Unfair CPU possession by a qemu-kvm task; RHEL5 guests on a RHEL6 host

Solution Unverified - Updated -


  • When running RHEL5 KVM guests on a RHEL6 host, some guests sometimes experience "Soft lockup" error messages
  • Guests eventually resume normal operation without intervention


  • Red Hat Enterprise Linux 6.1 & 6.2
  • Kernel versions prior to kernel-2.6.32-220.2.1.el6
  • Running RHEL5 guests under KVM

Subscriber exclusive content

A Red Hat subscription provides unlimited access to our knowledgebase of over 48,000 articles and solutions.

Current Customers and Partners

Log in for full access

Log In