qemu-kvm guests panic due to hung task time-out caused by a missing memory barrier in QEMU's AIO code

Solution In Progress - Updated -

Issue

  • qemu-kvm guests panic due to hung task time-out.
  • Guests do not restart after the panic.
  • virsh dump initiated on the hypervisor after the panic, does not complete.

Environment

  • Red Hat Enterprise Linux.
  • Red Hat OpenStack Platform.
  • Red Hat Enterprise Virtualisation.
  • qemu-kvm-rhev-2.1.2-23.el7_1.9.x86_64

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