Did this issue start happening after an update/upgrade? Was there a prior kernel version where you were not having this particular problem?
Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.18 kernel[0]. If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'. If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'. Once testing of the upstream kernel is complete, please mark this bug as "Confirmed". Thanks in advance. [0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.18-rc5 ** Changed in: linux (Ubuntu) Importance: Undecided => Medium ** Changed in: linux (Ubuntu) Status: Confirmed => Incomplete -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1781578 Title: Call trace observed while disabling PD on Ubuntu 16.04.4 Status in linux package in Ubuntu: Incomplete Bug description: I am working on smartpqi linux driver for Microsemi. We have a storage controller managment application tool to manage storage behind our controller. One of the application option what we have is to disable physical device(PD). During disable PD opertaion, Disable PD command got timedout. Then I observed below mentioned call trace in dmesg log. Please note we are running IO stress test on the PD which is being disabled. Please let me know if there are any known issues specific to Ubuntu kernel with respect to this. If its a known issue specific to Ubuntu 16.04.4 distro, does this issue already addressed in latest Ubuntu OS distro ? Thanks in advance! Sincerely, Murthy Bhat Call trace: smartpqi 0000:92:00.0: removed 5:0:2:0 30000d1701cf2001 Direct-Access ATA ST1000NX0303 AIO+ qd=32 [ 1199.201495] Buffer I/O error on dev sdk, logical block 244190645, async page read [ 1343.006515] sdn: [ 1358.264503] INFO: task kworker/173:1:1620 blocked for more than 120 seconds. [ 1358.271550] Tainted: G OE 4.13.0-36-generic #40~16.04.1-Ubuntu [ 1358.278966] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1358.286806] kworker/173:1 D 0 1620 2 0x00000000 [ 1358.286832] Workqueue: events pqi_rescan_worker [smartpqi] [ 1358.286836] Call trace: [ 1358.286844] [<ffff000008086068>] __switch_to+0x90/0xa8 [ 1358.286855] [<ffff000008a761c4>] __schedule+0x35c/0x8b0 [ 1358.286858] [<ffff000008a7674c>] schedule+0x34/0x90 [ 1358.286865] [<ffff0000084ccaa8>] blk_mq_freeze_queue_wait+0x70/0xd8 [ 1358.286869] [<ffff0000084cd230>] blk_mq_freeze_queue+0x28/0x38 [ 1358.286873] [<ffff0000084cd498>] blk_freeze_queue+0x20/0x30 [ 1358.286878] [<ffff0000084bd830>] blk_cleanup_queue+0x78/0x128 [ 1358.286883] [<ffff000008764f3c>] __scsi_remove_device+0x64/0x128 [ 1358.286884] [<ffff000008765030>] scsi_remove_device+0x30/0x48 [ 1358.286887] [<ffff000008765228>] scsi_remove_target+0x188/0x1c8 [ 1358.286899] [<ffff000000bcbc08>] sas_rphy_remove+0x78/0x98 [scsi_transport_sas] [ 1358.286907] [<ffff000000bcdbd8>] sas_port_delete+0x38/0x160 [scsi_transport_sas] [ 1358.286918] [<ffff00000141a32c>] pqi_free_sas_port+0x4c/0x88 [smartpqi] [ 1358.286926] [<ffff00000141a6fc>] pqi_remove_sas_device+0x24/0x38 [smartpqi] [ 1358.286933] [<ffff000001413b80>] pqi_update_device_list+0x520/0x818 [smartpqi] [ 1358.286939] [<ffff000001415af8>] pqi_scan_scsi_devices+0x420/0x980 [smartpqi] [ 1358.286946] [<ffff0000014160b4>] pqi_rescan_worker+0x24/0x30 [smartpqi] [ 1358.286955] [<ffff0000080f3dfc>] process_one_work+0x14c/0x420 [ 1358.286957] [<ffff0000080f41fc>] worker_thread+0x12c/0x470 [ 1358.286961] [<ffff0000080fae80>] kthread+0x108/0x138 [ 1358.286963] [<ffff0000080838e0>] ret_from_fork+0x10/0x30 [ 1358.287045] INFO: task pain:6788 blocked for more than 120 seconds. [ 1358.293326] Tainted: G OE 4.13.0-36-generic #40~16.04.1-Ubuntu [ 1358.300730] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1358.308567] pain D 0 6788 6633 0x00000000 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1781578/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
