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13.3. Troubleshooting SR-IOV
This section contains solutions for problems which may affect SR-IOV.
- Error starting the guest
- When starting a configured virtual machine, an error occurs as follows:
Copy to Clipboard Copied! Toggle word wrap Toggle overflow This error is often caused by a device that is already assigned to another guest or to the host itself. - Error migrating, saving, or dumping the guest
- Attempts to migrate and dump the virtual machine cause an error similar to the following:
virsh dump --crash 5 /tmp/vmcore
# virsh dump --crash 5 /tmp/vmcore error: Failed to core dump domain 5 to /tmp/vmcore error: internal error unable to execute QEMU command 'migrate': An undefined error has occurredCopy to Clipboard Copied! Toggle word wrap Toggle overflow Because device assignment uses hardware on the specific host where the virtual machine was started, guest migration and save are not supported when device assignment is in use. Currently, the same limitation also applies to core-dumping a guest; this may change in the future.
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