KSM causing performance and instability issues
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux (Ubuntu) |
Confirmed
|
High
|
Unassigned |
Bug Description
This seems to be a bug that has regressed, I have encountered the same issue as 2 other reports:
Running kernel: 3.13.0-46-generic
This is replicated over many compute nodes (KVM) running OpenStack. The workaround is to disable KSM:
echo 2 > /sys/kernel/
This fixes the issue temporarily.
---
AlsaDevices:
total 0
crw-rw---- 1 root audio 116, 1 Mar 22 14:30 seq
crw-rw---- 1 root audio 116, 33 Mar 22 14:30 timer
AplayDevices: Error: [Errno 2] No such file or directory
ApportVersion: 2.14.1-0ubuntu3.7
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:
CRDA: Error: [Errno 2] No such file or directory
DistroRelease: Ubuntu 14.04
InstallationDate: Installed on 2014-12-14 (99 days ago)
InstallationMedia: Ubuntu-Server 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.3)
MachineType: Dell Inc. PowerEdge R620
Package: linux (not installed)
PciMultimedia:
ProcFB: 0 EFI VGA
ProcKernelCmdLine: BOOT_IMAGE=
ProcVersionSign
RelatedPackageV
linux-
linux-
linux-firmware 1.127.11
RfKill: Error: [Errno 2] No such file or directory
Tags: trusty
Uname: Linux 3.13.0-46-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups:
_MarkForUpload: True
dmi.bios.date: 01/16/2014
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 2.2.2
dmi.board.name: 01W23F
dmi.board.vendor: Dell Inc.
dmi.board.version: A05
dmi.chassis.type: 23
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.
dmi.product.name: PowerEdge R620
dmi.sys.vendor: Dell Inc.
tags: | added: apport-collected trusty |
description: | updated |
Changed in linux (Ubuntu): | |
importance: | Undecided → High |
tags: | added: kernel-da-key |
description: | updated |
Changed in linux (Ubuntu): | |
assignee: | Chris J Arges (arges) → nobody |
This bug is missing log files that will aid in diagnosing the problem. From a terminal window please run:
apport-collect 1435363
and then change the status of the bug to 'Confirmed'.
If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.
This change has been made by an automated script, maintained by the Ubuntu Kernel Team.