Ubuntu Server
The tables map functions by Linux kernel and Ubuntu version.
Ubuntu 26.04 LTS (Resolute Raccoon)
The functions listed in lddd_r_distro_info_ubuntu.html#tab_distro_info_ub_2604 are included in 26.04. Includes releases 24.10, 25.04, 25.10, and service at the time of writing.
| Name | Description | Chapter |
|---|---|---|
| Cryptography | zcrypt driver overwrite function | Displaying information about cryptographic devices and AP queues |
| In kernel crypto | Disable default use of clear keys by PAES and PHMAC | Support modules |
| In kernel crypto | PHMAC support for MSA 11 HMAC | Support modules |
| System time | Time steering is now done in user space | TOD clock synchronization |
| z/VM DCSS | DAX support for DCSS | Mounting a filesystem on a DCSS with DAX support |
| Tape device driver update | Tape device driver supports only virtual tapes | Channel-attached tape device driver |
| Kernel | Provide topology-map information to userspace | zmemtopo - Display memory topography. |
| Cryptographic command | Obtain CPACF information with the cpacfinfo command | cpacfinfo - Obtain CPACF cryptographic information |
| Promiscuous mode for new VFs | Read a sysfs attribute to check the FID parameter setting. | Configuring FIDPARM to support promiscuous mode on a VF |
| LPAR-level power consumption | View LPAR level power consumption with the zpwrcommand | zpwr - Retrieve power readings |
| IBM z17 introduced | z17 base support | Throughout |
| Channel-path statistics | View channel-path statistics, such as utilization and throughput, with the chpstat command | chpstat - Display channel-path statistics |
| PCI | You can monitor optics for PF access mode. | |
| Vertical CPU polarization | HiperDispatch automatically adjusts capacity values for vertical polarization. You can influence the decision making of HiperDispatch by setting sysfs attributes. | Controlling vertical polarization (HiperDispatch) |
Ubuntu 24.04 LTS (Noble Numbat)
The functions listed in lddd_r_distro_info_ubuntu.html#table_distro_info_ub2404 are included in 24.04. Includes releases 22.10, 23.04 and 23.10, and service at the time of writing.
| Name | Description | Chapter |
|---|---|---|
| Kernel | CPU-MF Counters for z17 | Using the CPU-measurement facilities |
| SMC | The default buffer size is now controlled though the net.smc.[rw]mem attribute. | Setting up the SMC support |
| Memory hotplug | The memory hotplug subsystem provides a dedicated namespace for module parameters. | Module parameters |
| DASD | You can now control the DASD autoquiesce feature with new sysfs attributes. | |
| DASD | The DASD device driver can now handle devices with copy-pair relations. | Working with DASDs in a copy-pair relation |
| NETD PCI function support | Includes support for direct use of PCI physical functions for NETD type network devices (for example, Network Express). |