libvirtd frequently hangs when sriov interface undergo bind / unbind

Solution In Progress - Updated -

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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