[Bug 426497] Re: kqemu mode not compiled for karmic

Dustin Kirkland dustin.kirkland at gmail.com
Fri Sep 11 23:31:37 BST 2009

Thanks for the report.  We've gotten a few requests about this over the
last few weeks.  I need to respond to all of those here.

Upstream QEMU has configured kqemu off by default for 0.11, and has
completely removed the code from the tree for 0.12.  This is upstream's
acknowledgement that kqemu is simply unsupportable.

We, Ubuntu, could conceivably ./configure --enable-kqemu for the qemu-
kvm-0.11 package in Karmic, however, this would introduce (as I see it)
two serious problems...

 1) We would be shipping code (in main nonetheless) that upstream is
consciously and vocally refusing to support.   I think this unwise, at
best.  We wouldn't get any help fixing/supporting issues (even security
vulnerabilities) that come up.

 2) And more importantly, enabling kqemu has a *detrimental* effect on
ALL Ubuntu KVM users...  Enabling kqemu limits the amount of physical
memory to VM guests to ~3.5GB.  This is something I feel strongly about.
Karmic will be around for another 1.5 years, in which we can expect
hosts memory to double (at least).

I am very open to the possibility of a community maintained qemu-kvm
(+kqemu) package in the ubuntu-virt PPA.


** Changed in: qemu-kvm (Ubuntu)
       Status: Confirmed => Won't Fix

** Changed in: qemu-kvm (Ubuntu)
     Assignee: (unassigned) => Dustin Kirkland (kirkland)

kqemu mode not compiled for karmic
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