Linux Archive

After ten weeks of development Linus Torvalds has announced the release of Linux kernel 3.9. The latest version of the kernel now has a device mapper target which allows a user to setup an SSD as a cache for hard disks to boost disk performance under load. There's also kernel support for multiple processes waiting for requests on the same port, a feature which will allow it to distribute server work better across multiple CPU cores. KVM virtualisation is now available on ARM processors and RAID 5 and 6 support has been added to Btrfs's existing RAID 0 and 1 handling. Linux 3.9 also has a number of new and improved drivers which means the kernel now supports the graphics cores in AMD's next generation of APUs and also works with the high-speed 802.11ac Wi-Fi chips which will likely appear in Intel's next mobile platform. Read more about new features in What's new in Linux 3.9.

"Today the ZFS on Linux project reached an important milestone with the official 0.6.1 release! Over two years of use by real users has convinced us ZoL is ready for wide scale deployment on everything from desktops to super computers."

In a recent EE Times 2013 Embedded Market study, Android was the OS of choice for future embedded projects among 16 percent of the survey's participants, second only to 'in-house/custom' (at 28 percent). But if a spectrum of disparate approaches can be lumped together as a single option, why not aggregate the various shades of Linux to see how they compare? "Parsing the EE Times data this way makes it abundantly clear that Linux truly dominates the embedded market."

Linux kernel 3.8 has been released. This release includes support in Ext4 for embedding very small files in the inode, which greatly improves the performance for these files and saves some disk space. There is also a new Btrfs feature that allows to replace quickly a disk, a new filesystem F2FS optimized for SSDs, support of filesystem mount, UTS, IPC, PID, and network namespaces for unprivileged users, accounting of kernel memory in the memory resource controller, journal checksums in XFS, an improved NUMA policy redesign and, of course, the removal of support for 386 processors. Many small features and new drivers and fixes are also available. Here's the full list of changes.

"Both of these articles allude to the fact that I'm working on putting the D-Bus protocol into the kernel, in order to help achieve these larger goals of proper IPC for applications. And I'd like to confirm that yes, this is true, but it's not going to be D-Bus like you know it today. Our goal (and I use 'goal' in a very rough term, I have 8 pages of scribbled notes describing what we want to try to implement here), is to provide a reliable multicast and point-to-point messaging system for the kernel, that will work quickly and securely. On top of this kernel feature, we will try to provide a 'libdbus' interface that allows existing D-Bus users to work without ever knowing the D-Bus daemon was replaced on their system."

After about a year of work, the ArchLinux distribution now offers a variant running on the FreeBSD kernel. Says the developer, "Why would I do this? If like me, you enjoy FreeBSD and love it, but also like the philosophy behind Arch Linux, which is a fast, lightweight, optimized distro, I figured why not combine the both. Even though you could just do it on FreeBSD using the ports, not everyone wants to compile." This now puts Arch in the same category as Debian with Debian GNU/KFreeBSD, which offers a Debian userland on top of a FreeBSD kernel.

"BORPH is an operating system designed for FPGA-based reconfigurable computers. It is an extended version of the Linux kernel that handles FPGAs as if they were CPUs. BORPH introduces the concept of a 'hardware process', which is a hardware design that runs on an FPGA but behaves just like a normal user program. The BORPH kernel provides standard system services, such as file system access to hardware processes, allowing them to communicate with the rest of the system easily and systematically. The name is an acronym for 'Berkeley Operating system for ReProgrammable Hardware'."

"Ubuntu, once the darling of desktop Linux and the overwhelmingly popular choice for newcomers, may soon lose that role to Mint." I switched to Mint KDE, and have no intention of going back. By the way, KDE4 is finally good (don't hit me, Aaron) - fast, fluid, stable, pretty, and thanks to its versatility, a joy to use after a few hours of tweaking. Just... Please, unify Plasma and the regular widget style. This is insanity.

With Enlightment 0.17 released, it's no surprise the Linux distribution that uses E17 for its desktop is rushing to release a new version that uses it. Look for Bodhi 2.2.0 in January, featuring the stable E17 desktop. If you've never experienced it, Bodhi is a Ubuntu derivative, and it offers more configurabality than you can imagine. Have you been complaining about Unity and Gnome3 taking away your options? Bodhi and E17 bring them back - and many more, too.

It's sad that we need this, but alas - Matthew Garret has made a list of Linux distributions that boot on Windows 8 PCs with Secure Boot enabled. Tellingly enough, the list is short. Very short. Can someone hack this nonsense into oblivion please?

Linux kernel 3.7 has been released. This release includes support for the new ARM 64 bit architecture, ARM multiplatform support - the ability to boot into different ARM systems using the same kernel; support for cryptographically signed kernel modules; Btrfs support for disabling copy-on-write on a per-file basis using chattr; faster Btrfs fsync(); a new experimental "perf trace" tool modeled after strace; support for the TCP Fast Open feature in the server side; experimental SMBv2 protocol support used by modern Windows systems; stable NFS 4.1 and parallel NFS; the vxlan tunneling protocol that allows to transfer Layer 2 ethernet packets over UDP; and support for the Intel "supervisor mode access prevention" security feature. Many small features and new drivers and fixes are also available. Here's the full list of changes.

Software for the Raspberry Pi is quickly moving forward. Beyond the several core Linux distros, another couple dozen systems are available, with NetBSD, FreeBSD, and Chromium imminently stepping into the mix. (Ubuntu will not join them as it requires ARMv7 and the Pi is ARMv6). Two dozen programming languages are available, including Python, Perl, Java, Ruby 1.9.2, BASIC, and more. Since the Pi is a full fledged ARM computer, it should run nearly any ARM app within its system requirements. See the RPi Wiki or Foundation website for more info.

"The result of almost a year of development by NVIDIA, Valve and other game developers, the new GeForce R310 drivers are designed to give GeForce customers the best possible Linux-based PC gaming experience - and showcase the enormous potential of the world's biggest open-source operating system." Like I said: something is happening here. No, not all problems will be solved overnight - but something is happening here, and you have to start somewhere. The fact that several gaming companies and NVIDIA are working together on this is a very clear sign that commitments have been made.

A new version of the real-time Linux scheduler called SCHED_DEADLINE has been released on the Linux Kernel Mailing List. For people who missed previous submissions, it consists of a new deadline-based CPU scheduler for the Linux kernel with bandwidth isolation (resource reservation) capabilities. It supports global/clustered multiprocessor scheduling through dynamic task migrations. This new version takes into account previous comments/suggestions and is aligned to the latest mainline kernel. A video about SCHED_DEADLINE is also available on YouTube.