On 07/31/2012 12:23 PM, Stefan Hajnoczi wrote:
On Mon, Jul 30, 2012 at 7:08 PM, Bernd Schubert
I took a quick glance where skb_recv_done is registered at all and traced it
back to vp_find_vqs(). Looking into that function I noticed MSI and so tried
to boot with pci=nomsi. And indeed I guessed it right, with pci=nomsi I
don't get any lockups anymore.
Am I the only one booting kvm-qemu usually with enabled MSI?
MSI enabled is good and is the default with modern qemu-kvm + guest OSes.
Michael: Any ideas?
I just tried to boot with -net...,vectors=0 and -net...,vectors=32, both
time it locks up. So MSI-X vs. MSI does not make a difference.
I don't have any time to further track that down right now. Shall I open
a bugzilla ticket so that it won't be forgotten?
And I also tend to make a simple patch to let virtio-net always use
normal interrupts as users usually don't like lock ups... But then I
still don't understand why I seem to be the only one running into it (or
at least I'm the only one complaining loudly).
Cheers,
Bernd
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