What were you trying to do that didn't work?

While trying to reproduce Postcopy live migration issue RHEL-27832, qemu-kvm logged an error saying:

2024-09-05T20:38:41.124872Z qemu-kvm: Fail to update device iotlb
2024-09-05T20:38:41.137950Z qemu-kvm: Fail to update device iotlb

What is the impact of this issue to you?

• It keeps vhost device from starting properly. Which may leads to guest restart via libvirtd(8).

Please provide the package NVR for which the bug is seen:

kernel-5.14.0-426.el9.x86_64
qemu-kvm-8.2.0-6.el9.x86_64
libvirt-10.0.0-4.el9.x86_64

How reproducible is this bug?:

• It requires vhost-user device setup used in the test-case of RHEL-27832.

Expected results

• Handle vhost device start errors properly.

Actual results

• vhost device error is not handled currently.