General Kernel Configuration: Difference between revisions
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This page helps with the configuration of the Linux kernel. Remember, configuring the kernel is easy - you just have to know which hardware you have quite well. | This page helps with the configuration of the Linux kernel. Remember, configuring the kernel is easy - you just have to know which hardware you have quite well. | ||
= General Information = | |||
The kernel sources are unpacked in /usr/src (at least on Gentoo). | The kernel sources are unpacked in /usr/src (at least on Gentoo). | ||
| Line 13: | Line 13: | ||
make oldconfig | make oldconfig | ||
= Hardware Detection = | |||
* There is a nice link [http://gentoo-wiki.com/HARDWARE_Detecting_your_Hardware at the Gentoo wiki.] | * There is a nice link [http://gentoo-wiki.com/HARDWARE_Detecting_your_Hardware at the Gentoo wiki.] | ||
* Basically, emerge pciutils lshw usbutils, which gives you lspci, lshw, and lsusb. | * Basically, emerge pciutils lshw usbutils, which gives you lspci, lshw, and lsusb. | ||
= Kernel Configuration = | |||
== Choice of the scheduler == | == Choice of the scheduler == | ||
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* If Gentoo hangs when starting (when running the clock init script) and you are using the support in Character Devices, change it to use the one in Real Time Clock (which I guess is newer and better). | * If Gentoo hangs when starting (when running the clock init script) and you are using the support in Character Devices, change it to use the one in Real Time Clock (which I guess is newer and better). | ||
== Reading foreign partition tables == | |||
* Each OS creates its own partition table format when initializing / formatting a disk. You can build support for reading these partition table formats with Linux; it's under File Systems -> Partition Types. Note that I don't really know what partition table format Linux uses. | |||
Revision as of 10:27, 8 January 2009
This page helps with the configuration of the Linux kernel. Remember, configuring the kernel is easy - you just have to know which hardware you have quite well.
General Information
The kernel sources are unpacked in /usr/src (at least on Gentoo).
- Once you are in the kernel source directory, use the following command to configure graphically your kernel:
make menuconfig
- When migrating to a new kernel, copy your old .config file from the old kernel directory to the new one and type:
make oldconfig
Hardware Detection
- There is a nice link at the Gentoo wiki.
- Basically, emerge pciutils lshw usbutils, which gives you lspci, lshw, and lsusb.
Kernel Configuration
Choice of the scheduler
- There is an I/O scheduler in the section Block Layer. This is different from the CPU scheduler. The SD scheduler is a *CPU* scheduler.
- In vanilla-sources, apparently there is no choice for the CPU scheduler. Same is true for ck-sources (where SD scheduler is mandatory).
Real Time Clock (RTC) support
- With recent kernels (2.6.25+), there are two areas for this configuration.
- Device Drivers -> Character Devices
- Device Drivers -> Real Time Clock
- If Gentoo hangs when starting (when running the clock init script) and you are using the support in Character Devices, change it to use the one in Real Time Clock (which I guess is newer and better).
Reading foreign partition tables
- Each OS creates its own partition table format when initializing / formatting a disk. You can build support for reading these partition table formats with Linux; it's under File Systems -> Partition Types. Note that I don't really know what partition table format Linux uses.