Since "switching to saucy kernel is a good workaround", marking this as
affecting the kernel.
Could you try disabling KSM and see if that avoids the issue?
** Also affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu)
Status: New => Incomplete
** Changed in: qemu (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1341195
Title:
KVM guests getting slow by time
Status in “linux” package in Ubuntu:
Incomplete
Status in “qemu” package in Ubuntu:
Incomplete
Bug description:
There is a post with very similar symptoms on serverfault:
http://serverfault.com/questions/609881/windows-server-2012-on-kvm-on-
ubuntu-14-04-runs-well-for-a-while-and-then-slows/612084#612084
Basically all kind of KVM guests are getting slow by time, both windows or
linux. The more running guests, it happens sooner.
Switching back to Saucy kernel is a good workaround.
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: qemu-kvm 2.0.0+dfsg-2ubuntu1.1
ProcVersionSignature: Ubuntu 3.13.0-29.53-generic 3.13.11.2
Uname: Linux 3.13.0-29-generic x86_64
NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
ApportVersion: 2.14.1-0ubuntu3.2
Architecture: amd64
Date: Sat Jul 12 22:18:49 2014
SourcePackage: qemu
UpgradeStatus: No upgrade log present (probably fresh install)
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