The Whys and Wherefores of the Ubuntu Kernel Config

This page is intended to list factors which have led to specific options being selected where those reasons may not be obvious. More recent releases the complete configuration has been reviewed and the current status with proposed changes recorded.

Release Configurations

Ubuntu Maverick Meerkat 10.10

https://blueprints.launchpad.net/ubuntu/+spec/kernel-maverick-config-review https://wiki.ubuntu.com/KernelTeam/Specs/KernelMaverickConfigReview

Ubuntu Lucid Lynx 10.04 LTS

https://blueprints.launchpad.net/ubuntu/+spec/kernel-lucid-kernel-config-review https://wiki.ubuntu.com/specs/KernelLucidKernelConfigReview

Ubuntu Karmic Koala 9.10

https://blueprints.launchpad.net/ubuntu/+spec/kernel-karmic-kernel-config-review https://wiki.ubuntu.com/specs/KernelKarmicKernelConfig

Ubuntu Jaunty Jackalope 9.04

Jaunty: https://wiki.ubuntu.com/KernelTeam/2.6.28-2-generic-config

CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE

Somewhat counter intuitively the kernel default performance governer us Performance. This is that boot time is measurably faster with this governer. Although this is the default, early userspace switches us to the users chosen governer defaulting to OnDemand.