A second version of the Zswap patch-set for the Linux kernel was published this week. The Zswap patches provide compressed swap caching support to compress pages in the process of being swapped and compresses them into a dynamically allocated RAM-backed memory pool.
There's ongoing work so that graphics cards can be assigned for use by virtual machines with QEMU.
Affecting the latest Linux kernel release, Linux 3.7, are "multiple apparently unrelated network performance issues." The major network performance problems were reported by a well-known Linux kernel developer.
Linus Torvalds has announced the first development kernel update of 2013.
It's been a few years since last having anything to talk about with regard to the Tux3 file-system, but with the new year comes news on Tux3. This file-system has advanced and is more competitive now with EXT4.
KTAP is an experimental project that's a new dynamic tracing tool for Linux. KTAP has several different design principles from SystemTap, one of the current most common dynamic instrumentation and tracing tools for Linux. This new project might satisfy some of those developers that have been wanting Sun/Oracle's DTrace to come to Linux.
Over this weekend a new DRM pull request was submitted by David Airlie for the Linux 3.8 kernel.
A new driver has been written for supporting Intel QST, Quiet System Technology, on Linux.
While there's a lot of features that are new to the Linux 3.8 kernel as covered in The Feature Overview For The Linux 3.8 Kernel, there's also several promising new features and functionality that didn't make the cut for this next kernel release.
With the merge window having closed on the Linux 3.8 kernel, here's a comprehensive list of the most interesting features for this next major open-source kernel release.
While there's a lot of great stuff to the Linux 3.8 kernel, with the merge window recently closed, one feature that's long been lacking from the mainline Linux kernel is support for kernel mode-setting (KMS) on VIA graphics hardware.
A few months ago I wrote about hot-data tracking for the Linux kernel, a VFS feature that could be used by Btrfs and other Linux file-systems for delivering improved performance. Unfortunately the patch-set didn't make the new Linux 3.8 development cycle, but hot-data tracking is still being worked on for merging into a future Linux kernel release.
One of the merges not yet talked about for the Linux 3.8 kernel was the mainlining of the F2FS file-system for flash devices.
The first release candidate of the Linux 3.8 kernel was made available on Friday.
Advanced Vector Extensions (AVX) have been present in Intel and AMD hardware since last year with Sandy Bridge and Bulldozer processors, respectively, but their use isn't too very widespread at this point. Fortunately, the Linux kernel has been receiving some AVX1/AVX2 optimizations.
Dynticks, the Dynamic Tick Timer for allowing the Linux kernel to skip ticks while idling and resume to running at full HZ when encountering load, is in the process of being extended. Developers are working on making Dynticks work even under select workloads in order to enhance the performance of CPU-intensive tasks.
The Balance NUMA branch of the Linux kernel has been merged for the current 3.8 development cycle.
The Btrfs file-system updates for the Linux 3.8 kernel will feature performance improvements among other work. Btrfs RAID 5/6 support is also to be published this week.
The EXT4 file-system pull request for the Linux 3.8 kernel has been submitted and it's bringing fixes plus introduces two new features.
David Airlie has sent in the highly-anticipated DRM pull request for the Linux 3.8 kernel. This includes the new Tegra driver and changes to the Nouveau/Radeon/Intel graphics drivers.
Version 426 of the BFS scheduler was released this weekend for the Linux 3.7 kernel.
A new CPU scheduler for the Linux kernel was announced on Saturday. This new scheduler is based upon the controversial "Brain Fuck Scheduler" scheduler but attempts to support multiple run-queues for better CPU scaling.
While we are just a few days into the Linux 3.8 kernel merge window and there's still a number of pull requests that have yet to appear for this next kernel development cycle with new features, there's already a ton of exciting work. If you missed the horde of Phoronix articles in the past few days covering the prominent features, here's a recap showing why this Linux kernel being developed over the holidays is a great gift for its users.
The FUSE module, which allows for file-systems to be run from user-space, can now process direct I/O a-synchronously. This a-synchronous direct I/O can lead to very noticeable performance improvements for FUSE-based file-systems like ZFS.
A hash-based denial-of-service attack vulnerability has been discovered for the Btrfs, the next-generation Linux file-system.
The Linux 3.8 kernel is continuing to pull in massive amounts of new code as shown by all of the noteworthy pull requests that have been highlighted on Phoronix in the past few days. The latest pull request to catch my interest has been the crypto work, thanks to performance-enhancing additions by Intel.
The audio/sound pull for the Linux 3.8 kernel has been sent in and it features audio driver improvements, new capabilities, clean-ups, and more.
For certain workloads with the Linux 3.8 kernel the physical memory usage is lowered by a significant amount thanks to improvements within this kernel that's presently under development.
Now that the Linux kernel has dropped support for old Intel 386 CPUs, GCC developers are also considering the removal of i386 support from their compiler.
While it might be too late to make the Linux 3.8 kernel merge window, released on Wednesday were the latest patches for the ongoing work by Intel open-source developers and others to enact atomic mode-setting and page-flipping.
1311 Linux Kernel news articles published on Phoronix.