Hi Michael,
I'm getting a qemu crash from a load/unload of virtio_net.ko in guest
kernel with the following,
> ./x86_64-softmmu/qemu-system-x86_64 -hda
> /var/lib/libvirt/images/Fedora-test0.img \
-m 4096 -enable-kvm -smp 4 -netdev tap,id=hn0,queues=4,vhost=on \
-device virtio-net-pci,netdev=hn0,mq=on,vectors=9
in the host I do a simple
# rmmod virtio_net
# modprobe virtio_net
And bisecting points at this merge which just from the commit message
looks like it could be the culprit,
> Merge: 4eb28ab 5300063
> Author: Stefan Hajnoczi <[email protected]>
> Date: Thu Nov 3 14:41:53 2016 +0000
>
> Merge remote-tracking branch 'remotes/mst/tags/for_upstream' into staging
>
> virtio, pc: fixes and features
>
> nvdimm hotplug support
> virtio migration and ioeventfd rework <--- ioeventfd bits?
> virtio crypto device
> ipmi fixes
>
> Signed-off-by: Michael S. Tsirkin <[email protected]>
Running without the above and everything works no issues. I started to
debug but admittedly got a bit lost in the notifier hooks maybe someone
will have a better idea. Here is the error I get,
> kvm_io_ioeventfd_add: error adding ioeventfd: File exists
> Aborted (core dumped)
I had a gdb backtrace at one point and can post that if its helpful.
Thanks,
John
