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

NVIDIA Still Working On Linux 3.11+ Support

NVIDIA

Published on 02 November 2013 09:42 AM EDT
Written by Michael Larabel in NVIDIA
17 Comments

In mid-October I had written how AMD's Catalyst driver surprisingly beat NVIDIA to modern Linux support. While NVIDIA is usually first to support new kernel releases, AMD won in shipping "out of the box" Linux 3.11 and 3.12 compatibility. NVIDIA, however, has devised a workaround and will be coming up with a more proper long-term solution.

NVIDIA outlined the issue pertaining to supporting the Linux 3.11 kernels and newer in a NVIDIA DevTalk posting this week. The blocker for 3.11 support comes down to num_physpages having been removed from the Linux 3.11 kernel and the replacement function not being an effective solution for NVIDIA.

NVIDIA's driver needs to be able to determin that all allocatable memory to the driver can be accessed by the GPU, but with this 3.11 change, that's no longer easily possible for determining the highest allocatable system memory address. NVIDIA is working on a proper solution but for now they've published a patch and are working on integrating this workaround into upcoming driver releases.

The patch provides limited support for 3.11+ by being more aggressive about falling back to a 32-bit DMA zone. This workaround will be used until a more appropriate solution has been developed. With this workaround, only users of systems with extremely large system memory capacities (128GB+ of RAM) could run into problems.

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. ASRock X99 Extreme3 Is An Affordable Choice For Linux Users
  2. A Walkthrough Of The New 32 System Open-Source Linux Benchmarking Test Farm
  3. Habey MITX-6771: Mini-ITX Board With Quad-Core J1900 Bay Trail
  4. OCZ Vector 150 SSD On Linux
Latest Linux Articles
  1. 17-Way Linux Graphics Card Comparison With Civilization Beyond Earth
  2. AMD Kaveri: Open-Source Radeon Gallium3D vs. Catalyst 14.12 Omega Driver
  3. 12-Way AMD Catalyst 14.12 vs. NVIDIA 346 Series Linux GPU Comparison
  4. AMD Catalyst 14.12 Omega Driver Brings Mixed Results For Linux Users
Latest Linux News
  1. Orange Pi Is The Latest Raspberry Pi Inspired ARM Board
  2. An Open-Source Hardware Ambient Light Sensor Is Brought Up
  3. Heterogeneous Memory Management Is Coming Along For The Linux Kernel
  4. NTP Is The Latest Project Struck By Security Issues
  5. LDC 0.15.1 Released For A D Compiler In LLVM
  6. Fedora Doesn't Yet Enable F2FS File-System Support
  7. XZ 5.2 Adds New Multi-Threaded Options
  8. Intel 2.99.917 X.Org Driver Released, 3.0 Release Finally Near
  9. Server-Side XCB Is Being Discussed For The X.Org Server
  10. Adreno A4xx Rendering With Freedreno Takes Shape
Latest Forum Discussions
  1. Looking for an nVidia GPU, but not sure how well they are supported.
  2. Need some hand holding with upgrading xserver
  3. Maker3D - create your 3D RPG
  4. FPS capped on Linux (AMD fglrx drivers)
  5. Speeding up systemd networking service
  6. Major Performance Breakthrough Discovered For Intel's Mesa Driver
  7. Are there an app using HSA ?
  8. The New SuperTuxKart Looks Better, But Can Cause GPU/Driver Problems