Re: [libvirt] Passing -no-kvm-irqchip to KVM/QEMU guests
On Sun, Sep 13, 2009 at 09:33:01PM -0400, Jim Paris wrote:
Garry Dolley wrote:
> Dear libvirt,
>
> Is there a way to tell a KVM/QEMU guest managed by libvirt to start
> with the "-no-kvm-irqchip" argument?
>
> I have some FreeBSD 7 guests with timing issues, and if I try to
> start the VMs manually with -no-kvm-irqchip, the timing issues go
> away (the only known workaround right now).
>
> However, if the guest is managed by libvirt, I have found no way to
> pass this command line option.
>
> I'm running libvirt 0.6.4 on Ubuntu 9.04
As a hack, you can point the XML file to a wrapper script instead of
the KVM binary, where the script would contain e.g.:
#!/bin/sh
exec /usr/bin/kvm "$@" -no-kvm-irqchip
Hi Jim,
Thanks for this suggestion, it worked like a charm!
Now, while this is still a "hacky" way to solve this problem, would
anyone be interested in seeing a patch that would either:
1) Allow one to append arbitrary command line arguments to the
emulator, like:
...
<emulator>/usr/bin/kvm<emulator>
<emulator_args>-no-kvm-irqchip</emulator_args>
...
I don't like the name "emulator_args" much either, but just as an
example.
2) Have an option in the XML file specifically for
'-no-kvm-irqchip'; I'm not sure where it would go. Maybe under
"<features>", yet it isn't really a feature, more like lack of a
feature ;)
Suggestions welcome.
I've been waiting to find some itch to scratch where I can
contribute to libvirt code directly (instead of just doc patches),
so this seems to fit the bill.
--
Garry Dolley
ARP Networks, Inc. | http://www.arpnetworks.com | (818) 206-0181
Data center, VPS, and IP Transit solutions
Member Los Angeles County REACT, Unit 336 | WQGK336
Blog http://scie.nti.st