Public bug reported:
I initially reported this as a bug in LXC
(https://github.com/lxc/lxc/issues/424), but I was (rightfully) advised
to report this as a kernel issue instead:
I'm running Ubuntu 14.04.1 LTS (x86_64) on my Laptop. Current Kernel
version is "3.13.0-44-generic". The LXC version is "1.0.7-0ubuntu0.1",
installed from the "ubuntu-lxc" PPA on Launchpad.
I have a dedicated Btrfs file system mounted on /container/, which I use
for storing all LXC containers.
The file system is created on top of a logical volume:
lenz@lenz-ThinkPad-T440 ~ % mount | grep container
/dev/mapper/ubuntu--vg-container on /container type btrfs (rw)
lenz@lenz-ThinkPad-T440 ~ % sudo lvdisplay /dev/mapper/ubuntu--vg-container
--- Logical volume ---
LV Path /dev/ubuntu-vg/container
LV Name container
VG Name ubuntu-vg
LV UUID JUq21P-SSoS-UeU5-rdDS-k6V4-d30e-gJM1FA
LV Write Access read/write
LV Creation host, time lenz-ThinkPad-T440, 2014-09-15 13:42:27 +0200
LV Status available
# open 1
LV Size 65,00 GiB
Current LE 16640
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 252:5
The hard disk drive is a Samsung SSD ("Samsung SSD 840 EVO 500GB,
EXT0BB0Q, max UDMA/133", according to dmesg).
I have a number containers based on CentOS 6, these were created by
cloning a base image using lxc-clone -s.
Quite frequently, when I create heavy disk I/O in one or several of
these containers (e.g. by running yum update concurrently, or by
transferring large files e.g. via a HTTP upload to one of the container
instances), my host system freezes. This only happens when container
activity is involved, the system runs stable otherwise. Most of the time
the X desktop freezes, sometimes a Kernel panic can be observed on the
console. Unfortunately I'm unable to capture it other than by taking a
picture. The only solution is to perform a cold reboot using the power
button.
This occurred to me before. I then re-created the /container/ file
system from scratch and started again. But now it's happening again, so
I would like to report it for investigation.
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-generic 3.13.0.44.51
ProcVersionSignature: Ubuntu 3.13.0-44.73-generic 3.13.11-ckt12
Uname: Linux 3.13.0-44-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.6
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: lenz 2782 F.... pulseaudio
/dev/snd/controlC0: lenz 2782 F.... pulseaudio
CurrentDesktop: Unity
Date: Wed Jan 28 16:16:20 2015
HibernationDevice: RESUME=UUID=a60307c3-e53f-473e-ba9e-90cbfe484bb8
InstallationDate: Installed on 2014-09-15 (135 days ago)
InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
MachineType: LENOVO 20B6005YGE
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.13.0-44-generic
root=/dev/mapper/ubuntu--vg-root ro softlockup_panic=1 elevator=noop quiet
splash nomdmonddf nomdmonisw vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-3.13.0-44-generic N/A
linux-backports-modules-3.13.0-44-generic N/A
linux-firmware 1.127.11
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 09/03/2014
dmi.bios.vendor: LENOVO
dmi.bios.version: GJET79WW (2.29 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20B6005YGE
dmi.board.vendor: LENOVO
dmi.board.version: 0B98401 PRO
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias:
dmi:bvnLENOVO:bvrGJET79WW(2.29):bd09/03/2014:svnLENOVO:pn20B6005YGE:pvrThinkPadT440:rvnLENOVO:rn20B6005YGE:rvr0B98401PRO:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 20B6005YGE
dmi.product.version: ThinkPad T440
dmi.sys.vendor: LENOVO
** Affects: linux (Ubuntu)
Importance: Undecided
Status: Confirmed
** Tags: amd64 apport-bug third-party-packages trusty
** Attachment added: "Screen shot of a kernel panic"
https://bugs.launchpad.net/bugs/1415510/+attachment/4307289/+files/IMG_20150128_133720.jpg
** Summary changed:
- Frequent kernel panics when doing heavy I/O in containers on Btrfs
+ Frequent kernel panics when doing heavy I/O in LXC containers on Btrfs
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https://bugs.launchpad.net/bugs/1415510
Title:
Frequent kernel panics when doing heavy I/O in LXC containers on Btrfs
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