{"id":104606,"date":"2022-07-06T09:36:42","date_gmt":"2022-07-06T07:36:42","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/dostupny-oracle-linux-9-i-yadro-unbreakable-enterprise-kernel-7"},"modified":"2022-07-06T09:36:42","modified_gmt":"2022-07-06T07:36:42","slug":"dostupny-oracle-linux-9-i-yadro-unbreakable-enterprise-kernel-7","status":"publish","type":"post","link":"https:\/\/prohoster.info\/en\/blog\/news\/dostupny-oracle-linux-9-i-yadro-unbreakable-enterprise-kernel-7","title":{"rendered":"Oracle Linux 9 and Unbreakable Enterprise Kernel 7 are now available.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"
Oracle has released stable versions of the Oracle Linux 9 distribution and the Unbreakable Enterprise Kernel 7 (UEK R7), aimed at providing an alternative to the default kernel package from Red Hat Enterprise Linux. Oracle Linux 9 is based on the package foundation of Red Hat Enterprise Linux 9 and is fully binary compatible with it. <\/p>\n
Installation ISO images of 8.6 GB and 840 MB are available for download without restrictions, prepared for the x86_64 and ARM64 (aarch64) architectures. Oracle Linux 9 offers unlimited and free access to a yum repository with binary updates for packages addressing errors (errata) and security issues. Additionally, separate supported repositories for Application Stream and CodeReady Builder package sets have been prepared for download. <\/p>\n
In addition to the kernel package from RHEL (based on kernel 5.14), Oracle Linux offers its own Unbreakable Enterprise Kernel 7, based on Linux kernel 5.15 and optimized for use with Oracle's industrial software and hardware. The source code of the kernel, including separate patch breakdowns, is available in Oracle's public Git repository. The Unbreakable Enterprise Kernel is installed by default, positioned as an alternative to the RHEL kernel package, and provides a range of enhanced features, such as DTrace integration and improved Btrfs support. Besides the additional kernel, the releases of Oracle Linux 9 and RHEL 9 are completely identical in functionality (the change log can be viewed in the RHEL9 announcement). <\/p>\n
Key innovations in the Unbreakable Enterprise Kernel 7 include: <\/p>\n
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Improved support for the Aarch64 architecture. The default memory page size for 64-bit ARM systems has been reduced from 64 KB to 4 KB, which better aligns with the memory volumes and workloads typical for ARM systems.\n
The delivery of DTrace 2.0 dynamic debugging system has continued, which has been transitioned to use the eBPF kernel subsystem. DTrace 2.0 operates on top of eBPF, similar to how existing tracing tools in Linux operate with eBPF.\n
The capabilities of the Btrfs filesystem have been expanded. An asynchronous implementation of the DISCARD operation has been added to Btrfs to mark freed blocks that no longer need to be physically stored. This asynchronous implementation allows the storage device not to wait for the completion of DISCARD and to perform this operation in the background. New mounting options have been introduced to simplify data recovery from corrupted filesystems: 'rescue=ignorebadroots' to mount despite the damage of some root trees (extent, uuid, data reloc, device, csum, free space), 'rescue=ignoredatacsums' to disable checksum checking for data, and 'rescue=all' to simultaneously enable the 'ignorebadroots', 'ignoredatacsums', and 'nologreplay' modes. Significant performance optimizations related to the execution of fsync() operations have been made. Support for fs-verity (file authenticity and integrity verification) and user ID matching has been added.\n
XFS now supports DAX operations for direct filesystem access bypassing the page cache to avoid double caching. Changes have been implemented to address the 32-bit time_t overflow issue in 2038, including the introduction of new mount options bigtime and inobtcount.\n
Improvements have been made to the OCFS2 (Oracle Cluster File System).\n
A new filesystem, ZoneFS, has been added to facilitate low-level operations with zoned storage devices. Zoned storage refers to devices on hard magnetic disks or NVMe SSDs where the storage space is divided into zones that consist of groups of blocks or sectors, allowing only sequential data additions with complete updates to the entire block group. The ZoneFS filesystem links each zone on the storage device to a separate file that can be used for raw data storage without manipulating on the sector and block level, allowing applications to use the file API instead of directly accessing the block device via ioctl.\n