0 node=0 flags=0x2 nice=0 active=1 refcnt=12 in-flight: 4199(RESCUER):mld_ifc_work inactive: mld_ifc_work, mld_dad_work, 4*mld_ifc_work, 2*mld_dad_work, mld_ifc_work pwq 6: cpus=1 node=0 flags=0x2 nice=0 active=1 refcnt=165 pending: mld_ifc_work inactive: mld_ifc_work, 7*mld_dad_work, 5*mld_ifc_work, mld_dad_work, 3*mld_ifc_work, mld_dad_work, mld_ifc_work, mld_dad_work, 2*mld_ifc_work, mld_dad_work, 4*mld_ifc_work, mld_dad_work, 3*mld_ifc_work, 3*mld_dad_work, 12*mld_ifc_work, mld_dad_work, mld_ifc_work, mld_dad_work, 6*mld_ifc_work, 2*mld_dad_work, 6*mld_ifc_work, mld_dad_work, 12*mld_ifc_work, mld_dad_work, 21*mld_ifc_work, 65*mld_dad_work workqueue ipv6_addrconf: flags=0x6000a pwq 8: cpus=0-1 flags=0x6 nice=0 active=1 refcnt=290 in-flight: 4200(RESCUER):addrconf_dad_work inactive: 285*addrconf_dad_work workqueue bat_events: flags=0x6000a pwq 8: cpus=0-1 flags=0x6 nice=0 active=1 refcnt=45 in-flight: 4275(RESCUER):batadv_tt_purge inactive: batadv_iv_send_outstanding_bat_ogm_packet, batadv_mcast_mla_update, 5*batadv_iv_send_outstanding_bat_ogm_packet, batadv_purge_orig, batadv_iv_send_outstanding_bat_ogm_packet, batadv_mcast_mla_update, 2*batadv_iv_send_outstanding_bat_ogm_packet, 2*batadv_mcast_mla_update, 2*batadv_purge_orig, 4*batadv_tt_purge, batadv_dat_purge, batadv_bla_periodic_work, batadv_dat_purge, batadv_bla_periodic_work, batadv_dat_purge, batadv_bla_periodic_work, batadv_dat_purge, batadv_bla_periodic_work, batadv_dat_purge, batadv_bla_periodic_work, 5*batadv_nc_worker, batadv_mcast_mla_update, 2*batadv_iv_send_outstanding_bat_ogm_packet, 2*batadv_purge_orig workqueue udp_tunnel_nic: flags=0x20002 pwq 8: cpus=0-1 flags=0x6 nice=0 active=1 refcnt=7 in-flight: 924:udp_tunnel_nic_device_sync_work inactive: 3*udp_tunnel_nic_device_sync_work workqueue ext4-rsv-conversion: flags=0xa pwq 8: cpus=0-1 flags=0x6 nice=0 active=1 refcnt=3 in-flight: 6134(RESCUER):ext4_end_io_rsv_work workqueue wg-kex-wg0: flags=0x24 pwq 2: cpus=0 node=0 flags=0x2 nice=0 active=1 refcnt=2 in-flight: 1784:wg_packet_handshake_receive_worker pwq 6: cpus=1 node=0 flags=0x2 nice=0 active=1 refcnt=2 pending: wg_packet_handshake_receive_worker workqueue wg-kex-wg0: flags=0x6 pwq 8: cpus=0-1 flags=0x6 nice=0 active=1 refcnt=2 pending: wg_packet_handshake_send_worker workqueue wg-crypt-wg0: flags=0x28 pwq 6: cpus=1 node=0 flags=0x2 nice=0 active=2 refcnt=3 pending: wg_packet_encrypt_worker, wg_packet_tx_worker workqueue wg-kex-wg1: flags=0x24 pwq 2: cpus=0 node=0 flags=0x2 nice=0 active=1 refcnt=2 pending: wg_packet_handshake_receive_worker pwq 6: cpus=1 node=0 flags=0x2 nice=0 active=1 refcnt=2 pending: wg_packet_handshake_receive_worker workqueue wg-kex-wg1: flags=0x6 pwq 8: cpus=0-1 flags=0x6 nice=0 active=1 refcnt=2 pending: wg_packet_handshake_send_worker workqueue wg-crypt-wg1: flags=0x28 pwq 2: cpus=0 node=0 flags=0x2 nice=0 active=1 refcnt=3 pending: wg_packet_encrypt_worker pwq 6: cpus=1 node=0 flags=0x2 nice=0 active=3 refcnt=4 pending: wg_packet_encrypt_worker, wg_packet_decrypt_worker, wg_packet_tx_worker workqueue wg-kex-wg2: flags=0x24 pwq 2: cpus=0 node=0 flags=0x2 nice=0 active=1 refcnt=2 pending: wg_packet_handshake_receive_worker workqueue wg-kex-wg2: flags=0x6 pwq 8: cpus=0-1 flags=0x6 nice=0 active=1 refcnt=2 pending: wg_packet_handshake_send_worker workqueue wg-crypt-wg2: flags=0x28 pwq 6: cpus=1 node=0 flags=0x2 nice=0 active=3 refcnt=4 pending: wg_packet_encrypt_worker, wg_packet_tx_worker, wg_packet_decrypt_worker workqueue wg-kex-wg0: flags=0x24 pwq 2: cpus=0 node=0 flags=0x2 nice=0 active=1 refcnt=2 pending: wg_packet_handshake_receive_worker workqueue wg-kex-wg0: flags=0x6 pwq 8: cpus=0-1 flags=0x6 nice=0 active=2 refcnt=3 in-flight: 41:wg_packet_handshake_send_worker pending: wg_packet_handshake_send_worker pwq 8: cpus=0-1 flags=0x6 nice=0 active=1 refcnt=2 pending: wg_packet_handshake_send_worker workqueue wg-crypt-wg0: flags=0x28 pwq 2: cpus=0 node=0 flags=0x2 nice=0 active=2 refcnt=5 MAYDAY in-flight: 6708(RESCUER):wg_packet_encrypt_worker pending: wg_packet_tx_worker pwq 6: cpus=1 node=0 flags=0x2 nice=0 active=2 refcnt=3 pending: wg_packet_encrypt_worker, wg_packet_tx_worker workqueue wg-kex-wg1: flags=0x24 pwq 2: cpus=0 node=0 flags=0x2 nice=0 active=1 refcnt=2 in-flight: 10:wg_packet_handshake_receive_worker pwq 6: cpus=1 node=0 flags=0x2 nice=0 active=1 refcnt=2 pending: wg_packet_handshake_receive_worker workqueue wg-kex-wg1: flags=0x6 pwq 8: cpus=0-1 flags=0x6 nice=0 active=1 refcnt=2 pending: wg_packet_handshake_send_worker workqueue wg-crypt-wg1: flags=0x28 pwq 6: cpus=1 node=0 flags=0x2 nice=0 active=3 refcnt=4 pending: wg_packet_encrypt_worker, wg_packet_tx_worker, wg_packet_decrypt_worker workqueue wg-kex-wg2: flags=0x24 pwq 2: cpus=0 node=0 flags=0x2 nice=0 active=1 refcnt=2 in-flight: 9:wg_packet_handshake_receive_worker pwq 6: cpus=1 node=0 flags=0x2 nice=0 active=1 refcnt=2 pending: wg_packet_handshake_receive_worker workqueue wg-crypt-wg2: flags=0x28 pwq 6: cpus=1 node=0 flags=0x2 nice=0 active=3 refcnt=4 pending: wg_packet_encrypt_worker, wg_packet_decrypt_worker, wg_packet_tx_worker pool 2: cpus=0 node=0 flags=0x2 nice=0 hung=0s workers=5 manager: 6727 pool 6: cpus=1 node=0 flags=0x2 nice=0 hung=32s workers=7 manager: 6523 idle: 6811 6812 pool 8: cpus=0-1 flags=0x6 nice=0 hung=0s workers=10 manager: 6828 Showing backtraces of running workers in stalled CPU-bound worker pools: pool 6: task:kworker/1:0 state:R running task stack:0 pid:24 tgid:24 ppid:2 task_flags:0x4208060 flags:0x00000010 Workqueue: events nsim_fib_event_work Call trace: __switch_to+0x418/0x87c arch/arm64/kernel/process.c:741 (T) context_switch kernel/sched/core.c:5357 [inline] __schedule+0x13b0/0x2864 kernel/sched/core.c:6961 __schedule_loop kernel/sched/core.c:7043 [inline] schedule+0xb4/0x230 kernel/sched/core.c:7058 schedule_timeout+0x128/0x270 kernel/time/sleep_timeout.c:99 schedule_timeout_uninterruptible+0x7c/0xc0 kernel/time/sleep_timeout.c:158 msleep+0x3c/0x68 kernel/time/sleep_timeout.c:318 nsim_fib4_rt_add drivers/net/netdevsim/fib.c:369 [inline] nsim_fib4_rt_insert drivers/net/netdevsim/fib.c:432 [inline] nsim_fib4_event drivers/net/netdevsim/fib.c:464 [inline] nsim_fib_event drivers/net/netdevsim/fib.c:884 [inline] nsim_fib_event_work+0x13a4/0x25b8 drivers/net/netdevsim/fib.c:1493 process_one_work+0x7e8/0x155c kernel/workqueue.c:3236 process_scheduled_works kernel/workqueue.c:3319 [inline] worker_thread+0x990/0xed8 kernel/workqueue.c:3400 kthread+0x5fc/0x75c kernel/kthread.c:463 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844 pool 6: task:kworker/1:1 state:R running task stack:0 pid:26 tgid:26 ppid:2 task_flags:0x4208060 flags:0x00000010 Workqueue: events nsim_fib_event_work Call trace: __switch_to+0x418/0x87c arch/arm64/kernel/process.c:741 (T) context_switch kernel/sched/core.c:5357 [inline] __schedule+0x13b0/0x2864 kernel/sched/core.c:6961 __schedule_loop kernel/sched/core.c:7043 [inline] schedule+0xb4/0x230 kernel/sched/core.c:7058 schedule_timeout+0x128/0x270 kernel/time/sleep_timeout.c:99 schedule_timeout_uninterruptible+0x7c/0xc0 kernel/time/sleep_timeout.c:158 msleep+0x3c/0x68 kernel/time/sleep_timeout.c:318 nsim_fib4_rt_add drivers/net/netdevsim/fib.c:369 [inline] nsim_fib4_rt_insert drivers/net/netdevsim/fib.c:432 [inline] nsim_fib4_event drivers/net/netdevsim/fib.c:464 [inline] nsim_fib_event drivers/net/netdevsim/fib.c:884 [inline] nsim_fib_event_work+0x13a4/0x25b8 drivers/net/netdevsim/fib.c:1493 process_one_work+0x7e8/0x155c kernel/workqueue.c:3236 process_scheduled_works kernel/workqueue.c:3319 [inline] worker_thread+0x990/0xed8 kernel/workqueue.c:3400 kthread+0x5fc/0x75c kernel/kthread.c:463 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844 pool 6: task:kworker/1:4 state:R running task stack:0 pid:6677 tgid:6677 ppid:2 task_flags:0x4208060 flags:0x00000010 Workqueue: events nsim_fib_event_work Call trace: __switch_to+0x418/0x87c arch/arm64/kernel/process.c:741 (T) context_switch kernel/sched/core.c:5357 [inline] __schedule+0x13b0/0x2864 kernel/sched/core.c:6961 __schedule_loop kernel/sched/core.c:7043 [inline] schedule+0xb4/0x230 kernel/sched/core.c:7058 schedule_timeout+0x128/0x270 kernel/time/sleep_timeout.c:99 schedule_timeout_uninterruptible+0x7c/0xc0 kernel/time/sleep_timeout.c:158 msleep+0x3c/0x68 kernel/time/sleep_timeout.c:318 nsim_fib4_rt_add drivers/net/netdevsim/fib.c:369 [inline] nsim_fib4_rt_insert drivers/net/netdevsim/fib.c:432 [inline] nsim_fib4_event drivers/net/netdevsim/fib.c:464 [inline] nsim_fib_event drivers/net/netdevsim/fib.c:884 [inline] nsim_fib_event_work+0x13a4/0x25b8 drivers/net/netdevsim/fib.c:1493 process_one_work+0x7e8/0x155c kernel/workqueue.c:3236 process_scheduled_works kernel/workqueue.c:3319 [inline] worker_thread+0x990/0xed8 kernel/workqueue.c:3400 kthread+0x5fc/0x75c kernel/kthread.c:463 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844 pool 6: task:kworker/1:3 state:R running task stack:0 pid:6670 tgid:6670 ppid:2 task_flags:0x4208060 flags:0x00000010 Workqueue: events nsim_fib_event_work Call trace: __switch_to+0x418/0x87c arch/arm64/kernel/process.c:741 (T) context_switch kernel/sched/core.c:5357 [inline] __schedule+0x13b0/0x2864 kernel/sched/core.c:6961 preempt_schedule_irq+0x80/0x188 kernel/sched/core.c:7288 raw_irqentry_exit_cond_resched+0x30/0x44 kernel/entry/common.c:168 irqentry_exit+0xd4/0x108 kernel/entry/common.c:211 __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:68 [inline] exit_to_kernel_mode+0x10/0x1c arch/arm64/kernel/entry-common.c:75 __el1_irq arch/arm64/kernel/entry-common.c:522 [inline] el1_interrupt+0x4c/0x60 arch/arm64/kernel/entry-common.c:532 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:537 el1h_64_irq+0x6c/0x70 arch/arm64/kernel/entry.S:592 reset_page_owner include/linux/page_owner.h:-1 [inline] (P) free_pages_prepare mm/page_alloc.c:1395 [inline] (P) __free_frozen_pages+0xb88/0xcac mm/page_alloc.c:2895 (P) free_frozen_pages+0x14/0x20 mm/page_alloc.c:2933 __free_slab+0x104/0x1c8 mm/slub.c:2729 free_slab+0x24/0x120 mm/slub.c:2752 discard_slab mm/slub.c:2758 [inline] __put_partials+0x194/0x228 mm/slub.c:3223 put_cpu_partial+0x164/0x1c0 mm/slub.c:3298 __slab_free+0x1a0/0x25c mm/slub.c:4565 do_slab_free mm/slub.c:4647 [inline] ___cache_free+0x150/0x170 mm/slub.c:4753 qlink_free+0x48/0x94 mm/kasan/quarantine.c:163 qlist_free_all+0x44/0xb8 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x118/0x124 mm/kasan/quarantine.c:286 __kasan_kmalloc+0x2c/0xb4 mm/kasan/common.c:396 kasan_kmalloc include/linux/kasan.h:260 [inline] __kmalloc_cache_noprof+0x2a4/0x3fc mm/slub.c:4407 kmalloc_noprof include/linux/slab.h:905 [inline] kzalloc_noprof include/linux/slab.h:1039 [inline] nsim_fib6_rt_nh_add+0x64/0x218 drivers/net/netdevsim/fib.c:500 nsim_fib6_rt_create drivers/net/netdevsim/fib.c:562 [inline] nsim_fib6_rt_insert drivers/net/netdevsim/fib.c:752 [inline] nsim_fib6_event drivers/net/netdevsim/fib.c:856 [inline] nsim_fib_event drivers/net/netdevsim/fib.c:889 [inline] nsim_fib_event_work+0x14e8/0x25b8 drivers/net/netdevsim/fib.c:1493 process_one_work+0x7e8/0x155c kernel/workqueue.c:3236 process_scheduled_works kernel/workqueue.c:3319 [inline] worker_thread+0x990/0xed8 kernel/workqueue.c:3400 kthread+0x5fc/0x75c kernel/kthread.c:463 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844