Table of Contents
KVM Cheat Sheet
List of VMs
virsh list
Errors
Requested operation is not valid: cannot resize the maximum memory on an active domain
To increase the memory size:
virsh setmaxmem <vm_name> <memsize> --config virsh setmem <vm_name> <memsize> --config
For online configuration:
You can set the vCPU and memory while the VM is running with --current instead of --config, but the new numbers has to be within the maximum values already set. You can not set these maximum numbers while the VM is running. You will have to shutdown the VM with virsh shutdown <vm_name>, use the above command and start back the VM with virsh start <vm_name>.
Enable shared memory greyed out
Specify if the virtual machine can use shared memory via the memfd backed. It is a requirement for using the virtiofs file system. Find more details in https://libvirt.org/kbase/virtiofs.html.
References
https://documentation.suse.com/sles/15-SP4/html/SLES-all/cha-libvirt-config-gui.html