1. Computers
  2. Display Drivers
  3. Graphics Cards
  4. Memory
  5. Motherboards
  6. Processors
  7. Software
  8. Storage
  9. Operating Systems


Facebook RSS Twitter Twitter Google Plus


Phoronix Test Suite

OpenBenchmarking.org

Volatile Ranges Still Being Tried For The Linux Kernel

Linux Kernel

Published on 02 January 2014 07:41 AM EST
Written by Michael Larabel in Linux Kernel
1 Comment

The Volatile Ranges feature for the Linux kernel is now in its third year of being developed and a new set of sixteen patches were published today but there's still no sign that the code is ready for merging in the near-term.

Volatile Ranges is another option for Linux application developers to notify the kernel that a range of pages can be discarded from the system's RAM rather than being swapped out to the disk. When the system is suffering from memory pressure, the kernel can first attempt to evict these "volatile ranges" rather than swapping it to the disk. When the application needs the data later, if it was flushed away, the application will be responsible for recreating the lost data. If there was no memory pressure, everything continues to be smooth sailing.

One of the major use-cases for this work is web browsers where volatile ranges can be easily marked and the data regenerated if needed. Volatile Ranges can also be of benefit to memory-constrained mobile devices, but there's also other similar approaches already on Linux for flagging memory that should first be discarded in situations of low memory.

The patches published this morning by Minchan Kim are up to the tenth revision of the most recent Volatile Ranges design. This latest version will work on the Linux 3.12 kernel and has numerous other changes.

Those interested in the new Linux Volatile Ranges patches can find them on the Linux kernel mailing list. There's still greater code review needed and items left on the feature's TODO list, so don't expect the feature to be merged for the Linux 3.14 kernel.

About The Author
Michael Larabel is the principal author of Phoronix.com and founded the web-site in 2004 with a focus on enriching the Linux hardware experience and being the largest web-site devoted to Linux hardware reviews, particularly for products relevant to Linux gamers and enthusiasts but also commonly reviewing servers/workstations and embedded Linux devices. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics hardware drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated testing software. He can be followed via and or contacted via .
Latest Linux Hardware Reviews
  1. Even With Re-Clocking, Nouveau Remains Behind NVIDIA's Proprietary Linux Driver
  2. The Power Consumption & Efficiency Of Open-Source GPU Drivers
  3. AMD R600g/RadeonSI Performance On Linux 3.16 With Mesa 10.3-devel
  4. Intel Pentium G3258 On Linux
Latest Linux Articles
  1. Updated Source Engine Benchmarks On The Latest AMD/NVIDIA Linux Drivers
  2. Nouveau vs. Radeon vs. Intel Tests On Linux 3.16, Mesa 10.3-devel
  3. KVM Benchmarks On Ubuntu 14.10
  4. X.Org Server 1.16 Officially Released With Terrific Features
Latest Linux News
  1. GNOME/GTK On Wayland Gains Focus At GUADEC
  2. GNOME Stakeholders Take Issue With Groupon Over their Gnome
  3. GStreamer VA-API Plug-In Update Adds New Features
  4. Qt 5.4 Going Into Feature Freeze Next Week With Exciting Changes
  5. OpenSUSE Factory Turns Into Rolling Release Distribution
  6. "The World's Most Highly-Assured OS" Kernel Open-Sourced
  7. NVIDIA Is Working Towards VDPAU H.265/HEVC Support
  8. Hawaii Bug-Fixes Start Hitting Mainline RadeonSI Gallium3D
  9. The FFmpeg vs. Libav War Continues In Debian Land
  10. Grand Theft Auto Running On Direct3D Natively On Linux Shows Gallium3D Potential
Latest Forum Discussions
  1. AMD Athlon 5350 APU On Linux
  2. Grand Theft Auto Running On Direct3D Natively On Linux Shows Gallium3D Potential
  3. Linus Torvalds On GCC 4.9: Pure & Utter Crap
  4. Updated and Optimized Ubuntu Free Graphics Drivers
  5. Debian + radeonsi
  6. Open-source drivers on ATI R7 260X
  7. List of Linux friendly Kickstarter projects
  8. Porting Mesa to the Playstation 2