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Kernel: Speck, XArray, Dhyana, New Release and New Features

Submitted by Roy Schestowitz on Wednesday 24th of October 2018 05:49:58 AM Filed under
Linux
  • The Linux Kernel's Speck Death Sentence Finally Being Carried Out

    Earlier this year the Speck encryption algorithm was added to the Linux kernel as at the time Google intended to use it for EXT4/fscrypt file-system encryption with low-end Android devices. But Speck with all its controversy due to being developed by the US National Security Agency (NSA) led to immediate backlash. The removal of Speck from the Linux kernel tree is finally happening.

    Google decided in August they wouldn't use Speck as planned but rather work on the new HPolyC crypto code for use in future Android Go devices. Following that was the call to remove Speck from the Linux kernel with no real users of the code, but that didn't happen for the Linux 4.19 cycle.

  • XArray Tries Once Again To Get Merged Into The Mainline Linux Kernel

    XArray as a reminder is intended to eventually replace the radix tree data structure within the Linux kernel as this new "eXtensible Array" integrates locking capabilities into its design, offers page cache improvements, doesn't require memory pre-loading, and offers other benefits to suit the current usage of the radix tree within the Linux kernel.

  • The AMD Zen-Based Hygon Dhyana CPU Support Landing In The Mainline Linux Kernel

    Hygon's Dhyana SoC, the facsimile of the AMD Zen microarchitecture as a result of the AMD-Chinese joint venture to begin spinning up domestic x86 chips for the Chinese data center market, will be supported by the next version of the Linux kernel.

    Going back a number of months I have been writing about the Linux kernel patches for Hygon Dhyana that effectively amount to copying the AMD Zen code-paths within the Linux kernel to use them as well for this x86 Chinese server SoC based on EPYC. After several rounds of patch revisions, that code is into shape and is now making its maiden voyage to the Linux kernel.

  • Linux Kernel 4.19 Released with Initial Wi-Fi 6 Support, New EROFS File System

    Renowned kernel maintainer Greg Kroah-Hartman announced the release and general availability for download of the Linux 4.19 kernel, a major update that adds new features and performance improvements.

    After almost two months of development and no less than eight RCs (Release Candidates), the Linux 4.19 kernel series is now available as the most advanced kernel on the market for Linux-based operating systems. It was released by Greg Kroah-Hartman as Linus Torvalds two a few weeks off from doing any kernel maintenance.

  • Linux Kernel 4.19 LTS Release is Here!

    If you’ve been waiting for a stable (and longterm) Kernel release now, Kernel 4.19 is here. As mentioned on the Linux Kernel’s mailing list webpage, it is not a big Kernel release – but it is meant to be a longterm release. Which means that this release will be supported for a few years at least.

  • Linux Lands Xbox One S Controller Rumbling, Logitech High Resolution, Apple Trackpad 2

    The HID driver updates have a few nice improvements for the recently opened Linux 4.20~5.0 kernel merge window.

  • Google Developing "DM-BOW" For Using Drive's Free Space For Data Snapshots

    Google engineers are developing the DM-BOW device mapper driver with plans to use the code on Android devices to provide a restoration path should a system upgrade fail.

    The Device Mapper BOW driver in this context is short for "Backup On Write." With the EXT4 file-system commonly used by Android devices not offering native snapshot abilities for backup/restoration, DM-BOW sits underneath to provide snapshots and restore support.

    [...]

    A working prototype of this new Linux kernel driver was posted today on the kernel mailing list. At this stage it's under a "request for comments" flag and thus not being called for inclusion into the mainline kernel until the code has matured. It will be interesting to see how quickly Google rolls this out with future Android updates.

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