[Bug 703811] Re: kvm guest's cpu usage with virtio storage driver goes up to 100% because of flush process

[Serge Hallyn]

Quoting Roman R (703811 at bugs.launchpad.net):
> Well, just installed ubuntu 10.10 guest on the 10.10 host on my laptop
> and i see the same problem. its fresh install and all i've done just run
> apt-get update and apt-get dist-upgrade and the flush-252:0 process
> started to use from 12% upto 100% of cpu.
> 
> any ideas?

Thanks for testing that.

Next it would be helpful to test (separately) both the latest
kernel and the latest qemu-kvm versions.

The most recent qemu-kvm upstream build is at
https://launchpad.net/~ubuntu-server-edgers/+archive/server-edgers-qemu-kvm

The kernel daily build is at
http://kernel.ubuntu.com/~kernel-ppa/mainline/daily/2011-01-19-natty/
It is for natty, but should work fine in maverick.  You can just download
http://kernel.ubuntu.com/~kernel-ppa/mainline/daily/2011-01-19-natty/linux-image-2.6.37-999-generic_2.6.37-999.201101190911_amd64.deb
and install it with dpkg -i.

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https://bugs.launchpad.net/bugs/703811

Title:
  kvm guest's cpu usage with virtio storage driver goes up to 100%
  because of flush process