[Qemu-devel] Infinite IRQ injection when trying windows 10

[//-//ani Nemati]

Hi,

Recently I was trying windows 10 on top of Qemu-KVM and I saw  4% of CPU is
being used all the time even when the windows VM is idle. I tested it for
nested VM (Linux(L0)->Linux(L1)->windows(L2)) and I saw CPU usage increased
upto 45%. I traced my host and I saw there is an infinite interrupt loop
which injected by qemu main process to my windows VM. I also traced the
windows machine and I saw System process is handling that interrupt. The
main qemu process injects IRQ 209 periodically. I wonder if it is a
bug!!!!!

Cheers,
Hani