[Openstack-operators] Problem with Heavy Network IO and Dnsmasq

Thomas Vachon vachon at sessionm.com
Mon Aug 20 14:47:18 UTC 2012

On Mon, Aug 20, 2012 at 9:59 AM, Thomas Vachon <vachon at sessionm.com> wrote:
> On Mon, Aug 20, 2012 at 9:57 AM, Lorin Hochstein
> <lorin at nimbisservices.com> wrote:
>> On Aug 20, 2012, at 9:44 AM, Thomas Vachon <vachon at sessionm.com> wrote:
>> OK, I have a feeling I know at least how to "fix" the issue.  After
>> reading the entire thread, it seems to be 100% related to the
>> checksumming of dhcp in QEMU (which is broken).
>> Thomas:
>> Do you have a link to the upstream bug that describes the DHCP checksum
>> problem in QEMU? I'd like to add it to the docs.
>> Take care,
>> Lorin
>> --
>> Lorin Hochstein
>> Lead Architect - Cloud Services
>> Nimbis Services, Inc.
>> www.nimbisservices.com
> This is the best one I can find:
> https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/997978

I can confirm this is still happening in the latest QEMU code released
a few days ago (1.0+noroms-0ubuntu14.1).

According to the thread I referenced above, dropping to 10.04 as your
guest might fix it.  I am going to try that now.

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