Hello, On kernel 5.0.13, when trying to use (newly created) md raid1 arrays with multi-queue schedulers, a hang always happens (usually within a few hours) in the kernel. Initially I assumed that the patch https://patchwork.kernel.org/patch/10787903/ will fix all the mq/mdraid related freezes, but they still occur. I have experienced similar problems on the 4.19 kernels, but I was able to workaround them using scsi_mod.use_blk_mq=0. Since kernel 5.0 that is not possible anymore as the single-queue schedulers have been removed. Relevant parts of the kernel log: May 10 17:51:08 server kernel: INFO: task md0_raid1:435 blocked for more than 120 seconds. May 10 17:51:08 server kernel: Not tainted 5.0.13-arch1-1-ARCH #1 May 10 17:51:08 server kernel: "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. May 10 17:51:08 server kernel: md0_raid1 D 0 435 2 0x80000080 May 10 17:51:08 server kernel: Call Trace: May 10 17:51:08 server kernel: ? __schedule+0x30b/0x8b0 May 10 17:51:08 server kernel: ? preempt_count_add+0x79/0xb0 May 10 17:51:08 server kernel: schedule+0x32/0x80 May 10 17:51:08 server kernel: md_super_wait+0x69/0xa0 [md_mod] May 10 17:51:08 server kernel: ? wait_woken+0x80/0x80 May 10 17:51:08 server kernel: md_bitmap_wait_writes+0x8e/0xa0 [md_mod] May 10 17:51:08 server kernel: md_bitmap_unplug+0xf9/0x110 [md_mod] May 10 17:51:08 server kernel: flush_bio_list+0x1e/0xe0 [raid1] May 10 17:51:08 server kernel: flush_pending_writes+0x81/0xc0 [raid1] May 10 17:51:08 server kernel: raid1d+0xa3/0x12d0 [raid1] May 10 17:51:08 server kernel: ? preempt_count_add+0x79/0xb0 May 10 17:51:08 server kernel: ? _raw_spin_lock_irqsave+0x25/0x50 May 10 17:51:08 server kernel: ? lock_timer_base+0x67/0x80 May 10 17:51:08 server kernel: ? _raw_spin_unlock_irqrestore+0x20/0x40 May 10 17:51:08 server kernel: ? try_to_del_timer_sync+0x4d/0x80 May 10 17:51:08 server kernel: ? md_register_thread+0xd0/0xd0 [md_mod] May 10 17:51:08 server kernel: ? md_thread+0xf9/0x160 [md_mod] May 10 17:51:08 server kernel: ? abort_sync_write.isra.5+0x70/0x70 [raid1] May 10 17:51:08 server kernel: md_thread+0xf9/0x160 [md_mod] May 10 17:51:08 server kernel: ? wait_woken+0x80/0x80 May 10 17:51:08 server kernel: kthread+0x112/0x130 May 10 17:51:08 server kernel: ? kthread_park+0x80/0x80 May 10 17:51:08 server kernel: ret_from_fork+0x35/0x40 May 10 17:51:08 server kernel: INFO: task md0_resync:443 blocked for more than 120 seconds. May 10 17:51:08 server kernel: Not tainted 5.0.13-arch1-1-ARCH #1 May 10 17:51:08 server kernel: "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. May 10 17:51:08 server kernel: md0_resync D 0 443 2 0x80000080 May 10 17:51:09 server kernel: Call Trace: May 10 17:51:09 server kernel: ? __schedule+0x30b/0x8b0 May 10 17:51:09 server kernel: schedule+0x32/0x80 May 10 17:51:09 server kernel: raid1_sync_request+0x97f/0xb90 [raid1] May 10 17:51:09 server kernel: ? is_mddev_idle+0xbe/0x137 [md_mod] May 10 17:51:09 server kernel: ? wait_woken+0x80/0x80 May 10 17:51:09 server kernel: md_do_sync.cold.53+0x43c/0x98f [md_mod] May 10 17:51:09 server kernel: ? 0xffffffff9a000000 May 10 17:51:09 server kernel: ? __switch_to_asm+0x34/0x70 May 10 17:51:09 server kernel: ? wait_woken+0x80/0x80 May 10 17:51:09 server kernel: ? _raw_spin_unlock_irq+0x1d/0x30 May 10 17:51:09 server kernel: ? md_register_thread+0xd0/0xd0 [md_mod] May 10 17:51:09 server kernel: md_thread+0xf9/0x160 [md_mod] May 10 17:51:09 server kernel: ? preempt_count_add+0x79/0xb0 May 10 17:51:09 server kernel: ? _raw_spin_lock_irqsave+0x25/0x50 May 10 17:51:09 server kernel: ? _raw_spin_unlock_irqrestore+0x20/0x40 May 10 17:51:09 server kernel: kthread+0x112/0x130 May 10 17:51:09 server kernel: ? kthread_park+0x80/0x80 May 10 17:51:09 server kernel: ret_from_fork+0x35/0x40 May 10 17:51:09 server kernel: INFO: task jbd2/md0-8:498 blocked for more than 120 seconds. May 10 17:51:09 server kernel: Not tainted 5.0.13-arch1-1-ARCH #1 May 10 17:51:09 server kernel: "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. May 10 17:51:09 server kernel: jbd2/md0-8 D 0 498 2 0x80000080 May 10 17:51:09 server kernel: Call Trace: May 10 17:51:09 server kernel: ? __schedule+0x30b/0x8b0 May 10 17:51:09 server kernel: ? __wake_up_common_lock+0x89/0xc0 May 10 17:51:09 server kernel: ? wait_woken+0x80/0x80 May 10 17:51:09 server kernel: schedule+0x32/0x80 May 10 17:51:09 server kernel: jbd2_journal_commit_transaction+0x250/0x18c0 [jbd2] May 10 17:51:09 server kernel: ? __switch_to_asm+0x40/0x70 May 10 17:51:09 server kernel: ? __switch_to_asm+0x34/0x70 May 10 17:51:09 server kernel: ? __switch_to_asm+0x40/0x70 May 10 17:51:09 server kernel: ? __switch_to_asm+0x40/0x70 May 10 17:51:09 server kernel: ? __switch_to_asm+0x40/0x70 May 10 17:51:09 server kernel: ? __switch_to_asm+0x34/0x70 May 10 17:51:09 server kernel: ? __switch_to_asm+0x34/0x70 May 10 17:51:09 server kernel: ? __switch_to_asm+0x40/0x70 May 10 17:51:09 server kernel: ? __switch_to_asm+0x34/0x70 May 10 17:51:09 server kernel: ? __switch_to_asm+0x34/0x70 May 10 17:51:09 server kernel: ? wait_woken+0x80/0x80 May 10 17:51:09 server kernel: ? preempt_count_add+0x79/0xb0 May 10 17:51:09 server kernel: ? lock_timer_base+0x67/0x80 May 10 17:51:09 server kernel: ? _raw_spin_unlock_irqrestore+0x20/0x40 May 10 17:51:09 server kernel: kjournald2+0xc0/0x270 [jbd2] May 10 17:51:09 server kernel: ? __wake_up_common+0x77/0x140 May 10 17:51:09 server kernel: ? wait_woken+0x80/0x80 May 10 17:51:09 server kernel: ? commit_timeout+0x10/0x10 [jbd2] May 10 17:51:09 server kernel: kthread+0x112/0x130 May 10 17:51:09 server kernel: ? kthread_park+0x80/0x80 May 10 17:51:09 server kernel: ret_from_fork+0x35/0x40 May 10 17:51:09 server kernel: INFO: task ext4lazyinit:500 blocked for more than 120 seconds. May 10 17:51:09 server kernel: Not tainted 5.0.13-arch1-1-ARCH #1 May 10 17:51:09 server kernel: "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. May 10 17:51:09 server kernel: ext4lazyinit D 0 500 2 0x80000080 May 10 17:51:09 server kernel: Call Trace: May 10 17:51:09 server kernel: ? __schedule+0x30b/0x8b0 May 10 17:51:09 server kernel: ? __wake_up_common_lock+0x89/0xc0 May 10 17:51:09 server kernel: schedule+0x32/0x80 May 10 17:51:09 server kernel: schedule_timeout+0x311/0x4a0 May 10 17:51:09 server kernel: ? blk_flush_plug_list+0xb1/0xf0 May 10 17:51:09 server kernel: io_schedule_timeout+0x19/0x40 May 10 17:51:09 server kernel: wait_for_common_io.constprop.2+0x9f/0x130 May 10 17:51:09 server kernel: ? wake_up_q+0x70/0x70 May 10 17:51:09 server kernel: submit_bio_wait+0x5b/0x80 May 10 17:51:09 server kernel: blkdev_issue_zeroout+0x142/0x220 May 10 17:51:09 server kernel: ext4_init_inode_table+0x17d/0x390 [ext4] May 10 17:51:09 server kernel: ext4_lazyinit_thread+0x2ae/0x390 [ext4] May 10 17:51:09 server kernel: ? ext4_unregister_li_request.isra.13+0x60/0x60 [ext4] May 10 17:51:09 server kernel: kthread+0x112/0x130 May 10 17:51:09 server kernel: ? kthread_park+0x80/0x80 May 10 17:51:09 server kernel: ret_from_fork+0x35/0x40 May 10 17:51:09 server kernel: INFO: task rsync:1728 blocked for more than 120 seconds. May 10 17:51:09 server kernel: Not tainted 5.0.13-arch1-1-ARCH #1 May 10 17:51:09 server kernel: "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. May 10 17:51:09 server kernel: rsync D 0 1728 1727 0x00000080 May 10 17:51:09 server kernel: Call Trace: May 10 17:51:09 server kernel: ? __schedule+0x30b/0x8b0 May 10 17:51:09 server kernel: ? bit_wait+0x50/0x50 May 10 17:51:09 server kernel: schedule+0x32/0x80 May 10 17:51:09 server kernel: io_schedule+0x12/0x40 May 10 17:51:09 server kernel: bit_wait_io+0xd/0x50 May 10 17:51:09 server kernel: __wait_on_bit_lock+0x5d/0xa0 May 10 17:51:09 server kernel: out_of_line_wait_on_bit_lock+0x91/0xb0 May 10 17:51:09 server kernel: ? init_wait_var_entry+0x40/0x40 May 10 17:51:09 server kernel: do_get_write_access+0x1f6/0x530 [jbd2] May 10 17:51:09 server kernel: ? ext4_dirty_inode+0x46/0x60 [ext4] May 10 17:51:09 server kernel: jbd2_journal_get_write_access+0x2c/0x50 [jbd2] May 10 17:51:09 server kernel: __ext4_journal_get_write_access+0x2c/0x70 [ext4] May 10 17:51:09 server kernel: ext4_reserve_inode_write+0x96/0xc0 [ext4] May 10 17:51:09 server kernel: ext4_mark_inode_dirty+0x4e/0x1d0 [ext4] May 10 17:51:09 server kernel: ext4_dirty_inode+0x46/0x60 [ext4] May 10 17:51:09 server kernel: __mark_inode_dirty+0x41/0x3e0 May 10 17:51:09 server kernel: ext4_setattr+0x380/0xad0 [ext4] May 10 17:51:09 server kernel: notify_change+0x269/0x440 May 10 17:51:09 server kernel: utimes_common.isra.0+0xdf/0x1b0 May 10 17:51:09 server kernel: do_utimes+0xeb/0x160 May 10 17:51:09 server kernel: __se_sys_utimensat+0x76/0xc0 May 10 17:51:09 server kernel: do_syscall_64+0x5b/0x170 May 10 17:51:09 server kernel: entry_SYSCALL_64_after_hwframe+0x44/0xa9 May 10 17:51:09 server kernel: RIP: 0033:0x7f939757cb43 May 10 17:51:09 server kernel: Code: Bad RIP value. May 10 17:51:09 server kernel: RSP: 002b:00007ffff78cb998 EFLAGS: 00000206 ORIG_RAX: 0000000000000118 May 10 17:51:09 server kernel: RAX: ffffffffffffffda RBX: 00007ffff78cde50 RCX: 00007f939757cb43 May 10 17:51:09 server kernel: RDX: 00007ffff78cb9a0 RSI: 00007ffff78cde50 RDI: 00000000ffffff9c May 10 17:51:09 server kernel: RBP: 000000002f5265f0 R08: 0000000000000000 R09: 000055b37a77d7a0 May 10 17:51:09 server kernel: R10: 0000000000000100 R11: 0000000000000206 R12: 00000000000041c0 May 10 17:51:09 server kernel: R13: 00007ffff78cbd20 R14: 000055b37a6a9368 R15: 0000000000000000 May 10 17:51:09 server kernel: INFO: task rsync:1729 blocked for more than 120 seconds. May 10 17:51:09 server kernel: Not tainted 5.0.13-arch1-1-ARCH #1 May 10 17:51:09 server kernel: "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. May 10 17:51:09 server kernel: rsync D 0 1729 1728 0x00000080 May 10 17:51:09 server kernel: Call Trace: May 10 17:51:09 server kernel: ? __schedule+0x30b/0x8b0 May 10 17:51:09 server kernel: schedule+0x32/0x80 May 10 17:51:09 server kernel: wait_transaction_locked+0x87/0xc0 [jbd2] May 10 17:51:09 server kernel: ? wait_woken+0x80/0x80 May 10 17:51:09 server kernel: add_transaction_credits+0xd8/0x290 [jbd2] May 10 17:51:09 server kernel: ? ext4_dirty_inode+0x46/0x60 [ext4] May 10 17:51:09 server kernel: start_this_handle+0x104/0x450 [jbd2] May 10 17:51:09 server kernel: ? find_get_entry+0x116/0x180 May 10 17:51:09 server kernel: jbd2__journal_start+0xd9/0x200 [jbd2] May 10 17:51:09 server kernel: ext4_da_write_begin+0x199/0x480 [ext4] May 10 17:51:09 server kernel: generic_perform_write+0xb7/0x1c0 May 10 17:51:09 server kernel: ? file_update_time+0x5e/0x130 May 10 17:51:09 server kernel: __generic_file_write_iter+0xfa/0x1c0 May 10 17:51:09 server kernel: ? generic_write_checks+0x4c/0xb0 May 10 17:51:09 server kernel: ext4_file_write_iter+0xc6/0x3f0 [ext4] May 10 17:51:09 server kernel: __vfs_write+0x14d/0x1b0 May 10 17:51:09 server kernel: vfs_write+0xa9/0x1a0 May 10 17:51:09 server kernel: ksys_write+0x4f/0xb0 May 10 17:51:09 server kernel: do_syscall_64+0x5b/0x170 May 10 17:51:09 server kernel: entry_SYSCALL_64_after_hwframe+0x44/0xa9 May 10 17:51:09 server kernel: RIP: 0033:0x7f9397577cc8 May 10 17:51:09 server kernel: Code: Bad RIP value. May 10 17:51:09 server kernel: RSP: 002b:00007ffff78cac18 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 May 10 17:51:09 server kernel: RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f9397577cc8 May 10 17:51:09 server kernel: RDX: 0000000000000400 RSI: 000055b379198e50 RDI: 0000000000000001 May 10 17:51:09 server kernel: RBP: 0000000000000400 R08: 0000000000000400 R09: 00000000a2b05d8a May 10 17:51:09 server kernel: R10: 00000000f5111859 R11: 0000000000000246 R12: 000055b379198e50 May 10 17:51:09 server kernel: R13: 000055b379198e50 R14: 0000000000003400 R15: 0000000000000400 May 10 17:51:09 server kernel: INFO: task kworker/u8:1:21252 blocked for more than 120 seconds. May 10 17:51:09 server kernel: Not tainted 5.0.13-arch1-1-ARCH #1 May 10 17:51:09 server kernel: "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. May 10 17:51:09 server kernel: kworker/u8:1 D 0 21252 2 0x80000080 May 10 17:51:09 server kernel: Workqueue: writeback wb_workfn (flush-9:0) May 10 17:51:09 server kernel: Call Trace: May 10 17:51:09 server kernel: ? __schedule+0x30b/0x8b0 May 10 17:51:09 server kernel: ? bit_wait+0x50/0x50 May 10 17:51:09 server kernel: schedule+0x32/0x80 May 10 17:51:09 server kernel: io_schedule+0x12/0x40 May 10 17:51:09 server kernel: bit_wait_io+0xd/0x50 May 10 17:51:09 server kernel: __wait_on_bit_lock+0x5d/0xa0 May 10 17:51:09 server kernel: out_of_line_wait_on_bit_lock+0x91/0xb0 May 10 17:51:09 server kernel: ? init_wait_var_entry+0x40/0x40 May 10 17:51:09 server kernel: do_get_write_access+0x1f6/0x530 [jbd2] May 10 17:51:09 server kernel: jbd2_journal_get_write_access+0x2c/0x50 [jbd2] May 10 17:51:09 server kernel: __ext4_journal_get_write_access+0x2c/0x70 [ext4] May 10 17:51:09 server kernel: ? ext4_read_block_bitmap+0x14/0x50 [ext4] May 10 17:51:09 server kernel: ext4_mb_mark_diskspace_used+0x9c/0x490 [ext4] May 10 17:51:09 server kernel: ext4_mb_new_blocks+0x2a2/0xb70 [ext4] May 10 17:51:09 server kernel: ? __kmalloc+0x188/0x210 May 10 17:51:09 server kernel: ? ext4_find_extent+0x272/0x300 [ext4] May 10 17:51:09 server kernel: ? ext4_find_extent+0x272/0x300 [ext4] May 10 17:51:09 server kernel: ext4_ext_map_blocks+0xbd3/0x12b0 [ext4] May 10 17:51:09 server kernel: ? nr_free_zone_pages+0x80/0x90 May 10 17:51:09 server kernel: ext4_map_blocks+0xed/0x5c0 [ext4] May 10 17:51:09 server kernel: ext4_writepages+0xa20/0xf50 [ext4] May 10 17:51:09 server kernel: ? generic_writepages+0x61/0x90 May 10 17:51:09 server kernel: ? __switch_to_asm+0x35/0x70 May 10 17:51:09 server kernel: ? do_writepages+0x41/0xd0 May 10 17:51:09 server kernel: ? ext4_mark_inode_dirty+0x1d0/0x1d0 [ext4] May 10 17:51:09 server kernel: do_writepages+0x41/0xd0 May 10 17:51:09 server kernel: ? _raw_spin_unlock_irq+0x1d/0x30 May 10 17:51:09 server kernel: ? finish_task_switch+0x84/0x2d0 May 10 17:51:09 server kernel: ? __switch_to_asm+0x40/0x70 May 10 17:51:09 server kernel: ? preempt_count_add+0x79/0xb0 May 10 17:51:09 server kernel: __writeback_single_inode+0x3d/0x3c0 May 10 17:51:09 server kernel: ? _raw_spin_lock+0x13/0x30 May 10 17:51:09 server kernel: writeback_sb_inodes+0x1e8/0x4c0 May 10 17:51:09 server kernel: __writeback_inodes_wb+0x5d/0xb0 May 10 17:51:09 server kernel: wb_writeback+0x28f/0x340 May 10 17:51:09 server kernel: ? 0xffffffff9a000000 May 10 17:51:09 server kernel: ? cpumask_next+0x16/0x20 May 10 17:51:09 server kernel: wb_workfn+0x35d/0x430 May 10 17:51:09 server kernel: process_one_work+0x1eb/0x410 May 10 17:51:09 server kernel: worker_thread+0x2d/0x3d0 May 10 17:51:09 server kernel: ? process_one_work+0x410/0x410 May 10 17:51:09 server kernel: kthread+0x112/0x130 May 10 17:51:09 server kernel: ? kthread_park+0x80/0x80 May 10 17:51:09 server kernel: ret_from_fork+0x35/0x40 May 10 17:53:11 server kernel: INFO: task md0_raid1:435 blocked for more than 120 seconds. May 10 17:53:11 server kernel: Not tainted 5.0.13-arch1-1-ARCH #1 May 10 17:53:11 server kernel: "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. May 10 17:53:11 server kernel: md0_raid1 D 0 435 2 0x80000080 May 10 17:53:11 server kernel: Call Trace: May 10 17:53:11 server kernel: ? __schedule+0x30b/0x8b0 May 10 17:53:11 server kernel: ? preempt_count_add+0x79/0xb0 May 10 17:53:11 server kernel: schedule+0x32/0x80 May 10 17:53:11 server kernel: md_super_wait+0x69/0xa0 [md_mod] May 10 17:53:11 server kernel: ? wait_woken+0x80/0x80 May 10 17:53:11 server kernel: md_bitmap_wait_writes+0x8e/0xa0 [md_mod] May 10 17:53:11 server kernel: md_bitmap_unplug+0xf9/0x110 [md_mod] May 10 17:53:11 server kernel: flush_bio_list+0x1e/0xe0 [raid1] May 10 17:53:11 server kernel: flush_pending_writes+0x81/0xc0 [raid1] May 10 17:53:11 server kernel: raid1d+0xa3/0x12d0 [raid1] May 10 17:53:11 server kernel: ? preempt_count_add+0x79/0xb0 May 10 17:53:11 server kernel: ? _raw_spin_lock_irqsave+0x25/0x50 May 10 17:53:11 server kernel: ? lock_timer_base+0x67/0x80 May 10 17:53:11 server kernel: ? _raw_spin_unlock_irqrestore+0x20/0x40 May 10 17:53:11 server kernel: ? try_to_del_timer_sync+0x4d/0x80 May 10 17:53:11 server kernel: ? md_register_thread+0xd0/0xd0 [md_mod] May 10 17:53:11 server kernel: ? md_thread+0xf9/0x160 [md_mod] May 10 17:53:11 server kernel: ? abort_sync_write.isra.5+0x70/0x70 [raid1] May 10 17:53:11 server kernel: md_thread+0xf9/0x160 [md_mod] May 10 17:53:11 server kernel: ? wait_woken+0x80/0x80 May 10 17:53:11 server kernel: kthread+0x112/0x130 May 10 17:53:11 server kernel: ? kthread_park+0x80/0x80 May 10 17:53:11 server kernel: ret_from_fork+0x35/0x40 May 10 17:53:11 server kernel: INFO: task md0_resync:443 blocked for more than 120 seconds. May 10 17:53:11 server kernel: Not tainted 5.0.13-arch1-1-ARCH #1 May 10 17:53:11 server kernel: "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. May 10 17:53:11 server kernel: md0_resync D 0 443 2 0x80000080 May 10 17:53:11 server kernel: Call Trace: May 10 17:53:11 server kernel: ? __schedule+0x30b/0x8b0 May 10 17:53:11 server kernel: schedule+0x32/0x80 May 10 17:53:11 server kernel: raid1_sync_request+0x97f/0xb90 [raid1] May 10 17:53:11 server kernel: ? is_mddev_idle+0xbe/0x137 [md_mod] May 10 17:53:11 server kernel: ? wait_woken+0x80/0x80 May 10 17:53:11 server kernel: md_do_sync.cold.53+0x43c/0x98f [md_mod] May 10 17:53:11 server kernel: ? 0xffffffff9a000000 May 10 17:53:11 server kernel: ? __switch_to_asm+0x34/0x70 May 10 17:53:11 server kernel: ? wait_woken+0x80/0x80 May 10 17:53:11 server kernel: ? _raw_spin_unlock_irq+0x1d/0x30 May 10 17:53:11 server kernel: ? md_register_thread+0xd0/0xd0 [md_mod] May 10 17:53:11 server kernel: md_thread+0xf9/0x160 [md_mod] May 10 17:53:11 server kernel: ? preempt_count_add+0x79/0xb0 May 10 17:53:11 server kernel: ? _raw_spin_lock_irqsave+0x25/0x50 May 10 17:53:11 server kernel: ? _raw_spin_unlock_irqrestore+0x20/0x40 May 10 17:53:11 server kernel: kthread+0x112/0x130 May 10 17:53:11 server kernel: ? kthread_park+0x80/0x80 May 10 17:53:11 server kernel: ret_from_fork+0x35/0x40 May 10 17:53:11 server kernel: INFO: task jbd2/md0-8:498 blocked for more than 120 seconds. May 10 17:53:11 server kernel: Not tainted 5.0.13-arch1-1-ARCH #1 May 10 17:53:11 server kernel: "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. May 10 17:53:11 server kernel: jbd2/md0-8 D 0 498 2 0x80000080 May 10 17:53:11 server kernel: Call Trace: May 10 17:53:11 server kernel: ? __schedule+0x30b/0x8b0 May 10 17:53:11 server kernel: ? __wake_up_common_lock+0x89/0xc0 May 10 17:53:11 server kernel: ? wait_woken+0x80/0x80 May 10 17:53:11 server kernel: schedule+0x32/0x80 May 10 17:53:11 server kernel: jbd2_journal_commit_transaction+0x250/0x18c0 [jbd2] May 10 17:53:11 server kernel: ? __switch_to_asm+0x40/0x70 May 10 17:53:11 server kernel: ? __switch_to_asm+0x34/0x70 May 10 17:53:11 server kernel: ? __switch_to_asm+0x40/0x70 May 10 17:53:11 server kernel: ? __switch_to_asm+0x40/0x70 May 10 17:53:11 server kernel: ? __switch_to_asm+0x40/0x70 May 10 17:53:11 server kernel: ? __switch_to_asm+0x34/0x70 May 10 17:53:11 server kernel: ? __switch_to_asm+0x34/0x70 May 10 17:53:11 server kernel: ? __switch_to_asm+0x40/0x70 May 10 17:53:11 server kernel: ? __switch_to_asm+0x34/0x70 May 10 17:53:11 server kernel: ? __switch_to_asm+0x34/0x70 May 10 17:53:11 server kernel: ? wait_woken+0x80/0x80 May 10 17:53:11 server kernel: ? preempt_count_add+0x79/0xb0 May 10 17:53:11 server kernel: ? lock_timer_base+0x67/0x80 May 10 17:53:11 server kernel: ? _raw_spin_unlock_irqrestore+0x20/0x40 May 10 17:53:11 server kernel: kjournald2+0xc0/0x270 [jbd2] May 10 17:53:11 server kernel: ? __wake_up_common+0x77/0x140 May 10 17:53:11 server kernel: ? wait_woken+0x80/0x80 May 10 17:53:11 server kernel: ? commit_timeout+0x10/0x10 [jbd2] May 10 17:53:11 server kernel: kthread+0x112/0x130 May 10 17:53:11 server kernel: ? kthread_park+0x80/0x80 May 10 17:53:11 server kernel: ret_from_fork+0x35/0x40
