Re: Guest OS lock up with 100% cpu usage when using tap

[Avi Kivity <avi-atKUWr5tajBWk0Htik3J/w@public.gmane.org>]

Daniel Paquet wrote:
> Hello,
>
>   This is a followup from my last message stating that my guest os 
> dont load up correctly. The problem was that my xp or vista guest os 
> uses 100% cpu at startup and frequent lockup then continue to load.
>
> I played a bit with my startup parameters to find out that the problem 
> is related the to tap network interface, everything starts okay if I 
> remove the tap network from the startup parameters.
>
> So my original startup was :
> kvm -no-rtc -hda disks/vista.qcow2 -localtime -m 512 -net 
> nic,model=ne2k_pci,macaddr=00:00:00:00:00:01 -net tap,ifname=tap0 &
>
> And now I used
> kvm -no-rtc -hda disks/vista.qcow2 -localtime -m 512 -net 
> nic,model=ne2k_pci,macaddr=00:00:00:00:00:01 &
>
> And the guest os boots correctly. I have this problem with kvm-33 and 
> upward to kvm-40 (I didn't tryed older releases as I need vista).
>
> The thing is that I am using the tap interface to communicate with my 
> guest os and supply them with an Internet connection. So anyone have a 
> clue or something I may supply to help resolve this issue?
>

Interesting.  Maybe your network is flooded with broadcasts.  Try 
running wireshark or tcpdump on the tap interface and see if something 
is flowing through it at a high rate.

-- 
error compiling committee.c: too many arguments to function


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