[ kvm-Bugs-1772966 ] host cpu usage is 100% all the time with XP guest

[ kvm-Bugs-1772966 ] host cpu usage is 100% all the time with XP guest

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Bugs item #1772966, was opened at 2007-08-13 11:39
Message generated for change (Tracker Item Submitted) made by Item Submitter
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Category: None
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Gildas Le Nadan (entr0pie)
Assigned to: Nobody/Anonymous (nobody)
Summary: host cpu usage is 100% all the time with XP guest

Initial Comment:
Hi,

My host is a HP laptop with a core 2 T7200  @ 2.00GHz,
running Ubuntu 7.04 with their stock kernel 2.6.20-16-generic and a manually compiled kvm-33.

When I run a windows XP guest, host cpu usage is always 100% even if the guest reports a lower cpu usage (see screenshot showing this behaviour). This behaviour doesn´t happen with a Linux Debian guest.

Guest is ran using:

qemu-system-x86_64 -smp 2 -hda win_xp.qcow -vnc :1 -net user -net nic &

Please advice on any test to help you identify this issue.

Regards,
Gildas

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