This change was made by a bot.
** Changed in: linux (Ubuntu)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/2024879
Title:
KVM-GUEST Workqueue: writeback wb_workfn (flush-8:0)
Status in linux package in Ubuntu:
Confirmed
Bug description:
OS:
Ubuntu 5.15.0-73.80-generic 5.15.98
VERSION="22.04.2 LTS (Jammy Jellyfish)"
Ubuntu Cloud
Background Disk: rbd
KVM: Proxmox VE
[ 30.444138] loop4: detected capacity change from 0 to 8
[143428.917901] INFO: task kworker/u8:1:2954 blocked for more than 120
seconds.
[143428.919516] Not tainted 5.15.0-73-generic #80-Ubuntu
[143428.920692] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables
this message.
[143428.922329] task:kworker/u8:1 state:D stack: 0 pid: 2954 ppid:
2 flags:0x00004000
[143428.922342] Workqueue: writeback wb_workfn (flush-8:0)
[143428.922381] Call Trace:
[143428.922386] <TASK>
[143428.922412] __schedule+0x24e/0x590
[143428.922439] schedule+0x69/0x110
[143428.922443] io_schedule+0x46/0x80
[143428.922446] ? wbt_cleanup_cb+0x20/0x20
[143428.922464] rq_qos_wait+0xd0/0x170
[143428.922473] ? wbt_rqw_done+0x110/0x110
[143428.922476] ? sysv68_partition+0x280/0x280
[143428.922480] ? wbt_cleanup_cb+0x20/0x20
[143428.922482] wbt_wait+0x9f/0xf0
[143428.922485] __rq_qos_throttle+0x28/0x40
[143428.922489] blk_mq_submit_bio+0x127/0x610
[143428.922496] __submit_bio+0x1ee/0x220
[143428.922503] ? mpage_release_unused_pages+0x219/0x240
[143428.922541] submit_bio_noacct+0xc0/0x120
[143428.922545] submit_bio+0x4a/0x130
[143428.922548] ext4_io_submit+0x4c/0x60
[143428.922553] ext4_writepages+0x231/0x880
[143428.922557] ? kvm_sched_clock_read+0x11/0x20
[143428.922573] ? raw_spin_rq_lock_nested+0x17/0x80
[143428.922587] ? newidle_balance+0x31d/0x470
[143428.922595] do_writepages+0xda/0x200
[143428.922605] ? mpage_map_and_submit_extent+0x4f0/0x4f0
[143428.922609] ? do_writepages+0xda/0x200
[143428.922611] ? psi_task_switch+0xc6/0x220
[143428.922617] ? raw_spin_rq_unlock+0x10/0x30
[143428.922619] ? finish_task_switch.isra.0+0x7e/0x280
[143428.922623] __writeback_single_inode+0x44/0x290
[143428.922630] writeback_sb_inodes+0x22a/0x4e0
[143428.922635] __writeback_inodes_wb+0x56/0xf0
[143428.922639] wb_writeback+0x1cc/0x290
[143428.922643] wb_do_writeback+0x1a0/0x280
[143428.922647] wb_workfn+0x77/0x260
[143428.922649] ? psi_task_switch+0xc6/0x220
[143428.922651] ? raw_spin_rq_unlock+0x10/0x30
[143428.922654] ? finish_task_switch.isra.0+0x7e/0x280
[143428.922657] process_one_work+0x22b/0x3d0
[143428.922662] worker_thread+0x53/0x420
[143428.922664] ? process_one_work+0x3d0/0x3d0
[143428.922666] kthread+0x12a/0x150
[143428.922681] ? set_kthread_struct+0x50/0x50
[143428.922685] ret_from_fork+0x22/0x30
[143428.922697] </TASK>
[1162819.008697] loop4: detected capacity change from 0 to 129936
[1274712.829337] loop5: detected capacity change from 0 to 109072
[1274713.891842] kauditd_printk_skb: 21 callbacks suppressed
---
ProblemType: Bug
AlsaDevices:
total 0
crw-rw---- 1 root audio 116, 1 Jun 5 14:29 seq
crw-rw---- 1 root audio 116, 33 Jun 5 14:29 timer
AplayDevices: Error: [Errno 2] No such file or directory: 'aplay'
ApportVersion: 2.20.11-0ubuntu82.5
Architecture: amd64
ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord'
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq',
'/dev/snd/timer'] failed with exit code 1:
CRDA: N/A
CasperMD5CheckResult: unknown
DistroRelease: Ubuntu 22.04
IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig'
Lsusb:
Bus 001 Device 002: ID 0627:0001 Adomax Technology Co., Ltd QEMU USB Tablet
Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Lsusb-t:
/: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=uhci_hcd/2p, 12M
|__ Port 1: Dev 2, If 0, Class=Human Interface Device, Driver=usbhid, 12M
MachineType: QEMU Standard PC (i440FX + PIIX, 1996)
Package: linux (not installed)
PciMultimedia:
ProcEnviron:
TERM=vt220
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=C.UTF-8
SHELL=/bin/bash
ProcFB:
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.15.0-73-generic
root=UUID=11ac2e1a-fac8-4e81-904d-fe4e9d32b4b3 ro console=tty1 console=ttyS0
ProcVersionSignature: Ubuntu 5.15.0-73.80-generic 5.15.98
RebootRequiredPkgs: Error: path contained symlinks.
RelatedPackageVersions:
linux-restricted-modules-5.15.0-73-generic N/A
linux-backports-modules-5.15.0-73-generic N/A
linux-firmware N/A
RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
Tags: jammy uec-images
Uname: Linux 5.15.0-73-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: N/A
_MarkForUpload: True
dmi.bios.date: 04/01/2014
dmi.bios.release: 0.0
dmi.bios.vendor: SeaBIOS
dmi.bios.version: rel-1.16.1-0-g3208b098f51a-prebuilt.qemu.org
dmi.chassis.type: 1
dmi.chassis.vendor: QEMU
dmi.chassis.version: pc-i440fx-7.2
dmi.modalias:
dmi:bvnSeaBIOS:bvrrel-1.16.1-0-g3208b098f51a-prebuilt.qemu.org:bd04/01/2014:br0.0:svnQEMU:pnStandardPC(i440FX+PIIX,1996):pvrpc-i440fx-7.2:cvnQEMU:ct1:cvrpc-i440fx-7.2:sku:
dmi.product.name: Standard PC (i440FX + PIIX, 1996)
dmi.product.version: pc-i440fx-7.2
dmi.sys.vendor: QEMU
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