3.11 Technology Preview

Features that are currently under technology preview when using UEK R4U6 are described in Unbreakable Enterprise Kernel: Release Notes for Unbreakable Enterprise Kernel Release 4 Update 6.

For RHCK, the following features are currently under technology preview:

  • Systemd: Importd features for container image imports and exports.

  • File Systems:

    • Block and object storage layouts for parallel NFS (pNFS).

    • DAX (Direct Access) for direct persistent memory mapping from an application. This is under technical preview for the ext4 and XFS file systems.

    • ima-evm-utils package, which provides utilities for labeling file systems and verifying the integrity of the system at run time.

    • OverlayFS remains in technical preview.

    • SCSI layout for parallel NFS (pNFS), including support for both client and server configurations.

  • Kernel:

    • Heterogeneous memory management (HMM).

    • No-IOMMU mode virtual I/O feature.

  • Networking:

    • Cisco VIC InfiniBand kernel driver that provides similar functionality to RDMA on proprietary Cisco architectures.

    • nftables and libnftnl network filtering and classification functionality.

    • Single-Root I/O virtualization (SR-IOV) in the qlcnic driver.

    • Support for a Cisco proprietary User Space Network Interface Controller in UCM servers provided in the libusnic_verbs driver.

    • Trusted Network Connect support.

  • Storage:

    • Multi-queue I/O scheduling for SCSI (scsi-mq). This functionality is disabled by default.

    • Plug-in for the libStorageMgmt API used for storage array management. The libStorageMgmt API is now fully supported, but the plug-in is under technology preview.

You can find additional information about technology preview items that are in this release at http://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/7.5_release_notes/technology-previews.