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** Changed in: linux (Ubuntu)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/1710653
Title:
Reboot into linux 4.11.0-13 after update caused 100% cpu on btrfs-
cleaner/btrfs-transaction
Status in linux package in Ubuntu:
Confirmed
Bug description:
After doing no updates for a while I did a big update after the
archive transitions.
On the first boot I got btrfs-cleaner stuck at 100% CPU, sometimes
changing place with btrfs-transaction. Atop does not report a high IO
usage, only high CPU. The computer gets super slow with this.
PRC | sys 10.13s | user 0.56s | #proc 249 | #zombie 2 | #exit
1 |
CPU | sys 101% | user 5% | irq 0% | idle 293% | wait
0% |
cpu | sys 83% | user 0% | irq 0% | idle 17% | cpu000
w 0% |
cpu | sys 18% | user 2% | irq 0% | idle 81% | cpu001
w 0% |
cpu | sys 0% | user 2% | irq 0% | idle 98% | cpu002
w 0% |
cpu | sys 0% | user 2% | irq 0% | idle 98% | cpu003
w 0% |
CPL | avg1 4.23 | avg5 4.94 | avg15 3.90 | csw 14872 | intr
10422 |
MEM | tot 19.1G | free 13.8G | cache 3.0G | buff 15.4M | slab
549.2M |
SWP | tot 6.0G | free 6.0G | | vmcom 4.6G | vmlim
15.5G |
LVM | root | busy 0% | read 1 | write 0 | avio
0.00 ms |
DSK | sda | busy 0% | read 1 | write 0 | avio
0.00 ms |
NET | transport | tcpi 8 | tcpo 5 | udpi 7 | udpo
6 |
NET | network | ipi 15 | ipo 11 | ipfrw 0 | deliv
15 |
NET | wlan0 0% | pcki 14 | pcko 10 | si 1 Kbps | so
1 Kbps |
NET | lo ---- | pcki 2 | pcko 2 | si 0 Kbps | so
0 Kbps |
PID SYSCPU USRCPU VGROW RGROW RDDSK WRDSK ST EXC S CPUNR CPU CMD
1/1
423 8.95s 0.00s 0K 0K 16K 384K -- - R 0 90%
btrfs-transact
Collected data with apport-cli, hopefully this is worth something.
Will reboot and check how it goes.
ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: linux-image-4.11.0-13-generic 4.11.0-13.19
ProcVersionSignature: Ubuntu 4.11.0-13.19-generic 4.11.12
Uname: Linux 4.11.0-13-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version
k4.11.0-13-generic.
ApportVersion: 2.20.6-0ubuntu5
Architecture: amd64
ArecordDevices:
Home directory not accessible: Permission denied
**** List of CAPTURE Hardware Devices ****
card 1: PCH [HDA Intel PCH], device 0: CX20751/2 Analog [CX20751/2 Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: tdaitx 2812 F.... pulseaudio
/dev/snd/controlC1: tdaitx 2812 F.... pulseaudio
Card0.Amixer.info:
Card hw:0 'HDMI'/'HDA Intel HDMI at 0xf711c000 irq 49'
Mixer name : 'Intel Broadwell HDMI'
Components : 'HDA:80862808,80860101,00100000'
Controls : 35
Simple ctrls : 5
Card1.Amixer.info:
Card hw:1 'PCH'/'HDA Intel PCH at 0xf7118000 irq 48'
Mixer name : 'Conexant CX20751/2'
Components : 'HDA:14f1510f,1043183d,00100100'
Controls : 20
Simple ctrls : 9
Date: Mon Aug 14 11:50:30 2017
HibernationDevice: #RESUME=/dev/mapper/asus_vg-swap
Lsusb:
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 004: ID 8087:0a2a Intel Corp.
Bus 001 Device 003: ID 03eb:8b06 Atmel Corp.
Bus 001 Device 002: ID 064e:9700 Suyin Corp. Asus Integrated Webcam
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: ASUSTeK COMPUTER INC. UX303LAB
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: root=/dev/mapper/root rootflags=subvol=@,compress ro
i915.modeset=1 video=i915 quiet splash
cryptopts=target=root,source=UUID=36b37f43-e457-4be2-becc-4a49ca1d5b71
fbcon=scrollback:8192k
PulseList:
Error: command ['pacmd', 'list'] failed with exit code 1: Home directory not
accessible: Permission denied
No PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
linux-restricted-modules-4.11.0-13-generic N/A
linux-backports-modules-4.11.0-13-generic N/A
linux-firmware 1.167
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 12/11/2014
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: UX303LAB.203
dmi.board.asset.tag: ATN12345678901234567
dmi.board.name: UX303LAB
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: 1.0
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK COMPUTER INC.
dmi.chassis.version: 1.0
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvrUX303LAB.203:bd12/11/2014:svnASUSTeKCOMPUTERINC.:pnUX303LAB:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnUX303LAB:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:
dmi.product.name: UX303LAB
dmi.product.version: 1.0
dmi.sys.vendor: ASUSTeK COMPUTER INC.
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