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In Linux 3.1, the new-DRM/KMS driver for example will be able to generate a firmware “fuc” for Fermi graphics chips. Firmware enables the kernel use various GPU Fermi graphics of last two series chip GeForce 3D, 400 and 500. The wiki says that this functionality will probably work on chips of NVC0, NVC4 and NVCE which are incorporated in the models of GeForce GTX with these numbers 460, 465, 470, 470 M, 480, 480 M or 560. Several other models with the Fermi GPUS have experienced problems. Some are still not tested or are known to work with the original firmware, which can be obtained via the proprietary NVIDIA drivers and some rather heavy tips.

The developers of the Intel DRM/KMS driver intended to enable the functionality of “RC6″ by default; RC6 is a power save mechanism that is available with most processors and chipsets Intel introduced in the last two years (as the Core with integrated graphics processor). However, kernel hacker soon is the amendment to allow default of RC6, as technology caused system to user problems. It works very well with many portable computers, where it can sometimes reduce the energy consumption of the system a slowdown by 6 watts. This can considerably extend the life of the battery of a computer; less development of heat means also that the fan will operate less frequently or loudly. On some portable computers with compatible hardware RC6, may therefore be useful to enable and test functionality – to this end, add “i915_enable_rc6 = 1″ parameter when loading the i915 module, or call the kernel with the parameter “i915″. i915_enable_rc6 = 1 “.”

This article provides an overview of the most important changes of Linux version 3.1. More detailed information in the Logs of the nucleus of the Minie “Come 3.1″, can be found out of the series in recent weeks on the h open, which form the basis of this article.

Part 1: networking

Part 2: File and storage systems

Part 3: Architecture, infrastructure and virtualization

Part 4: drivers

You will find in these articles, the source of the more detailed articles covering the important changes in each region. There is also the “Minor Gems” section that lists many other changes not mentioned in the main article, but for many users, who are still of great importance.

The kernel developers have added rtl8192de (for example 1) driver that supports the Realtek RTL8192DE and chip RTL8188DE PCIe Wi – Fi. The iwlagn driver which covers the Intel WiFi chipsets currently included in many books of basic support WoWLAN (Wake on wireless LAN). The b43 driver for Broadcom WiFi chips now supports various 802. . .11n ready ready – compatible WiFi adapters that use advances microcontroller Architecture of Bus (the Broadcom AMBA) – such as the BCM43224 (PCI – ID 14e4: 4353) and BCM43225 chipset (14e4: 4357), which, to date, requires Broadcom driver requiring brcmsmac.

However, the Linux developers avoid several drivers to support a chip or a series of closely related in the core components. Details of the background are in kernel log and in the article “comment by the kernel: barriers of cooperation of the race” to the H Open. Currently, it seems that the brcm80211 brcmsmac driver will win the race to integrate, as it is planned to move the staging on the subsystem of wireless in Linux 3.2. It remains to see if the kernel developers disable certain functions in the b43 driver to avoid problems and confusion.

While Linux 3.0 provided last components essential to allow the operation of the machine for the Xen hypervisor, version 3.1 obtained the backend Xen PCI, which allows the kernel to (for example 1, 2) PCI/PCIe devices Xen guests. KVM now provides the base functionality for the departure of systems invited from Intel processors in another guest system (nested virtualization) on (for example 1, 2). Classified experimental and disabled by default, the copy zero support RX for Macvtap and Vhost-net is designed to improve network performance in virtualized environments, because it helps reduce the administrative overhead when data on the network are repries or transmitted by the host