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Reiser

Reiser4 Brought To The Linux 5.0 Kernel

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Reiser

For those still using the out-of-tree Reiser4 file-system, it may be about time to consider alternatives like Btrfs, XFS, ZFS On Linux, F2FS, or even the likes of Stratis and Bcachefs. But should you still be using this once promising file-system, the out-of-tree patches have been revised to now work with the Linux 5.0 kernel.

There still is no trajectory for Reiser4 to the mainline Linux kernel with no major companies or other stakeholders backing Reiser4 but just a small group of developers and enthusiasts left working on this successor to ReiserFS. With the latest code posted on Friday by former Namesys developer Edward Shishkin, the Reiser4 kernel driver has been re-based to the Linux 5.0 kernel but with no other changes to the file-system noted.

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Reiser4 File-System Benchmarks With Linux 4.17

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Linux
Reiser

It's been about three years since last carrying out any file-system performance benchmarks of Reiser4, but being curious how it stacks up against the current state of today's mainline Linux file-systems, here are some fresh performance tests of Reiser4 using the Linux 4.17 kernel. The Reiser4 performance was compared to Reiserfs, EXT4, Btrfs, XFS, and F2FS.

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Reiser4 Updated For Linux 4.14 & Introduces Zstd Compression Support

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The out-of-tree Reiser4 file-system driver has been updated with compatibility for the latest Linux 4.14 stable series. Besides reworking the code to run on Linux 4.14, this controversial file-system has also added support for Zstd file-system compression.

Linux 4.14 introduced Zstd support in the mainline kernel and wired it in for SquashFS and Btrfs. Our Btrfs Zstd benchmarks have been promising for transparent file-system compression compared to the other supported algorithms. Reiser4 has now picked up Zstd compression as an eventual replacement to their Gzip compression support.

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Reiser4 Is Now Ready For Linux 4.13

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For those wanting to use the Reiser4 file-system with the just-released Linux 4.13 kernel, patches are already available.

Less than one week after the release of the Linux 4.13 stable kernel, Edward Shishkin has already released an updated patch for the out-of-tree Reiser4 file-system for working with this new stable series.

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Reiser4 Updated For Linux 4.12, Experimental Data Striping Support

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Those using the Reiser4 file-system in some capacity can now safely upgrade to the Linux 4.12 kernel.

Edward Shishkin has updated this out-of-tree file-system for the Linux 4.12 kernel so it can be built with the latest mainline stable release.

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Reiser4 Updated For The Linux 4.10 Kernel

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The out-of-tree Reiser4 file-system has been updated for the Linux 4.10 kernel.

Reiser4 for the Linux 4.10.0 kernel is available as of earlier this week, managing to release their updated file-system driver code quite promptly. This port to Linux 4.10 yielded a few changes to the Reiser4 code as they re-based to this Linux kernel with the ->readlink() of inode operations being removed as well as the WRITE_FLUSH_FUA flag being removed.

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Reiser4 Is Now Available For Linux 4.9, Mirror Code Almost Stable

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Reiser

For those that haven't yet switched to Btrfs, ZFS On Linux, or running EXT4/XFS but holding out hope for Reiser4, this out-of-tree file-system code has been updated for Linux 4.9.

Reiser4 was released for Linux 4.9.0 last weekend but then a revised patch series came out three days ago to fix some problems with this port to 4.9. With the new Reiser4 patches built against Linux 4.9.1, all should be well if you want to use this experimental file-system on the newest Linux kernel.

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Reiser4 Now Available For Linux 4.8 Kernel

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While Linux 4.9 will be released in just a few weeks, the remaining Reiser4 file-system developers have just updated their code to support the Linux 4.8 stable kernel.

Reiser4 for Linux 4.8.0 is now available for those wanting to run this out-of-tree file-system on the current stable kernel. The Reiser4 kernel is now compatible with 4.8 and there is also a kernel oops fix when mounting forward-incompatible volumes, unneeded assertions were removed, some VFS changes were made, and there is now rename2 support.

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Reiser4 Implements Mirror & Failover Support

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Edward Shishkin, one of the last remaining Reiser4 developers and the one who has been leading this out-of-tree file-system the past few years, has implemented logical volumes support with support for mirrors (in effect, RAID 0) and failover support at the file-system level.

Shishkin quietly announced on Sunday, "Reiser4 will support logical (compound) volumes. For now we have implemented the simplest ones - mirrors. As a supplement to existing checksums it will provide a failover - an important feature, which will reduce number of cases when your volume needs to be repaired by fsck."

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Reiser4 Now Has Support For The Linux 4.7 Kernel

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The Reiser4 file-system now has support for the latest stable Linux kernel series, Linux 4.7.

Released this morning by Edward Shishkin was the updated Reiser4 file-system driver patch that provides compatibility for Linux 4.7.0. The only other change besides porting over to Linux 4.7 is a small returned optimization.

There's been no talk in a few years about attempting to mainline the Reiser4 file-system in the Linux kernel. Thus for now if you want to try out this once-promising file-system, swing by SourceForge to patch your kernel.

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More in Tux Machines

Linux Devices/Open Hardware

  • Site.js and Pi

    Chatting about Pi, on a Pi, with a chat server running on Site.js on the same Pi.

  • This MicroATX Motherboard is Based on Phytium FT2000/4 Arm Desktop SoC @ 3.0 GHz
  • Rikomagic R6 Review – Part 1: Android Mini Projector’s Unboxing and First Boot

    Rikomagic R6 is a mini Android projector that looks like a vintage radio, or depending on your point of view a mini vintage television.

  • Brief on Behalf of Amicus Curiae Open Source Hardware Association in Curver Luxembourg, SARL v. Home Expressions Inc., No. 18-2214 (Fed. Cir.)

    Curver Luxembourg, SARL v. Home Expressions Inc. is a case of first impression for the Court of Appeals for the Federal Circuit. The question on appeal is whether a design patent’s scope is tied to the article of manufacture disclosed in the patent. In this amicus brief, the Open Source Hardware Association (“OSHWA”) explains the potential effects on open source hardware development, and design practice generally, of untethering design patent protection from the article of manufacture disclosed in the patent. A large percentage of open-source hardware combines both ornamental and functional elements, and industrial design routinely involves applying design concepts from disparate fields in novel ways. To engage in this practice, open-source hardware designers need to know the universe of available source material and its limits. Further, understanding the licensing requirements of open-source hardware begins with understanding how the elements that make up that hardware may or may not be protected by existing law. Accordingly, while many creators of open-source hardware do not seek patent protection for their own creations, an understandable scope of design patent protection is nonetheless essential to their ability to collaborate with other innovators and innovate lawfully. The brief argues that the District Court in the case—and every district court that has considered the issue—correctly anchored the patented design to the article of manufacture when construing the patent. The brief explains that anchoring the patented design to the disclosed article of manufacture is the best approach, for several reasons. Connecting the patented design to the disclosed article of manufacture calibrates the scope of design patent protection to the patentee’s contribution over the prior art. It avoids encumbering the novel and nonobvious application of prior designs to new articles of manufacture, a fundamental and inventive practice of industrial design. It aligns the scope of design patent protection with its purpose: encouraging the inventive application of a design to an article of manufacture. This balances protection for innovative designs with later innovators’ interest in developing future designs. Finally, anchoring the patented design to the disclosed article of manufacture helps fulfill design patent law’s notice function by clarifying the scope of protection.

Graphics: Gallium3D and AMDGPU

  • Gallium3D's Mesa State Tracker Sees "Mega Cleanup" For NIR In Mesa 19.3

    AMD developer Marek Olšák has landed a "mega cleanup" to the Gallium3D Mesa state tracker code around its NIR intermediate representation handling. As part of getting the NIR support in good enough shape for default usage by the RadeonSI driver, Marek has been working on a number of clean-ups involving the common Gallium / Mesa state tracker code for NIR.

  • AMDGPU DC Looks To Have PSR Squared Away - Power-Savings For Newer AMD Laptops

    It looks like as soon as Linux 5.5 is where the AMDGPU kernel driver could be ready with Panel Self Refresh (PSR) support for enabling this power-savings feature on newer AMD laptops. While Intel's Linux driver stack has been supporting Panel Self Refresh for years, the AMD support in their open-source Linux driver code has been a long time coming. We've seen them working towards the support since Raven Ridge and now it appears the groundwork has been laid and they are ready to flip it on within the Display Core "DC" code.

today's howtos and programming bits

  • CentOS 8 Package Management with DNF on the Command Line
  • AdamW’s Debugging Adventures: “dnf is locked by another application”
  • Managing user accounts with Cockpit
  • Download Ubuntu 19.10 ISO image to install on VirtualBox VM
  • GNU poke: Dealing with alternatives - Unions in Poke

    Computing with data whose form is not the most convenient way to be manipulated, like is often the case in unstructured binary data, requires performing a preliminary step that transforms the data into a more convenient representation, usually featuring a higher level of abstraction. This step is known in computer jargon as unmarshalling, when the data is fetch from some storage or transmission media or, more generally, decoding. Once the computation has been performed, the result should be transformed back to the low-level representation to be stored or transmitted. This is performed in a closing step known as marshalling or, more generally, encoding. Consider the following C program whose purpose is to read a 32-bit signed integer from a byte-oriented storage media at a given offset, multiply it by two, and store the result at the same offset.

  • Android NDK r21 moves to beta

    Android announced that NDK r21 is now in beta. Android NDK is a toolset for implementing parts of an app in native code. The release — which is the first long term support release — includes improved defaults for better security and performance. One of the key features in the release is an update to GNU Make to version 4.2, which provides a number of bug fixes, and enables ‘–output-sync’ to avoid interleaving output with error messages, the team explained. This is enabled by default with ndk-build. Additionally, GDB, the GNU project debugger, has been updated to version 8.3, which includes fixes for debugging modern Intel CPUs.

  • What is the history behind C Programming and Unix?

    If you think C programming and Unix are unrelated, then you are making a big mistake. Back in the 1970s and 1980s, if the Unix engineers at Bell Labs had decided to use another programming language instead of C to develop a new version of Unix, then we would be talking about that language today. The relationship between the two is simple; Unix is the first operating system that is implemented with a high-level C programming language, got its fame and power from Unix. Of course, our statement about C being a high-level programming language is not true in today’s world. This article is an excerpt from the book Extreme C by Kamran Amini. Kamran teaches you to use C’s power. Apply object-oriented design principles to your procedural C code. You will gain new insight into algorithm design, functions, and structures. You’ll also understand how C works with UNIX, how to implement OO principles in C, and what multiprocessing is.

Server: Mirantis, Containers, GraalVM and Pensando

  • Mirantis Partners With OpenStack Foundation to Support Upgraded COA Exam

    “With the OpenStack market forecasted to grow to $7.7 billion by 2022 according to 451 research, the demand for Certified OpenStack Administrators is clearly strong and set to continue growing for many years to come,” said Mark Collier, COO of the OpenStack Foundation. “We are excited to collaborate with Mirantis, who has stepped up to provide the resources needed to manage the COA, including the administration of the vendor-neutral OpenStack certification exam.”

  • How to use containers with an eye on security

    Containers are all the rage. With good reason. With containers, your company’s apps and service deployments become considerably more agile, more reliable, and even more secure. This is true for software development companies (who develop apps and services for other businesses), as well as companies looking to roll out web-based and mobile applications with an unheard of speed and reliability. But with any new technology, comes hurdles. One of the biggest hurdles for any business is security. Data breaches have become rampant and it’s on the shoulders of every company to do everything in their power to make sure they are rolling out technology that is as secure as possible. This idea should certainly be applied to containers. But what can you do to use containers security? Fortunately, there are a few steps that you can take from the very beginning.

  • GraalVM: Clearing up confusion around the term and why Twitter uses it in production

    What does the “umbrella term” GraalVM stand for? We interviewed Chris Thalinger (Twitter) at JAX London 2019. Hear what he has to say about the meaning of Graal and how it can benefit Twitter as well as the environment.

  • Pensando Systems Exits Stealth Mode With Plans To Take On Amazon AWS

    While normally we don't cover hardware start-ups on Phoronix, Pensando Systems has just exited stealth and given their focus will be heavily involved with Linux and in fact already have their first kernel driver mainlined. After announcing a $145 million (USD) Series-C round, Pensando Systems exited "stealth" and revealed the first details of what they are trying to achieve with this company led by many ex-Cisco staff. [...] Pensando has been on our radar since as I wrote about last month when they were just a stealth networking startup they already upstreamed their first Linux kernel driver. In the Linux 5.4 kernel is a Pensando "Ionic" driver for a family of network adapters. In this week's press release, Pensando didn't specifically call out Ionic but presumably is the backbone to their hardware. Now that they are beginning to talk about their ambitions, hopefully we see more Linux kernel patches from them soon.