Error while migrating VM "libvirtError: cannot fork child process: Cannot allocate memory" on RHV.

Solution In Progress - Updated -


  • While migrating VM from one host to another migration is getting failed.
  • On source hypervisor memory utilization is 100%, to free up a memory need to migrate VMs to another host.
  • There is enough free memory available on the destination but still VM migration is getting failed.


  • Red Hat Virtualization 4.x

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