Hi All,
I was rsyncing some subvolumes last night and at some point it stalled.
Stacktrace is provided in case it is helpful to devs.
Label: 'Backup' uuid: 21e59d66-3e88-4fc9-806f-69bde58be6a3
Total devices 4 FS bytes used 3.19TiB
devid 1 size 2.73TiB used 2.71TiB path /dev/mapper/a-backup--a
devid 2 size 2.73TiB used 2.71TiB path /dev/mapper/b-backup--b
devid 3 size 931.51GiB used 500.00GiB path /dev/sdf1
devid 4 size 931.51GiB used 500.00GiB path /dev/sdi1
Data, RAID1: total=3.16TiB, used=3.16TiB
System, RAID1: total=32.00MiB, used=592.00KiB
Metadata, RAID1: total=34.03GiB, used=28.49GiB
GlobalReserve, single: total=512.00MiB, used=0.00B
Mount:
/dev/mapper/a-backup--a on /media/backup type btrfs
(rw,noatime,compress=zstd:6,nossd,noacl,space_cache=v2,subvolid=5,subvol=/)
May 22 07:36:16 home kernel: rcu: INFO: rcu_preempt self-detected stall on CPU
May 22 07:36:16 home kernel: rcu: \x092-....: (18000 ticks this GP)
idle=862/1/0x4000000000000002 softirq=15766895/15766895 fqs=4660
May 22 07:36:16 home kernel: rcu: \x09 (t=18001 jiffies g=59669593 q=4556)
May 22 07:36:16 home kernel: NMI backtrace for cpu 2
May 22 07:36:16 home kernel: CPU: 2 PID: 28207 Comm: kworker/u16:15 Tainted: G
O 5.1.3-gentoo #2
May 22 07:36:16 home kernel: Hardware name: Gigabyte Technology Co., Ltd. To be
filled by O.E.M./B75M-D3H, BIOS F15 10/23/2013
May 22 07:36:16 home kernel: Workqueue: btrfs-delalloc btrfs_delalloc_helper
May 22 07:36:16 home kernel: Call Trace:
May 22 07:36:16 home kernel: <IRQ>
May 22 07:36:16 home kernel: dump_stack+0x46/0x60
May 22 07:36:16 home kernel: nmi_cpu_backtrace.cold+0x14/0x53
May 22 07:36:16 home kernel: ? lapic_can_unplug_cpu.cold+0x39/0x39
May 22 07:36:16 home kernel: nmi_trigger_cpumask_backtrace+0x99/0xa3
May 22 07:36:16 home kernel: rcu_dump_cpu_stacks+0x7b/0xa9
May 22 07:36:16 home kernel: rcu_sched_clock_irq.cold+0x190/0x43b
May 22 07:36:16 home kernel: ? cpuacct_account_field+0x11/0x60
May 22 07:36:16 home kernel: update_process_times+0x24/0x60
May 22 07:36:16 home kernel: tick_sched_timer+0x36/0x70
May 22 07:36:16 home kernel: ? tick_sched_handle.isra.0+0x40/0x40
May 22 07:36:16 home kernel: __hrtimer_run_queues+0xe2/0x170
May 22 07:36:16 home kernel: hrtimer_interrupt+0x101/0x220
May 22 07:36:16 home kernel: smp_apic_timer_interrupt+0x56/0x90
May 22 07:36:16 home kernel: apic_timer_interrupt+0xf/0x20
May 22 07:36:16 home kernel: </IRQ>
May 22 07:36:16 home kernel: RIP: 0010:queued_spin_lock_slowpath+0x3b/0x1a0
May 22 07:36:16 home kernel: Code: ff 75 41 f0 0f ba 2f 08 0f 92 c0 0f b6 c0 c1
e0 08 89 c2 8b 07 30 e4 09 d0 a9 00 01 ff ff 75 1b 85 c0 74 0e 8b 07 84 c0 74
08 <f3> 90 8b 07 84 c0 75 f8 b8 01 00 00 00 66 89 07 c3 f6 c4 01 75 04
May 22 07:36:16 home kernel: RSP: 0018:ffffc90000613c28 EFLAGS: 00000202
ORIG_RAX: ffffffffffffff13
May 22 07:36:16 home kernel: RAX: 0000000000000110 RBX: 0000000000001000 RCX:
00000060c68b4000
May 22 07:36:16 home kernel: RDX: 0000000000000000 RSI: 0000000000000000 RDI:
ffff88801b636c40
May 22 07:36:16 home kernel: RBP: ffff88801b636c00 R08: 0000000000000001 R09:
0000000000001000
May 22 07:36:16 home kernel: R10: ffff888106554570 R11: 0000000000000001 R12:
0000000000000000
May 22 07:36:16 home kernel: R13: ffff8882c75c2400 R14: ffff88801b636c40 R15:
ffff8882c75c2400
May 22 07:36:16 home kernel: find_free_extent+0x75d/0xe60
May 22 07:36:16 home kernel: btrfs_reserve_extent+0x9a/0x180
May 22 07:36:16 home kernel: submit_compressed_extents+0xff/0x470
May 22 07:36:16 home kernel: normal_work_helper+0x140/0x1e0
May 22 07:36:16 home kernel: process_one_work+0x19c/0x310
May 22 07:36:16 home kernel: worker_thread+0x45/0x3c0
May 22 07:36:16 home kernel: kthread+0xf1/0x130
May 22 07:36:16 home kernel: ? process_one_work+0x310/0x310
May 22 07:36:16 home kernel: ? kthread_park+0x80/0x80
May 22 07:36:16 home kernel: ret_from_fork+0x1f/0x40
May 22 07:39:16 home kernel: rcu: INFO: rcu_preempt self-detected stall on CPU
May 22 07:39:16 home kernel: rcu: \x092-....: (72003 ticks this GP)
idle=862/1/0x4000000000000002 softirq=15766895/15766895 fqs=19438
May 22 07:39:16 home kernel: rcu: \x09 (t=72004 jiffies g=59669593 q=16770)
May 22 07:39:16 home kernel: NMI backtrace for cpu 2
May 22 07:39:16 home kernel: CPU: 2 PID: 28207 Comm: kworker/u16:15 Tainted: G
O 5.1.3-gentoo #2
May 22 07:39:16 home kernel: Hardware name: Gigabyte Technology Co., Ltd. To be
filled by O.E.M./B75M-D3H, BIOS F15 10/23/2013
May 22 07:39:16 home kernel: Workqueue: btrfs-delalloc btrfs_delalloc_helper
May 22 07:39:16 home kernel: Call Trace:
May 22 07:39:16 home kernel: <IRQ>
May 22 07:39:16 home kernel: dump_stack+0x46/0x60
May 22 07:39:16 home kernel: nmi_cpu_backtrace.cold+0x14/0x53
May 22 07:39:16 home kernel: ? lapic_can_unplug_cpu.cold+0x39/0x39
May 22 07:39:16 home kernel: nmi_trigger_cpumask_backtrace+0x99/0xa3
May 22 07:39:16 home kernel: rcu_dump_cpu_stacks+0x7b/0xa9
May 22 07:39:16 home kernel: rcu_sched_clock_irq.cold+0x190/0x43b
May 22 07:39:16 home kernel: ? cpuacct_account_field+0x11/0x60
May 22 07:39:16 home kernel: update_process_times+0x24/0x60
May 22 07:39:16 home kernel: tick_sched_timer+0x36/0x70
May 22 07:39:16 home kernel: ? tick_sched_handle.isra.0+0x40/0x40
May 22 07:39:16 home kernel: __hrtimer_run_queues+0xe2/0x170
May 22 07:39:16 home kernel: hrtimer_interrupt+0x101/0x220
May 22 07:39:16 home kernel: smp_apic_timer_interrupt+0x56/0x90
May 22 07:39:16 home kernel: apic_timer_interrupt+0xf/0x20
May 22 07:39:16 home kernel: </IRQ>
May 22 07:39:16 home kernel: RIP: 0010:queued_spin_lock_slowpath+0x3f/0x1a0
May 22 07:39:16 home kernel: Code: 0f ba 2f 08 0f 92 c0 0f b6 c0 c1 e0 08 89 c2
8b 07 30 e4 09 d0 a9 00 01 ff ff 75 1b 85 c0 74 0e 8b 07 84 c0 74 08 f3 90 8b
07 <84> c0 75 f8 b8 01 00 00 00 66 89 07 c3 f6 c4 01 75 04 c6 47 01 00
May 22 07:39:16 home kernel: RSP: 0018:ffffc90000613c28 EFLAGS: 00000202
ORIG_RAX: ffffffffffffff13
May 22 07:39:16 home kernel: RAX: 0000000000000110 RBX: 0000000000001000 RCX:
00000060c68b4000
May 22 07:39:16 home kernel: RDX: 0000000000000000 RSI: 0000000000000000 RDI:
ffff88801b636c40
May 22 07:39:16 home kernel: RBP: ffff88801b636c00 R08: 0000000000000001 R09:
0000000000001000
May 22 07:39:16 home kernel: R10: ffff888106554570 R11: 0000000000000001 R12:
0000000000000000
May 22 07:39:16 home kernel: R13: ffff8882c75c2400 R14: ffff88801b636c40 R15:
ffff8882c75c2400
May 22 07:39:16 home kernel: find_free_extent+0x75d/0xe60
May 22 07:39:16 home kernel: btrfs_reserve_extent+0x9a/0x180
May 22 07:39:16 home kernel: submit_compressed_extents+0xff/0x470
May 22 07:39:16 home kernel: normal_work_helper+0x140/0x1e0
May 22 07:39:16 home kernel: process_one_work+0x19c/0x310
May 22 07:39:16 home kernel: worker_thread+0x45/0x3c0
May 22 07:39:16 home kernel: kthread+0xf1/0x130
May 22 07:39:16 home kernel: ? process_one_work+0x310/0x310
May 22 07:39:16 home kernel: ? kthread_park+0x80/0x80
May 22 07:39:16 home kernel: ret_from_fork+0x1f/0x40
