This change was made by a bot.
** Changed in: linux (Ubuntu)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/1662573
Title:
bcache ioutil to 100% needs node reboot (no kern logs related)
Status in linux package in Ubuntu:
Confirmed
Bug description:
bcache (bcache0 in this sample) ioutil goes to 100% and avgqu-sz also
gets affected. Bcache slaves don't get affected, but does affect
storage performance.
See excerpt (bcache0):
http://pastebin.ubuntu.com/23948463/
* Bcache blocks are running Ceph OSDs.
* HW is PowerEdge R730xd
* Kernel version is: 4.4.0-51-generic
* Ubuntu 14.04.5 LTS
* bcache-tools 1.0.7-1~14.04.1
Please let me know if you would need further detail.
---
AlsaDevices:
total 0
crw-rw---- 1 root audio 116, 1 Feb 7 12:45 seq
crw-rw---- 1 root audio 116, 33 Feb 7 12:45 timer
AplayDevices: Error: [Errno 2] No such file or directory
ApportVersion: 2.14.1-0ubuntu3.21
Architecture: amd64
ArecordDevices: Error: [Errno 2] No such file or directory
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq',
'/dev/snd/timer'] failed with exit code 1:
DistroRelease: Ubuntu 14.04
IwConfig: Error: [Errno 2] No such file or directory
Lsusb:
Bus 002 Device 002: ID 8087:8002 Intel Corp.
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 003: ID 413c:a001 Dell Computer Corp. Hub
Bus 001 Device 002: ID 8087:800a Intel Corp.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: Dell Inc. PowerEdge R730xd
Package: linux (not installed)
PciMultimedia:
ProcEnviron:
TERM=screen
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcFB:
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-51-generic
root=UUID=dc9574d7-cd8b-4db0-af85-db73ea17df65 ro console=tty0
console=ttyS0,115200n8
ProcVersionSignature: Ubuntu 4.4.0-51.72~14.04.1-generic 4.4.30
RelatedPackageVersions:
linux-restricted-modules-4.4.0-51-generic N/A
linux-backports-modules-4.4.0-51-generic N/A
linux-firmware 1.127.22
RfKill: Error: [Errno 2] No such file or directory
Tags: trusty uec-images
Uname: Linux 4.4.0-51-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups:
_MarkForUpload: True
dmi.bios.date: 08/28/2014
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 1.0.4
dmi.board.name: 0H21J3
dmi.board.vendor: Dell Inc.
dmi.board.version: A04
dmi.chassis.type: 23
dmi.chassis.vendor: Dell Inc.
dmi.modalias:
dmi:bvnDellInc.:bvr1.0.4:bd08/28/2014:svnDellInc.:pnPowerEdgeR730xd:pvr:rvnDellInc.:rn0H21J3:rvrA04:cvnDellInc.:ct23:cvr:
dmi.product.name: PowerEdge R730xd
dmi.sys.vendor: Dell Inc.
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