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Kernel: Security, Compression, and Software Defined Silicon (SDSi)

Submitted by Roy Schestowitz on Wednesday 29th of September 2021 10:34:07 PM Filed under
Linux
  • A kernel of truth: Linux isn't as foolproof as we may have thought - ManageEngine Blog

    A world without Linux is hard to imagine. Every Google search we run is accomplished on Linux-based servers. Behind the Kindle we enjoy reading, to the social media sites we spend scrolling away every day sits the Linux kernel. Would you believe your ears if I tell you the world’s top 500 supercomputers run on Linux? No wonder Linux has permeated into every aspect of the digital age, not to mention its steadily growing enterprise user base.

    It may be true that Linux makes up only 9% of total enterprise operating systems, but don’t let the numbers fool you; the most high-value systems, including web servers, routers, and contingency machines are often trusted with Linux. One could see why, considering the global consensus on Linux being the most secure OS.

  • Updated Zstd Implementation For The Linux Kernel Coming Soon - Phoronix

    While the Linux kernel is increasingly supporting the use of Zstd for various compression purposes, the current Zstd code within the kernel is out-of-date and efforts so far to re-base it against the closer to upstream Zstd state have been stalled. Fortunately, a new attempt at getting the Zstd code updated for the Linux kernel will be published soon.

    There has been Linux kernel work to support Zstd compressed modules, Zstd compressed firmware, Zstd'ed kernel image, and work like Btrfs Zstd file-system compression. Zstandard is increasingly used throughout the open-source ecosystem for its speedy decompression capabilities and overall great design and performance.

  • Intel Preps Software Defined Xeon CPUs: Buy Now, Add Features Later

    Intel has published a patch (discovered by Phoronix) that enables support for its Intel Software Defined Silicon (SDSi) mechanism in Linux. The technology is meant for upcoming Intel Xeon processors and is designed to activate additional silicon features after a processor has been deployed.

    The patch does not mention any specific features it is meant to unlock or any specific Xeon Scalable processors it is meant to upgrade (we think Sapphire Rapids), yet it gives some general understanding how it is supposed to work. As it turns out, the whole process is purely software, so it does not require any manipulations with hardware. Therefore, it can be done relatively easily.

    Intel's SDSi initiative seems to be a major one, yet Intel is not new to offering software upgrades to its CPUs. The most recent example of such software upgradeability is Intel's Virtual RAID on CPU (Intel VROC) technology that relies on the Intel Volume Management Device (VMD) hardware built into the CPU and has to be activated using a special hardware key. The company also once offered its Upgrade Service software upgrade capability for its entry-level client CPUs that would increase their clock speed, unlock a previously unused portion of cache, and activate Hyper-Threading technology.

  • Intel’s new patch update brings its SDS mechanism to Linux
»

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