libvirtd frequently hangs when sriov interface undergo bind / unbind
Issue
- When an VF on Intel 82576 is assigned to a guest, on unbinding PF's, the guest has to release it's associated VF's.
- Same symptom has trying to remove igbvf on host.
Environment
- Red Hat OpenStack Platform (RHOS)
- Virtualization using SRIOV Virtual Functions
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