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.

Latest Linux Hardware Reviews
  1. 13-Way Low-End GPU Comparison With AMD's AM1 Athlon
  2. ASUS AM1I-A: A Mini-ITX Board For Socketed Kabini APUs
  3. Mini-Box M350: A Simple, Affordable Mini-ITX Case
  4. Overclocking The AMD AM1 Athlon & Sempron APUs
Latest Linux Articles
  1. Ubuntu 12.04.4 vs. 13.10 vs. 14.04 LTS Desktop Benchmarks
  2. AMD OpenCL Performance With AM1 Kabini APUs
  3. A Quick Look At GCC 4.9 vs. LLVM Clang 3.5
  4. Are AMD Athlon/Sempron APUs Fast Enough For Steam On Linux?
Latest Linux News
  1. Git 2.0 Test Releases Begin With Many Changes
  2. Wine 1.7.17 Works On Its Task Scheduler, C Run-Time
  3. The Improv ARM Board Still Isn't Shipping; Riding A Dead Horse?
  4. Debian To Maintain 6.0 Squeeze As An LTS Release
  5. Wasteland 2 Is Finally Released For Linux Gamers
  6. FreeBSD Advances For ARM, Bhyve, Clang
  7. Ubuntu 14.04 LTS "Trusty Tahr" Officially Released
  8. Ubuntu 12.04 LTS vs. 14.04 LTS Server Benchmarks
  9. QEMU 2.0 Released With ARM, x86 Enhancements
  10. Running The Unity 8 Preview Session On Ubuntu 14.04 LTS
  11. R600 Gallium3D Disables LLVM Back-End By Default
  12. Fedora 21 Gets GNOME 3.12, PHP 5.6, Mono 3.4
Latest Forum Discussions
  1. Suggestions about how to make a Radeon HD 7790 work decently?
  2. The GNOME Foundation Is Running Short On Money
  3. Updated and Optimized Ubuntu Free Graphics Drivers
  4. Radeon 8000M problematic on Linux?
  5. Linux Kernel Developers Fed Up With Ridiculous Bugs In Systemd
  6. After Jack Keane, RuseSoft will briing Ankh 3 to Linux through Desura
  7. Suspected PHP Proxy Issue
  8. Change installation destination from home directory