After pass through the MDEV device to the guest, - the first enabling WQ will be ok - Then disabling the WQ is also ok - but failed if re-enable the WQ #accel-config config-wq --type=user --name="app1" -d user dsa0/wq0.0 #accel-config enable-wq dsa0/wq0.0 #1 -> ok #accel-config disable-wq dsa0/wq0.0 #accel-config enable-wq dsa0/wq0.0 #2 -> failed