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Kernel: OpenZFS 2.1-rc1, x86-64, and Security

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Linux

  • OpenZFS 2.1-rc1 Released With Distributed Spare RAID "dRAID" - Phoronix

    The first release candidate of the forthcoming OpenZFS 2.1 file-system for Linux and FreeBSD systems is now available for testing. 

    Compared to the OpenZFS 2.0 release at the end of November, OpenZFS 2.1 is a much smaller feature release but still with a few significant changes. 

    First up, OpenZFS 2.1 is bringing a new feature called Distributed Spare RAID (dRAID). OpenZFS' Distributed Spare RAID is described as a "pool configuration [that] allows all dRAID vdevs to participate when rebuilding to a distributed hot spare device. This can substantially reduce the total time required to restore full parity to pool with a failed device." In tests by the developers they found dRAID needed 25% less time to resilver compared to a traditional hot spare. OpenZFS 2.1 will allow a dRAID pool to be created using the new "draid" top-level type. This Distributed Spare RAID feature has been in the works for more than one year. 

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  • Linus Torvalds on Intel And AMDs New Approaches To Interrupt And Exception Handling - And Microkernels

    AMD and Intel are both working on new standards for handling interrupts and exceptions on x86-64 processors. AMD is proposing a set of new "Supervisor Entry" extensions as a band-aid to the current interrupt descriptor table event handling system. Intel wants to throw that whole legacy system away and start over with a fundamentally different "Flexible Return and Event Delivery" (FRED) system. Linux-architect Linus Torvalds weighted in on the merits of both approaches a few weeks ago.

    [...]

    AMD proposes several new processor instructions that would replace the old SYSCALL and SYSRET instructions with new "Enhanced SYSCALL" (ESC) instruction and new "Enhanced SYSRET" behavior when SYSRET is called following a "Enhanced SYSCALL". The "Template:AMD 57115.pdf" document is just 18 pages long, 13 if you discount the "License Agreement" drivel and the front cover on the first five pages. It has some psudo-code illustrating how their new enhanced SYSCALL would work.

  • Patched Linux bugs nix Spectre mitigations

    Two Linux bugs patched this month could allow hackers to sidestep mitigations for the infamous Spectre vulnerability.

    “If left unpatched, the vulnerabilities mean that existing Spectre protections will not be sufficient to prevent some exploitation techniques,” wrote Symantec in a blog post.

    Spectre is a flaw in speculative execution in Intel, ARM and AMD processors that first came to light in 2018. The vulnerability could ultimately reveal the contents of memory.

More in Tux Machines

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Dilution and Misuse of the "Linux" Brand

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today's howtos

  • How to install go1.19beta on Ubuntu 22.04 – NextGenTips

    In this tutorial, we are going to explore how to install go on Ubuntu 22.04 Golang is an open-source programming language that is easy to learn and use. It is built-in concurrency and has a robust standard library. It is reliable, builds fast, and efficient software that scales fast. Its concurrency mechanisms make it easy to write programs that get the most out of multicore and networked machines, while its novel-type systems enable flexible and modular program constructions. Go compiles quickly to machine code and has the convenience of garbage collection and the power of run-time reflection. In this guide, we are going to learn how to install golang 1.19beta on Ubuntu 22.04. Go 1.19beta1 is not yet released. There is so much work in progress with all the documentation.

  • molecule test: failed to connect to bus in systemd container - openQA bites

    Ansible Molecule is a project to help you test your ansible roles. I’m using molecule for automatically testing the ansible roles of geekoops.

  • How To Install MongoDB on AlmaLinux 9 - idroot

    In this tutorial, we will show you how to install MongoDB on AlmaLinux 9. For those of you who didn’t know, MongoDB is a high-performance, highly scalable document-oriented NoSQL database. Unlike in SQL databases where data is stored in rows and columns inside tables, in MongoDB, data is structured in JSON-like format inside records which are referred to as documents. The open-source attribute of MongoDB as a database software makes it an ideal candidate for almost any database-related project. This article assumes you have at least basic knowledge of Linux, know how to use the shell, and most importantly, you host your site on your own VPS. The installation is quite simple and assumes you are running in the root account, if not you may need to add ‘sudo‘ to the commands to get root privileges. I will show you the step-by-step installation of the MongoDB NoSQL database on AlmaLinux 9. You can follow the same instructions for CentOS and Rocky Linux.

  • An introduction (and how-to) to Plugin Loader for the Steam Deck. - Invidious
  • Self-host a Ghost Blog With Traefik

    Ghost is a very popular open-source content management system. Started as an alternative to WordPress and it went on to become an alternative to Substack by focusing on membership and newsletter. The creators of Ghost offer managed Pro hosting but it may not fit everyone's budget. Alternatively, you can self-host it on your own cloud servers. On Linux handbook, we already have a guide on deploying Ghost with Docker in a reverse proxy setup. Instead of Ngnix reverse proxy, you can also use another software called Traefik with Docker. It is a popular open-source cloud-native application proxy, API Gateway, Edge-router, and more. I use Traefik to secure my websites using an SSL certificate obtained from Let's Encrypt. Once deployed, Traefik can automatically manage your certificates and their renewals. In this tutorial, I'll share the necessary steps for deploying a Ghost blog with Docker and Traefik.