[Kernel-packages] [Bug 1825413] Re: mdadm, mkfs, other io commands hang, stuck task, bad rip
I had this problem occur recently and was able to work with one of my System Administrators to narrow it down. I saw the floppy text in the output so I asked my Sys Admin to connect the Floppy Drive in VCenter to the VMs that were having this issue (3 new 18.04 installs) and the issue is now resolved on all of them. blkid, mdadm, nor fdisk hang anymore; they all work as they should. Not sure where the issue exactly lies, but connecting a floppy helped resolve it for now. I have a lot of other 16.04 servers that do not have this issue, for what it's worth. -- 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/1825413 Title: mdadm, mkfs, other io commands hang, stuck task, bad rip Status in linux package in Ubuntu: Confirmed Bug description: 1. disco 2. # apt-cache policy linux-image-virtual linux-image-virtual: Installed: 5.0.0.13.14 Candidate: 5.0.0.13.14 Version table: *** 5.0.0.13.14 500 500 http://archive.ubuntu.com/ubuntu disco/main amd64 Packages 100 /var/lib/dpkg/status 3. installation completes sucessfully 4. Running an installation of Disco creating filesystems and probing things will hang (stuck task) every so often. When it happens, the kernel throws an oops and bad rip value. [ 967.810391] INFO: task mdadm:12213 blocked for more than 120 seconds. [ 967.811787] Tainted: P O 5.0.0-13-generic #14-Ubuntu [ 967.813330] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 967.815500] mdadm D0 12213 12207 0x [ 967.815503] Call Trace: [ 967.815509] __schedule+0x2d0/0x840 [ 967.815511] ? __switch_to_asm+0x40/0x70 [ 967.815512] ? __switch_to_asm+0x34/0x70 [ 967.815514] schedule+0x2c/0x70 [ 967.815516] schedule_preempt_disabled+0xe/0x10 [ 967.815518] __mutex_lock.isra.10+0x2e4/0x4c0 [ 967.815522] ? exact_lock+0x11/0x20 [ 967.815524] __mutex_lock_slowpath+0x13/0x20 [ 967.815528] mutex_lock+0x2c/0x30 [ 967.815530] __blkdev_get+0x7b/0x550 [ 967.815532] ? bd_acquire+0xd0/0xd0 [ 967.815533] blkdev_get+0x10c/0x330 [ 967.815535] ? bd_acquire+0xd0/0xd0 [ 967.815537] blkdev_open+0x92/0x100 [ 967.815539] do_dentry_open+0x143/0x3a0 [ 967.815540] vfs_open+0x2d/0x30 [ 967.815542] path_openat+0x2d4/0x16d0 [ 967.815547] ? put_device+0x17/0x20 [ 967.815552] ? scsi_device_put+0x2b/0x30 [ 967.815553] do_filp_open+0x93/0x100 [ 967.81] ? strncpy_from_user+0x56/0x1b0 [ 967.815558] ? __alloc_fd+0x46/0x140 [ 967.815560] do_sys_open+0x177/0x280 [ 967.815561] ? _cond_resched+0x19/0x30 [ 967.815563] __x64_sys_openat+0x20/0x30 [ 967.815566] do_syscall_64+0x5a/0x110 [ 967.815567] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 967.815568] RIP: 0033:0x7faa36406cce [ 967.815572] Code: Bad RIP value. [ 967.815573] RSP: 002b:7ffedb663f80 EFLAGS: 0246 ORIG_RAX: 0101 [ 967.815574] RAX: ffda RBX: 4000 RCX: 7faa36406cce [ 967.815575] RDX: 4000 RSI: 564df70257b0 RDI: ff9c [ 967.815576] RBP: 564df70257b0 R08: 564df70257b0 R09: [ 967.815576] R10: R11: 0246 R12: 7ffedb664240 [ 967.815577] R13: R14: 0001 R15: 564df7023e00 [ 967.799227] INFO: task mkfs.btrfs:3767 blocked for more than 120 seconds. [ 967.803509] Tainted: P O 5.0.0-13-generic #14-Ubuntu [ 967.807192] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 967.810235] mkfs.btrfs D0 3767 1866 0x [ 967.810239] Call Trace: [ 967.810251] __schedule+0x2d0/0x840 [ 967.810254] ? __switch_to_asm+0x34/0x70 [ 967.810256] ? __switch_to_asm+0x40/0x70 [ 967.810258] schedule+0x2c/0x70 [ 967.810260] schedule_timeout+0x258/0x360 [ 967.810277] wait_for_completion+0xb7/0x140 [ 967.810281] ? wake_up_q+0x80/0x80 [ 967.810293] __floppy_read_block_0+0x138/0x190 [floppy] [ 967.810298] ? floppy_cmos_show+0x30/0x30 [floppy] [ 967.810302] floppy_revalidate+0xf8/0x230 [floppy] [ 967.810307] check_disk_change+0x62/0x70 [ 967.810309] floppy_open+0x2ae/0x380 [floppy] [ 967.810311] __blkdev_get+0xe5/0x550 [ 967.810313] ? bd_acquire+0xd0/0xd0 [ 967.810315] blkdev_get+0x10c/0x330 [ 967.810316] ? bd_acquire+0xd0/0xd0 [ 967.810318] blkdev_open+0x92/0x100 [ 967.810321] do_dentry_open+0x143/0x3a0 [ 967.810323] vfs_open+0x2d/0x30 [ 967.810326] path_openat+0x2d4/0x16d0 [ 967.810328] ? filename_lookup.part.60+0xe0/0x170 [ 967.810332] ? strncpy_from_user+0x56/0x1b0 [ 967.810333] do_filp_open+0x93/0x100 [ 967.810353] ? strncpy_from_user+0x56/0x1b0 [ 967.810358] ? __alloc_fd+0x46/0x140 [ 967.810360]
[Kernel-packages] [Bug 1825413] Re: mdadm, mkfs, other io commands hang, stuck task, bad rip
Same on physical HW (Medion with QuadCore) This seems to happen during mdadm run, every time a new initrd is being built. lsblk doesn't hag. blkid hangs. mdadm hangs. In this ps output, mdadm has been hung for almos two hours. jpc@quad:~$ ps -ft pts/4 ; date UIDPID PPID C STIME TTY TIME CMD root 7969 28631 0 20:29 pts/400:00:00 /bin/sh /var/lib/dpkg/info/linux-image-5.3.0-19-generic.postinst triggered l root 7970 7969 0 20:29 pts/400:00:00 sh /usr/lib/linux/triggers/5.3.0-19-generic root 7971 7970 0 20:29 pts/400:00:00 run-parts --report --exit-on-error --arg=5.3.0-19-generic --arg=/boot/vmlinu root 8047 7971 0 20:30 pts/400:00:00 /bin/sh -e /etc/kernel/postinst.d/initramfs-tools 5.3.0-19-generic /boot/vml root 8049 8047 0 20:30 pts/400:00:00 /bin/sh /usr/sbin/update-initramfs -c -k 5.3.0-19-generic -b /boot root 8051 8049 0 20:30 pts/400:00:00 /bin/sh /usr/sbin/mkinitramfs -o /boot/initrd.img-5.3.0-19-generic.new 5.3.0 root 18519 8051 0 20:30 pts/400:00:00 /bin/sh /usr/share/initramfs-tools/hooks/mdadm root 18642 18519 0 20:30 pts/400:00:00 /bin/sh /usr/share/mdadm/mkconf root 18648 18642 0 20:30 pts/400:00:00 /sbin/mdadm --examine --scan --config=partitions root 28631 17100 0 20:29 pts/400:00:00 /usr/bin/dpkg --force-overwrite --status-fd 112 --configure --pending [1499890.437313] INFO: task mdadm:18648 blocked for more than 120 seconds. [1499890.437318] Not tainted 5.0.0-31-generic #33-Ubuntu [1499890.437320] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [1499890.437322] mdadm D0 18648 18642 0x0080 [1499890.437325] Call Trace: [1499890.437335] __schedule+0x2d0/0x840 [1499890.437338] ? __switch_to_asm+0x41/0x70 [1499890.437340] ? __switch_to_asm+0x35/0x70 [1499890.437342] schedule+0x2c/0x70 [1499890.437344] schedule_timeout+0x258/0x360 [1499890.437346] wait_for_completion+0xb7/0x140 [1499890.437350] ? wake_up_q+0x80/0x80 [1499890.437358] __floppy_read_block_0+0x138/0x190 [floppy] [1499890.437362] ? floppy_cmos_show+0x30/0x30 [floppy] [1499890.437367] floppy_revalidate+0xf8/0x230 [floppy] [1499890.437370] check_disk_change+0x62/0x70 [1499890.437374] floppy_open+0x2ae/0x380 [floppy] [1499890.437376] __blkdev_get+0xe5/0x550 [1499890.437378] ? bd_acquire+0xd0/0xd0 [1499890.437380] blkdev_get+0x10c/0x330 [1499890.437382] ? bd_acquire+0xd0/0xd0 [1499890.437384] blkdev_open+0x92/0x100 [1499890.437386] do_dentry_open+0x143/0x3a0 [1499890.437389] vfs_open+0x2d/0x30 [1499890.437391] path_openat+0x2bf/0x1570 [1499890.437394] ? put_device+0x17/0x20 [1499890.437397] ? scsi_device_put+0x2b/0x30 [1499890.437400] do_filp_open+0x93/0x100 [1499890.437403] ? strncpy_from_user+0x57/0x1c0 [1499890.437405] ? __alloc_fd+0x46/0x150 [1499890.437407] do_sys_open+0x177/0x280 [1499890.437409] ? _cond_resched+0x19/0x30 [1499890.437412] __x64_sys_openat+0x20/0x30 [1499890.437415] do_syscall_64+0x5a/0x110 [1499890.437417] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [1499890.437419] RIP: 0033:0x7f84b3cc8fdb [1499890.437426] Code: Bad RIP value. [1499890.437427] RSP: 002b:7ffd8cb8fed0 EFLAGS: 0246 ORIG_RAX: 0101 [1499890.437429] RAX: ffda RBX: 4000 RCX: 7f84b3cc8fdb [1499890.437431] RDX: 4000 RSI: 5563a1618b80 RDI: ff9c [1499890.437432] RBP: 5563a1618b80 R08: 1999 R09: [1499890.437433] R10: R11: 0246 R12: 4000 [1499890.437434] R13: R14: 0001 R15: 5563a1612a00 -- 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/1825413 Title: mdadm, mkfs, other io commands hang, stuck task, bad rip Status in linux package in Ubuntu: Confirmed Bug description: 1. disco 2. # apt-cache policy linux-image-virtual linux-image-virtual: Installed: 5.0.0.13.14 Candidate: 5.0.0.13.14 Version table: *** 5.0.0.13.14 500 500 http://archive.ubuntu.com/ubuntu disco/main amd64 Packages 100 /var/lib/dpkg/status 3. installation completes sucessfully 4. Running an installation of Disco creating filesystems and probing things will hang (stuck task) every so often. When it happens, the kernel throws an oops and bad rip value. [ 967.810391] INFO: task mdadm:12213 blocked for more than 120 seconds. [ 967.811787] Tainted: P O 5.0.0-13-generic #14-Ubuntu [ 967.813330] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 967.815500] mdadm D0 12213 12207 0x [ 967.815503] Call Trace: [ 967.815509] __schedule+0x2d0/0x840 [ 967.815511] ? __switch_to_asm+0x40/0x70 [ 967.815512] ? __switch_to_asm+0x34/0x70 [ 967.815514]
[Kernel-packages] [Bug 1825413] Re: mdadm, mkfs, other io commands hang, stuck task, bad rip
I see the same thing related to slowness in a old-style parallel port device passed to a VM. Shortly after there's traffic related to the parallel port the task will hang forever, eventually locking up the VM entirely. This has happened on two SuperMicro servers, the problem did not exist in Xenial and began with the upgrade to bionic and remains in eoan. Oct 9 03:43:40 noc2 kernel: [48455.643616] INFO: task CPU 0/KVM:18338 blocked for more than 845 seconds. Oct 9 03:43:40 noc2 kernel: [48455.643624] Tainted: P O 5.3.0-13-generic #14-Ubuntu Oct 9 03:43:40 noc2 kernel: [48455.643625] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Oct 9 03:43:40 noc2 kernel: [48455.643627] CPU 0/KVM D0 18338 1 0x0100 Oct 9 03:43:40 noc2 kernel: [48455.643630] Call Trace: Oct 9 03:43:40 noc2 kernel: [48455.643643] __schedule+0x2b9/0x6c0 Oct 9 03:43:40 noc2 kernel: [48455.643655] ? handle_io+0x4c/0xc0 [kvm_intel] Oct 9 03:43:40 noc2 kernel: [48455.643659] schedule+0x42/0xb0 Oct 9 03:43:40 noc2 kernel: [48455.643661] schedule_preempt_disabled+0xe/0x10 Oct 9 03:43:40 noc2 kernel: [48455.643663] __mutex_lock.isra.0+0x182/0x4f0 Oct 9 03:43:40 noc2 kernel: [48455.643712] ? kvm_arch_vcpu_put+0xe4/0xf0 [kvm] Oct 9 03:43:40 noc2 kernel: [48455.643731] ? kvm_arch_vcpu_ioctl_run+0x37a/0x590 [kvm] Oct 9 03:43:40 noc2 kernel: [48455.643733] __mutex_lock_slowpath+0x13/0x20 Oct 9 03:43:40 noc2 kernel: [48455.643735] mutex_lock+0x2e/0x40 Oct 9 03:43:40 noc2 kernel: [48455.643738] pp_ioctl+0x25/0x50 [ppdev] Oct 9 03:43:40 noc2 kernel: [48455.643741] do_vfs_ioctl+0x407/0x670 Oct 9 03:43:40 noc2 kernel: [48455.643745] ? __secure_computing+0x42/0xe0 Oct 9 03:43:40 noc2 kernel: [48455.643747] ksys_ioctl+0x67/0x90 Oct 9 03:43:40 noc2 kernel: [48455.643748] __x64_sys_ioctl+0x1a/0x20 Oct 9 03:43:40 noc2 kernel: [48455.643752] do_syscall_64+0x5a/0x130 Oct 9 03:43:40 noc2 kernel: [48455.643754] entry_SYSCALL_64_after_hwframe+0x44/0xa9 Oct 9 03:43:40 noc2 kernel: [48455.643756] RIP: 0033:0x7fb9e75b167b Oct 9 03:43:40 noc2 kernel: [48455.643764] Code: Bad RIP value. Oct 9 03:43:40 noc2 kernel: [48455.643765] RSP: 002b:7fb9e4d743a8 EFLAGS: 0246 ORIG_RAX: 0010 Oct 9 03:43:40 noc2 kernel: [48455.643767] RAX: ffda RBX: 0004 RCX: 7fb9e75b167b Oct 9 03:43:40 noc2 kernel: [48455.643768] RDX: 7fb9e4d743b7 RSI: 40017086 RDI: 000a Oct 9 03:43:40 noc2 kernel: [48455.643769] RBP: 000a R08: 55a2756817e8 R09: 55a275289de0 Oct 9 03:43:40 noc2 kernel: [48455.643770] R10: 0001 R11: 0246 R12: 7fb9e4d743ef Oct 9 03:43:40 noc2 kernel: [48455.643771] R13: R14: 0001 R15: 55a276e69010 -- 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/1825413 Title: mdadm, mkfs, other io commands hang, stuck task, bad rip Status in linux package in Ubuntu: Confirmed Bug description: 1. disco 2. # apt-cache policy linux-image-virtual linux-image-virtual: Installed: 5.0.0.13.14 Candidate: 5.0.0.13.14 Version table: *** 5.0.0.13.14 500 500 http://archive.ubuntu.com/ubuntu disco/main amd64 Packages 100 /var/lib/dpkg/status 3. installation completes sucessfully 4. Running an installation of Disco creating filesystems and probing things will hang (stuck task) every so often. When it happens, the kernel throws an oops and bad rip value. [ 967.810391] INFO: task mdadm:12213 blocked for more than 120 seconds. [ 967.811787] Tainted: P O 5.0.0-13-generic #14-Ubuntu [ 967.813330] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 967.815500] mdadm D0 12213 12207 0x [ 967.815503] Call Trace: [ 967.815509] __schedule+0x2d0/0x840 [ 967.815511] ? __switch_to_asm+0x40/0x70 [ 967.815512] ? __switch_to_asm+0x34/0x70 [ 967.815514] schedule+0x2c/0x70 [ 967.815516] schedule_preempt_disabled+0xe/0x10 [ 967.815518] __mutex_lock.isra.10+0x2e4/0x4c0 [ 967.815522] ? exact_lock+0x11/0x20 [ 967.815524] __mutex_lock_slowpath+0x13/0x20 [ 967.815528] mutex_lock+0x2c/0x30 [ 967.815530] __blkdev_get+0x7b/0x550 [ 967.815532] ? bd_acquire+0xd0/0xd0 [ 967.815533] blkdev_get+0x10c/0x330 [ 967.815535] ? bd_acquire+0xd0/0xd0 [ 967.815537] blkdev_open+0x92/0x100 [ 967.815539] do_dentry_open+0x143/0x3a0 [ 967.815540] vfs_open+0x2d/0x30 [ 967.815542] path_openat+0x2d4/0x16d0 [ 967.815547] ? put_device+0x17/0x20 [ 967.815552] ? scsi_device_put+0x2b/0x30 [ 967.815553] do_filp_open+0x93/0x100 [ 967.81] ? strncpy_from_user+0x56/0x1b0 [ 967.815558] ? __alloc_fd+0x46/0x140 [ 967.815560] do_sys_open+0x177/0x280 [
[Kernel-packages] [Bug 1825413] Re: mdadm, mkfs, other io commands hang, stuck task, bad rip
Same thing happen in HyperV, when run apt-get install -yq linux- azure/disco, it hung in some rate. Like upgrade 3 VMs, 1 VM hung. VM configuration - 3584 memory, 2 Virtual processors [ 485.023123] INFO: task mdadm:11824 blocked for more than 120 seconds. [ 485.029485] Not tainted 5.0.0-15-generic #16-Ubuntu [ 485.034818] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 485.042754] mdadm D0 11824 11818 0x [ 485.042758] Call Trace: [ 485.042768] __schedule+0x2d0/0x840 [ 485.042770] ? __switch_to_asm+0x34/0x70 [ 485.042771] ? __switch_to_asm+0x40/0x70 [ 485.042774] schedule+0x2c/0x70 [ 485.042776] schedule_timeout+0x258/0x360 [ 485.042780] wait_for_completion+0xb7/0x140 [ 485.042784] ? wake_up_q+0x80/0x80 [ 485.042790] __floppy_read_block_0+0x138/0x190 [floppy] [ 485.042793] ? floppy_cmos_show+0x30/0x30 [floppy] [ 485.042797] floppy_revalidate+0xf8/0x230 [floppy] [ 485.042800] check_disk_change+0x62/0x70 [ 485.042803] floppy_open+0x2ae/0x380 [floppy] [ 485.042805] __blkdev_get+0xe5/0x550 [ 485.042807] ? bd_acquire+0xd0/0xd0 [ 485.042809] blkdev_get+0x10c/0x330 [ 485.042811] ? bd_acquire+0xd0/0xd0 [ 485.042812] blkdev_open+0x92/0x100 [ 485.042815] do_dentry_open+0x143/0x3a0 [ 485.042818] vfs_open+0x2d/0x30 [ 485.042820] path_openat+0x2d4/0x16d0 [ 485.042825] ? put_device+0x17/0x20 [ 485.042828] ? scsi_device_put+0x2b/0x30 [ 485.042831] do_filp_open+0x93/0x100 [ 485.042835] ? strncpy_from_user+0x56/0x1b0 [ 485.042839] ? __alloc_fd+0xb2/0x140 [ 485.042841] do_sys_open+0x177/0x280 [ 485.042844] __x64_sys_openat+0x20/0x30 [ 485.042847] do_syscall_64+0x5a/0x110 [ 485.042849] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 485.042851] RIP: 0033:0x7f6cda22dcce [ 485.042856] Code: Bad RIP value. [ 485.042857] RSP: 002b:7ffedec2d0e0 EFLAGS: 0246 ORIG_RAX: 0101 [ 485.042859] RAX: ffda RBX: 4000 RCX: 7f6cda22dcce [ 485.042860] RDX: 4000 RSI: 55be36cfd870 RDI: ff9c [ 485.042861] RBP: 55be36cfd870 R08: 55be36cfd870 R09: [ 485.042862] R10: R11: 0246 R12: 7ffedec2d3a0 [ 485.042863] R13: R14: 0001 R15: 55be36cfcbb0 [ 495.386112] kauditd_printk_skb: 1 callbacks suppressed [ 495.386114] audit: type=1400 audit(1565682010.026:62): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="snap.lxd.activate" pid=15020 comm="apparmor_parser" [ 495.386659] audit: type=1400 audit(1565682010.026:63): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="snap.lxd.benchmark" pid=15021 comm="apparmor_parser" [ 495.516297] audit: type=1400 audit(1565682010.158:64): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="snap.lxd.buginfo" pid=15022 comm="apparmor_parser" [ 495.516773] audit: type=1400 audit(1565682010.158:65): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="snap.lxd.check-kernel" pid=15023 comm="apparmor_parser" [ 495.663497] audit: type=1400 audit(1565682010.306:66): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="snap.lxd.hook.configure" pid=15025 comm="apparmor_parser" [ 495.721415] audit: type=1400 audit(1565682010.362:67): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="snap.lxd.daemon" pid=15024 comm="apparmor_parser" [ 495.741053] audit: type=1400 audit(1565682010.382:68): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="snap.lxd.hook.install" pid=15026 comm="apparmor_parser" [ 495.847228] audit: type=1400 audit(1565682010.490:69): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="snap.lxd.lxc" pid=15027 comm="apparmor_parser" [ 495.859690] audit: type=1400 audit(1565682010.502:70): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="snap.lxd.lxd" pid=15028 comm="apparmor_parser" [ 495.924648] audit: type=1400 audit(1565682010.566:71): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="snap.lxd.migrate" pid=15029 comm="apparmor_parser" [ 605.855134] INFO: task mdadm:11824 blocked for more than 120 seconds. [ 605.861358] Not tainted 5.0.0-15-generic #16-Ubuntu [ 605.866526] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 605.874078] mdadm D0 11824 11818 0x [ 605.874082] Call Trace: [ 605.874091] __schedule+0x2d0/0x840 [ 605.874093] ? __switch_to_asm+0x34/0x70 [ 605.874094] ? __switch_to_asm+0x40/0x70 [ 605.874096] schedule+0x2c/0x70 [ 605.874098] schedule_timeout+0x258/0x360 [ 605.874101] wait_for_completion+0xb7/0x140 [ 605.874104] ? wake_up_q+0x80/0x80 [ 605.874108] __floppy_read_block_0+0x138/0x190 [floppy] [ 605.874110] ? floppy_cmos_show+0x30/0x30 [floppy] [ 605.874113] floppy_revalidate+0xf8/0x230
[Kernel-packages] [Bug 1825413] Re: mdadm, mkfs, other io commands hang, stuck task, bad rip
Sorry, I missed responding. This were run in separate VMs, this is under our curtin vmtest integration testing. Yes, let me get the q35 trace; it doesn't happen as often. -- 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/1825413 Title: mdadm, mkfs, other io commands hang, stuck task, bad rip Status in linux package in Ubuntu: Confirmed Bug description: 1. disco 2. # apt-cache policy linux-image-virtual linux-image-virtual: Installed: 5.0.0.13.14 Candidate: 5.0.0.13.14 Version table: *** 5.0.0.13.14 500 500 http://archive.ubuntu.com/ubuntu disco/main amd64 Packages 100 /var/lib/dpkg/status 3. installation completes sucessfully 4. Running an installation of Disco creating filesystems and probing things will hang (stuck task) every so often. When it happens, the kernel throws an oops and bad rip value. [ 967.810391] INFO: task mdadm:12213 blocked for more than 120 seconds. [ 967.811787] Tainted: P O 5.0.0-13-generic #14-Ubuntu [ 967.813330] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 967.815500] mdadm D0 12213 12207 0x [ 967.815503] Call Trace: [ 967.815509] __schedule+0x2d0/0x840 [ 967.815511] ? __switch_to_asm+0x40/0x70 [ 967.815512] ? __switch_to_asm+0x34/0x70 [ 967.815514] schedule+0x2c/0x70 [ 967.815516] schedule_preempt_disabled+0xe/0x10 [ 967.815518] __mutex_lock.isra.10+0x2e4/0x4c0 [ 967.815522] ? exact_lock+0x11/0x20 [ 967.815524] __mutex_lock_slowpath+0x13/0x20 [ 967.815528] mutex_lock+0x2c/0x30 [ 967.815530] __blkdev_get+0x7b/0x550 [ 967.815532] ? bd_acquire+0xd0/0xd0 [ 967.815533] blkdev_get+0x10c/0x330 [ 967.815535] ? bd_acquire+0xd0/0xd0 [ 967.815537] blkdev_open+0x92/0x100 [ 967.815539] do_dentry_open+0x143/0x3a0 [ 967.815540] vfs_open+0x2d/0x30 [ 967.815542] path_openat+0x2d4/0x16d0 [ 967.815547] ? put_device+0x17/0x20 [ 967.815552] ? scsi_device_put+0x2b/0x30 [ 967.815553] do_filp_open+0x93/0x100 [ 967.81] ? strncpy_from_user+0x56/0x1b0 [ 967.815558] ? __alloc_fd+0x46/0x140 [ 967.815560] do_sys_open+0x177/0x280 [ 967.815561] ? _cond_resched+0x19/0x30 [ 967.815563] __x64_sys_openat+0x20/0x30 [ 967.815566] do_syscall_64+0x5a/0x110 [ 967.815567] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 967.815568] RIP: 0033:0x7faa36406cce [ 967.815572] Code: Bad RIP value. [ 967.815573] RSP: 002b:7ffedb663f80 EFLAGS: 0246 ORIG_RAX: 0101 [ 967.815574] RAX: ffda RBX: 4000 RCX: 7faa36406cce [ 967.815575] RDX: 4000 RSI: 564df70257b0 RDI: ff9c [ 967.815576] RBP: 564df70257b0 R08: 564df70257b0 R09: [ 967.815576] R10: R11: 0246 R12: 7ffedb664240 [ 967.815577] R13: R14: 0001 R15: 564df7023e00 [ 967.799227] INFO: task mkfs.btrfs:3767 blocked for more than 120 seconds. [ 967.803509] Tainted: P O 5.0.0-13-generic #14-Ubuntu [ 967.807192] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 967.810235] mkfs.btrfs D0 3767 1866 0x [ 967.810239] Call Trace: [ 967.810251] __schedule+0x2d0/0x840 [ 967.810254] ? __switch_to_asm+0x34/0x70 [ 967.810256] ? __switch_to_asm+0x40/0x70 [ 967.810258] schedule+0x2c/0x70 [ 967.810260] schedule_timeout+0x258/0x360 [ 967.810277] wait_for_completion+0xb7/0x140 [ 967.810281] ? wake_up_q+0x80/0x80 [ 967.810293] __floppy_read_block_0+0x138/0x190 [floppy] [ 967.810298] ? floppy_cmos_show+0x30/0x30 [floppy] [ 967.810302] floppy_revalidate+0xf8/0x230 [floppy] [ 967.810307] check_disk_change+0x62/0x70 [ 967.810309] floppy_open+0x2ae/0x380 [floppy] [ 967.810311] __blkdev_get+0xe5/0x550 [ 967.810313] ? bd_acquire+0xd0/0xd0 [ 967.810315] blkdev_get+0x10c/0x330 [ 967.810316] ? bd_acquire+0xd0/0xd0 [ 967.810318] blkdev_open+0x92/0x100 [ 967.810321] do_dentry_open+0x143/0x3a0 [ 967.810323] vfs_open+0x2d/0x30 [ 967.810326] path_openat+0x2d4/0x16d0 [ 967.810328] ? filename_lookup.part.60+0xe0/0x170 [ 967.810332] ? strncpy_from_user+0x56/0x1b0 [ 967.810333] do_filp_open+0x93/0x100 [ 967.810353] ? strncpy_from_user+0x56/0x1b0 [ 967.810358] ? __alloc_fd+0x46/0x140 [ 967.810360] do_sys_open+0x177/0x280 [ 967.810362] ? _cond_resched+0x19/0x30 [ 967.810364] __x64_sys_openat+0x20/0x30 [ 967.810368] do_syscall_64+0x5a/0x110 [ 967.810369] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 967.810372] RIP: 0033:0x7f46b99374db [ 967.810377] Code: Bad RIP value. [ 967.810378] RSP: 002b:7ffc9e849d70 EFLAGS: 0246 ORIG_RAX: 0101 [
Re: [Kernel-packages] [Bug 1825413] Re: mdadm, mkfs, other io commands hang, stuck task, bad rip
On Mon, Apr 22, 2019 at 08:20:30PM -, Ryan Harper wrote: > Hi Seth, > > notice only one of the stack tracks have the floppy, the mdadm one does > not. I've also recreated this on a qemu q35 machine type which does not > include the floppy device. I looked at the madm stack trace, and I was assuming that it occurred during the same boot as the other one. I suppose I shouldn't have, but it would make sense. mdadm appears to be blocked on a block device's bd_mutex, so the cause is probably something else that has hung while holding that mutex. The mkfs stack trace would be just the kind of thing to create the mdadm stack trace, if it were trying to open the same device. So, were those traces from a single boot or from different boots? Can you provide stack trace(s) from the q35 machine type for comparison? Thanks! -- 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/1825413 Title: mdadm, mkfs, other io commands hang, stuck task, bad rip Status in linux package in Ubuntu: Confirmed Bug description: 1. disco 2. # apt-cache policy linux-image-virtual linux-image-virtual: Installed: 5.0.0.13.14 Candidate: 5.0.0.13.14 Version table: *** 5.0.0.13.14 500 500 http://archive.ubuntu.com/ubuntu disco/main amd64 Packages 100 /var/lib/dpkg/status 3. installation completes sucessfully 4. Running an installation of Disco creating filesystems and probing things will hang (stuck task) every so often. When it happens, the kernel throws an oops and bad rip value. [ 967.810391] INFO: task mdadm:12213 blocked for more than 120 seconds. [ 967.811787] Tainted: P O 5.0.0-13-generic #14-Ubuntu [ 967.813330] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 967.815500] mdadm D0 12213 12207 0x [ 967.815503] Call Trace: [ 967.815509] __schedule+0x2d0/0x840 [ 967.815511] ? __switch_to_asm+0x40/0x70 [ 967.815512] ? __switch_to_asm+0x34/0x70 [ 967.815514] schedule+0x2c/0x70 [ 967.815516] schedule_preempt_disabled+0xe/0x10 [ 967.815518] __mutex_lock.isra.10+0x2e4/0x4c0 [ 967.815522] ? exact_lock+0x11/0x20 [ 967.815524] __mutex_lock_slowpath+0x13/0x20 [ 967.815528] mutex_lock+0x2c/0x30 [ 967.815530] __blkdev_get+0x7b/0x550 [ 967.815532] ? bd_acquire+0xd0/0xd0 [ 967.815533] blkdev_get+0x10c/0x330 [ 967.815535] ? bd_acquire+0xd0/0xd0 [ 967.815537] blkdev_open+0x92/0x100 [ 967.815539] do_dentry_open+0x143/0x3a0 [ 967.815540] vfs_open+0x2d/0x30 [ 967.815542] path_openat+0x2d4/0x16d0 [ 967.815547] ? put_device+0x17/0x20 [ 967.815552] ? scsi_device_put+0x2b/0x30 [ 967.815553] do_filp_open+0x93/0x100 [ 967.81] ? strncpy_from_user+0x56/0x1b0 [ 967.815558] ? __alloc_fd+0x46/0x140 [ 967.815560] do_sys_open+0x177/0x280 [ 967.815561] ? _cond_resched+0x19/0x30 [ 967.815563] __x64_sys_openat+0x20/0x30 [ 967.815566] do_syscall_64+0x5a/0x110 [ 967.815567] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 967.815568] RIP: 0033:0x7faa36406cce [ 967.815572] Code: Bad RIP value. [ 967.815573] RSP: 002b:7ffedb663f80 EFLAGS: 0246 ORIG_RAX: 0101 [ 967.815574] RAX: ffda RBX: 4000 RCX: 7faa36406cce [ 967.815575] RDX: 4000 RSI: 564df70257b0 RDI: ff9c [ 967.815576] RBP: 564df70257b0 R08: 564df70257b0 R09: [ 967.815576] R10: R11: 0246 R12: 7ffedb664240 [ 967.815577] R13: R14: 0001 R15: 564df7023e00 [ 967.799227] INFO: task mkfs.btrfs:3767 blocked for more than 120 seconds. [ 967.803509] Tainted: P O 5.0.0-13-generic #14-Ubuntu [ 967.807192] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 967.810235] mkfs.btrfs D0 3767 1866 0x [ 967.810239] Call Trace: [ 967.810251] __schedule+0x2d0/0x840 [ 967.810254] ? __switch_to_asm+0x34/0x70 [ 967.810256] ? __switch_to_asm+0x40/0x70 [ 967.810258] schedule+0x2c/0x70 [ 967.810260] schedule_timeout+0x258/0x360 [ 967.810277] wait_for_completion+0xb7/0x140 [ 967.810281] ? wake_up_q+0x80/0x80 [ 967.810293] __floppy_read_block_0+0x138/0x190 [floppy] [ 967.810298] ? floppy_cmos_show+0x30/0x30 [floppy] [ 967.810302] floppy_revalidate+0xf8/0x230 [floppy] [ 967.810307] check_disk_change+0x62/0x70 [ 967.810309] floppy_open+0x2ae/0x380 [floppy] [ 967.810311] __blkdev_get+0xe5/0x550 [ 967.810313] ? bd_acquire+0xd0/0xd0 [ 967.810315] blkdev_get+0x10c/0x330 [ 967.810316] ? bd_acquire+0xd0/0xd0 [ 967.810318] blkdev_open+0x92/0x100 [ 967.810321] do_dentry_open+0x143/0x3a0 [ 967.810323] vfs_open+0x2d/0x30 [ 967.810326]
[Kernel-packages] [Bug 1825413] Re: mdadm, mkfs, other io commands hang, stuck task, bad rip
Hi Seth, notice only one of the stack tracks have the floppy, the mdadm one does not. I've also recreated this on a qemu q35 machine type which does not include the floppy device. -- 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/1825413 Title: mdadm, mkfs, other io commands hang, stuck task, bad rip Status in linux package in Ubuntu: Confirmed Bug description: 1. disco 2. # apt-cache policy linux-image-virtual linux-image-virtual: Installed: 5.0.0.13.14 Candidate: 5.0.0.13.14 Version table: *** 5.0.0.13.14 500 500 http://archive.ubuntu.com/ubuntu disco/main amd64 Packages 100 /var/lib/dpkg/status 3. installation completes sucessfully 4. Running an installation of Disco creating filesystems and probing things will hang (stuck task) every so often. When it happens, the kernel throws an oops and bad rip value. [ 967.810391] INFO: task mdadm:12213 blocked for more than 120 seconds. [ 967.811787] Tainted: P O 5.0.0-13-generic #14-Ubuntu [ 967.813330] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 967.815500] mdadm D0 12213 12207 0x [ 967.815503] Call Trace: [ 967.815509] __schedule+0x2d0/0x840 [ 967.815511] ? __switch_to_asm+0x40/0x70 [ 967.815512] ? __switch_to_asm+0x34/0x70 [ 967.815514] schedule+0x2c/0x70 [ 967.815516] schedule_preempt_disabled+0xe/0x10 [ 967.815518] __mutex_lock.isra.10+0x2e4/0x4c0 [ 967.815522] ? exact_lock+0x11/0x20 [ 967.815524] __mutex_lock_slowpath+0x13/0x20 [ 967.815528] mutex_lock+0x2c/0x30 [ 967.815530] __blkdev_get+0x7b/0x550 [ 967.815532] ? bd_acquire+0xd0/0xd0 [ 967.815533] blkdev_get+0x10c/0x330 [ 967.815535] ? bd_acquire+0xd0/0xd0 [ 967.815537] blkdev_open+0x92/0x100 [ 967.815539] do_dentry_open+0x143/0x3a0 [ 967.815540] vfs_open+0x2d/0x30 [ 967.815542] path_openat+0x2d4/0x16d0 [ 967.815547] ? put_device+0x17/0x20 [ 967.815552] ? scsi_device_put+0x2b/0x30 [ 967.815553] do_filp_open+0x93/0x100 [ 967.81] ? strncpy_from_user+0x56/0x1b0 [ 967.815558] ? __alloc_fd+0x46/0x140 [ 967.815560] do_sys_open+0x177/0x280 [ 967.815561] ? _cond_resched+0x19/0x30 [ 967.815563] __x64_sys_openat+0x20/0x30 [ 967.815566] do_syscall_64+0x5a/0x110 [ 967.815567] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 967.815568] RIP: 0033:0x7faa36406cce [ 967.815572] Code: Bad RIP value. [ 967.815573] RSP: 002b:7ffedb663f80 EFLAGS: 0246 ORIG_RAX: 0101 [ 967.815574] RAX: ffda RBX: 4000 RCX: 7faa36406cce [ 967.815575] RDX: 4000 RSI: 564df70257b0 RDI: ff9c [ 967.815576] RBP: 564df70257b0 R08: 564df70257b0 R09: [ 967.815576] R10: R11: 0246 R12: 7ffedb664240 [ 967.815577] R13: R14: 0001 R15: 564df7023e00 [ 967.799227] INFO: task mkfs.btrfs:3767 blocked for more than 120 seconds. [ 967.803509] Tainted: P O 5.0.0-13-generic #14-Ubuntu [ 967.807192] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 967.810235] mkfs.btrfs D0 3767 1866 0x [ 967.810239] Call Trace: [ 967.810251] __schedule+0x2d0/0x840 [ 967.810254] ? __switch_to_asm+0x34/0x70 [ 967.810256] ? __switch_to_asm+0x40/0x70 [ 967.810258] schedule+0x2c/0x70 [ 967.810260] schedule_timeout+0x258/0x360 [ 967.810277] wait_for_completion+0xb7/0x140 [ 967.810281] ? wake_up_q+0x80/0x80 [ 967.810293] __floppy_read_block_0+0x138/0x190 [floppy] [ 967.810298] ? floppy_cmos_show+0x30/0x30 [floppy] [ 967.810302] floppy_revalidate+0xf8/0x230 [floppy] [ 967.810307] check_disk_change+0x62/0x70 [ 967.810309] floppy_open+0x2ae/0x380 [floppy] [ 967.810311] __blkdev_get+0xe5/0x550 [ 967.810313] ? bd_acquire+0xd0/0xd0 [ 967.810315] blkdev_get+0x10c/0x330 [ 967.810316] ? bd_acquire+0xd0/0xd0 [ 967.810318] blkdev_open+0x92/0x100 [ 967.810321] do_dentry_open+0x143/0x3a0 [ 967.810323] vfs_open+0x2d/0x30 [ 967.810326] path_openat+0x2d4/0x16d0 [ 967.810328] ? filename_lookup.part.60+0xe0/0x170 [ 967.810332] ? strncpy_from_user+0x56/0x1b0 [ 967.810333] do_filp_open+0x93/0x100 [ 967.810353] ? strncpy_from_user+0x56/0x1b0 [ 967.810358] ? __alloc_fd+0x46/0x140 [ 967.810360] do_sys_open+0x177/0x280 [ 967.810362] ? _cond_resched+0x19/0x30 [ 967.810364] __x64_sys_openat+0x20/0x30 [ 967.810368] do_syscall_64+0x5a/0x110 [ 967.810369] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 967.810372] RIP: 0033:0x7f46b99374db [ 967.810377] Code: Bad RIP value. [ 967.810378] RSP: 002b:7ffc9e849d70 EFLAGS: 0246 ORIG_RAX: 0101 [
[Kernel-packages] [Bug 1825413] Re: mdadm, mkfs, other io commands hang, stuck task, bad rip
Looks like something going wrong with the floppy driver. From the description this sounds like a race. I note that a bug with essentially the same stack trace was fixed in 4.20, de7b75d82f70 "floppy: fix race condition in __floppy_read_block_0()." We have that fix though, so not sure what is causing it here. -- 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/1825413 Title: mdadm, mkfs, other io commands hang, stuck task, bad rip Status in linux package in Ubuntu: Confirmed Bug description: 1. disco 2. # apt-cache policy linux-image-virtual linux-image-virtual: Installed: 5.0.0.13.14 Candidate: 5.0.0.13.14 Version table: *** 5.0.0.13.14 500 500 http://archive.ubuntu.com/ubuntu disco/main amd64 Packages 100 /var/lib/dpkg/status 3. installation completes sucessfully 4. Running an installation of Disco creating filesystems and probing things will hang (stuck task) every so often. When it happens, the kernel throws an oops and bad rip value. [ 967.810391] INFO: task mdadm:12213 blocked for more than 120 seconds. [ 967.811787] Tainted: P O 5.0.0-13-generic #14-Ubuntu [ 967.813330] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 967.815500] mdadm D0 12213 12207 0x [ 967.815503] Call Trace: [ 967.815509] __schedule+0x2d0/0x840 [ 967.815511] ? __switch_to_asm+0x40/0x70 [ 967.815512] ? __switch_to_asm+0x34/0x70 [ 967.815514] schedule+0x2c/0x70 [ 967.815516] schedule_preempt_disabled+0xe/0x10 [ 967.815518] __mutex_lock.isra.10+0x2e4/0x4c0 [ 967.815522] ? exact_lock+0x11/0x20 [ 967.815524] __mutex_lock_slowpath+0x13/0x20 [ 967.815528] mutex_lock+0x2c/0x30 [ 967.815530] __blkdev_get+0x7b/0x550 [ 967.815532] ? bd_acquire+0xd0/0xd0 [ 967.815533] blkdev_get+0x10c/0x330 [ 967.815535] ? bd_acquire+0xd0/0xd0 [ 967.815537] blkdev_open+0x92/0x100 [ 967.815539] do_dentry_open+0x143/0x3a0 [ 967.815540] vfs_open+0x2d/0x30 [ 967.815542] path_openat+0x2d4/0x16d0 [ 967.815547] ? put_device+0x17/0x20 [ 967.815552] ? scsi_device_put+0x2b/0x30 [ 967.815553] do_filp_open+0x93/0x100 [ 967.81] ? strncpy_from_user+0x56/0x1b0 [ 967.815558] ? __alloc_fd+0x46/0x140 [ 967.815560] do_sys_open+0x177/0x280 [ 967.815561] ? _cond_resched+0x19/0x30 [ 967.815563] __x64_sys_openat+0x20/0x30 [ 967.815566] do_syscall_64+0x5a/0x110 [ 967.815567] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 967.815568] RIP: 0033:0x7faa36406cce [ 967.815572] Code: Bad RIP value. [ 967.815573] RSP: 002b:7ffedb663f80 EFLAGS: 0246 ORIG_RAX: 0101 [ 967.815574] RAX: ffda RBX: 4000 RCX: 7faa36406cce [ 967.815575] RDX: 4000 RSI: 564df70257b0 RDI: ff9c [ 967.815576] RBP: 564df70257b0 R08: 564df70257b0 R09: [ 967.815576] R10: R11: 0246 R12: 7ffedb664240 [ 967.815577] R13: R14: 0001 R15: 564df7023e00 [ 967.799227] INFO: task mkfs.btrfs:3767 blocked for more than 120 seconds. [ 967.803509] Tainted: P O 5.0.0-13-generic #14-Ubuntu [ 967.807192] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 967.810235] mkfs.btrfs D0 3767 1866 0x [ 967.810239] Call Trace: [ 967.810251] __schedule+0x2d0/0x840 [ 967.810254] ? __switch_to_asm+0x34/0x70 [ 967.810256] ? __switch_to_asm+0x40/0x70 [ 967.810258] schedule+0x2c/0x70 [ 967.810260] schedule_timeout+0x258/0x360 [ 967.810277] wait_for_completion+0xb7/0x140 [ 967.810281] ? wake_up_q+0x80/0x80 [ 967.810293] __floppy_read_block_0+0x138/0x190 [floppy] [ 967.810298] ? floppy_cmos_show+0x30/0x30 [floppy] [ 967.810302] floppy_revalidate+0xf8/0x230 [floppy] [ 967.810307] check_disk_change+0x62/0x70 [ 967.810309] floppy_open+0x2ae/0x380 [floppy] [ 967.810311] __blkdev_get+0xe5/0x550 [ 967.810313] ? bd_acquire+0xd0/0xd0 [ 967.810315] blkdev_get+0x10c/0x330 [ 967.810316] ? bd_acquire+0xd0/0xd0 [ 967.810318] blkdev_open+0x92/0x100 [ 967.810321] do_dentry_open+0x143/0x3a0 [ 967.810323] vfs_open+0x2d/0x30 [ 967.810326] path_openat+0x2d4/0x16d0 [ 967.810328] ? filename_lookup.part.60+0xe0/0x170 [ 967.810332] ? strncpy_from_user+0x56/0x1b0 [ 967.810333] do_filp_open+0x93/0x100 [ 967.810353] ? strncpy_from_user+0x56/0x1b0 [ 967.810358] ? __alloc_fd+0x46/0x140 [ 967.810360] do_sys_open+0x177/0x280 [ 967.810362] ? _cond_resched+0x19/0x30 [ 967.810364] __x64_sys_openat+0x20/0x30 [ 967.810368] do_syscall_64+0x5a/0x110 [ 967.810369] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 967.810372] RIP: 0033:0x7f46b99374db [
[Kernel-packages] [Bug 1825413] Re: mdadm, mkfs, other io commands hang, stuck task, bad rip
root@ubuntu:~# lspci -v -nn 00:00.0 Host bridge [0600]: Intel Corporation 440FX - 82441FX PMC [Natoma] [8086:1237] (rev 02) Subsystem: Red Hat, Inc. Qemu virtual machine [1af4:1100] Flags: fast devsel 00:01.0 ISA bridge [0601]: Intel Corporation 82371SB PIIX3 ISA [Natoma/Triton II] [8086:7000] Subsystem: Red Hat, Inc. Qemu virtual machine [1af4:1100] Flags: medium devsel 00:01.1 IDE interface [0101]: Intel Corporation 82371SB PIIX3 IDE [Natoma/Triton II] [8086:7010] (prog-if 80 [ISA Compatibility mode-only controller, supports bus mastering]) Subsystem: Red Hat, Inc. Qemu virtual machine [1af4:1100] Flags: bus master, medium devsel, latency 0 [virtual] Memory at 01f0 (32-bit, non-prefetchable) [size=8] [virtual] Memory at 03f0 (type 3, non-prefetchable) [virtual] Memory at 0170 (32-bit, non-prefetchable) [size=8] [virtual] Memory at 0370 (type 3, non-prefetchable) I/O ports at c080 [size=16] Kernel driver in use: ata_piix Kernel modules: pata_acpi 00:01.3 Bridge [0680]: Intel Corporation 82371AB/EB/MB PIIX4 ACPI [8086:7113] (rev 03) Subsystem: Red Hat, Inc. Qemu virtual machine [1af4:1100] Flags: medium devsel, IRQ 9 Kernel driver in use: piix4_smbus Kernel modules: i2c_piix4 00:02.0 VGA compatible controller [0300]: Device [1234:] (rev 02) (prog-if 00 [VGA controller]) Subsystem: Red Hat, Inc. Device [1af4:1100] Flags: fast devsel Memory at fd00 (32-bit, prefetchable) [size=16M] Memory at feb9 (32-bit, non-prefetchable) [size=4K] Expansion ROM at 000c [disabled] [size=128K] Kernel driver in use: bochs-drm Kernel modules: bochs_drm 00:03.0 SCSI storage controller [0100]: Red Hat, Inc. Virtio SCSI [1af4:1004] Subsystem: Red Hat, Inc. Virtio SCSI [1af4:0008] Physical Slot: 3 Flags: bus master, fast devsel, latency 0, IRQ 11 I/O ports at c000 [size=64] Memory at feb91000 (32-bit, non-prefetchable) [size=4K] Memory at fe00 (64-bit, prefetchable) [size=16K] Capabilities: [98] MSI-X: Enable+ Count=4 Masked- Capabilities: [84] Vendor Specific Information: VirtIO: Capabilities: [70] Vendor Specific Information: VirtIO: Notify Capabilities: [60] Vendor Specific Information: VirtIO: DeviceCfg Capabilities: [50] Vendor Specific Information: VirtIO: ISR Capabilities: [40] Vendor Specific Information: VirtIO: CommonCfg Kernel driver in use: virtio-pci 00:04.0 Unclassified device [00ff]: Red Hat, Inc. Virtio RNG [1af4:1005] Subsystem: Red Hat, Inc. Virtio RNG [1af4:0004] Physical Slot: 4 Flags: bus master, fast devsel, latency 0, IRQ 10 I/O ports at c040 [size=32] Memory at fe004000 (64-bit, prefetchable) [size=16K] Capabilities: [84] Vendor Specific Information: VirtIO: Capabilities: [70] Vendor Specific Information: VirtIO: Notify Capabilities: [60] Vendor Specific Information: VirtIO: DeviceCfg Capabilities: [50] Vendor Specific Information: VirtIO: ISR Capabilities: [40] Vendor Specific Information: VirtIO: CommonCfg Kernel driver in use: virtio-pci 00:05.0 Ethernet controller [0200]: Red Hat, Inc. Virtio network device [1af4:1000] Subsystem: Red Hat, Inc. Virtio network device [1af4:0001] Physical Slot: 5 Flags: bus master, fast devsel, latency 0, IRQ 10 I/O ports at c060 [size=32] Memory at feb92000 (32-bit, non-prefetchable) [size=4K] Memory at fe008000 (64-bit, prefetchable) [size=16K] Expansion ROM at feb0 [disabled] [size=512K] Capabilities: [98] MSI-X: Enable+ Count=3 Masked- Capabilities: [84] Vendor Specific Information: VirtIO: Capabilities: [70] Vendor Specific Information: VirtIO: Notify Capabilities: [60] Vendor Specific Information: VirtIO: DeviceCfg Capabilities: [50] Vendor Specific Information: VirtIO: ISR Capabilities: [40] Vendor Specific Information: VirtIO: CommonCfg Kernel driver in use: virtio-pci -- 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/1825413 Title: mdadm, mkfs, other io commands hang, stuck task, bad rip Status in linux package in Ubuntu: Confirmed Bug description: 1. disco 2. # apt-cache policy linux-image-virtual linux-image-virtual: Installed: 5.0.0.13.14 Candidate: 5.0.0.13.14 Version table: *** 5.0.0.13.14 500 500 http://archive.ubuntu.com/ubuntu disco/main amd64 Packages 100 /var/lib/dpkg/status 3. installation completes sucessfully 4. Running an installation of Disco creating filesystems and probing things will hang (stuck task) every so often. When it happens, the
