Deprecated and Removed Features

The following features are deprecated or no longer available in: UEK R7U3:

• CONFIG_RPCSEC_GSS_KRB5_ENCTYPES_DES option for 3DES/DES3 RPCSEC GSS encryption types

  The RPCSEC GSS encryption types DES and Triple-DES (3DES/DES3) are deprecated in this UEK release, and might be removed from the kernel in a future UEK release.

  These encryption types were deprecated by RFCs 6649 and 8429 because they're known to be insecure.

• CONFIG_NFS_V2 and CONFIG_NFSD_V2 options for NFSv2 client and server

  Support for NFSv2 clients and NFSv2 servers is deprecated in this UEK release, and might be removed from the kernel in a future UEK release.

  NFSv2 has long been replaced by NFSv3 and NFSv4, which offer improved functionality, performance, and security.

• CONFIG_NFS_DISABLE_UDP_SUPPORT option for NFSv3 over UDP

  Support for NFS version 3 over the UDP network protocol is deprecated in this UEK release, and might be removed from the kernel in a future UEK release.

  Modern NFS/RPC over TCP and RDMA implementations provide better performance than UDP, and provide reliable ordered delivery of data combined with congestion control.

  Note that NFSv4 is already not supported over UDP, for the same reasons.

• CONFIG_STAGING option

  With the CONFIG_STAGING kernel configuration option, you can select drivers that don't necessarily meet the highest kernel quality level but are merely made available for test use. However, the kernel option CONFIG_STAGING is deprecated in this UEK release and might be removed in a future release.

• CONFIG_IXGB option

  The CONFIG_IXGB for Intel PRO/10GbE hardware is deprecated and might be removed from the kernel in a future UEK release.

• CONFIG_IP_NF_TARGET_CLUSTERIP option

  The CONFIG_IP_NF_TARGET_CLUSTERIP option that allowed you to build load-balancing clusters of network servers without a dedicated load-balancing router or switch is deprecated in favor of functionality already in Netfilter cluster match.

• CONFIG_EFI_VARS option

  The CONFIG_EFI_VARS option that provided the efivars sysfs interface to configure UEFI variables is removed from the upstream kernel and is deprecated in this release of UEK. Replacement functionality has been present in the kernel since 2012. For more information, see https://www.kernel.org/doc/html/latest/filesystems/efivarfs.html.

• Firewire driver

  The CONFIG_FIREWIRE option was disabled in Oracle Linux 9. Thus, the Firewire driver is deprecated and unusable in this UEK release.

• crashkernel=auto option

  The crashkernel=auto option is deprecated and no longer supported on Oracle Linux 9 and therefore unsupported for UEK R7 on Oracle Linux 9. 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.

• Several network scheduler modules

  The following network scheduler modules are deprecated:

  • cls_tcindex
  • cls_rsvp
  • sch_dsmark
  • sch_atm
  • sch_cbq

  These modules might be disabled or blocklisted and can be removed in a future release of UEK. The modules are already removed in the upstream Linux kernel.