KVM guest (RHEL) incurs temporary hangs or 'soft lockup' events/panics.

Solution Unverified - Updated -

Issue

A RHEL guest system running in a KVM virtual machine can incur temporary hangs or 'soft lockup' events (including panics) if the guest uses the SPICE virtual graphics device. Example output of lspci command:

00:02.0 VGA compatible controller: Red Hat, Inc. Device 0100 (rev 03)

Environment

  • Red Hat Enterprise Linux 6.3 based RHEV-H hypervisor
  • Red Hat Enterprise Linux 6.3 x86_64 guest
  • xorg-x11-drv-qxl package version 0.0.14-13.el6_2

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