Not necessarily;

``` $ grep PREEMPT_DYNAMIC /boot/config-$(uname -r) CONFIG_PREEMPT_DYNAMIC=y CONFIG_HAVE_PREEMPT_DYNAMIC=y CONFIG_HAVE_PREEMPT_DYNAMIC_CALL=y ```

if your kernel has CONFIG_PREEMPT_DYNAMIC then you can go back to the pre 7.0 default by adding preempt=none to your grub config. I haven't seen any plans by Ubuntu to drop CONFIG_PREEMPT_DYNAMIC from the default kernel config.

actually i just checked, yeah, ubuntu would have to add none back to the kernel and `CONFIG_PREEMPT_NONE=y` the config so that it can be selected at boot.