The crashkernel=auto option is deprecated and no longer supported on Oracle Linux 9 and is also unsupported for UEK R7. Some platforms, such as the Raspberry Pi have maximum limits for crashkernel memory reservation and these must be specified explicitly. This option will be removed in a future UEK release.

Asynchronous Transfer Mode (ATM) encapsulation enables Layer-2 (Point-to-Point Protocol, Ethernet) or Layer-3 (IP) connectivity for the ATM Adaptation Layer 5 (AAL-5). Currently, these protocols are used only in chipsets that use ADSL technology, which are being phased out.

The kexec_load system call for kexec-tools is deprecated.

The kexec_file_load system call replaces kexec_load and is the default system call.

cgroupsv1 is deprecated in Oracle Linux 9 in favor of cgroupsv2. See Oracle Linux 9: Managing the System With systemd and Oracle Linux 9: Managing Kernels and System Boot for more information on using cgroups.