Linux Memory Management Subsystem
- Documentation and development news for the memory management subsystem of the kernel.
- http://linux-mm.org/

Understanding the Linux Kernel, Volume 2
- A book covering all non-networking aspects of the 2.4 kernel.
- http://www.oreilly.com/catalog/linuxkernel2/

Kernel Traffic
- A weekly summary of the high volume linux-kernel mailing list.
- http://www.kerneltraffic.org/

KDB
- Built-in kernel debugger from SGI.
- http://oss.sgi.com/projects/kdb/

kgdb
- Linux kernel source level debugger.
- http://kgdb.sourceforge.net/

The CML2 Resources Page
- Project to create a new configuration system for the Linux kernel build process
- http://catb.org/~esr/kbuild

Recompiling your kernel
- Compilation instructions. New tutorials wanted.
- http://www.recompile.org

Richard Gooch's Kernel Patches
- A list of patches/contributions made by Richard Gooch.
- http://www.atnf.csiro.au/~rgooch/linux/kernel-patches.html

T/TCP for Linux
- An implementation of T/TCP (Transaction TCP) for the Linux kernel.
- http://ttcplinux.sourceforge.net

Improving (network) IO performance ...
- A study on how to improve network performance.
- http://www.xmailserver.org/linux-patches/nio-improve.html

Kernel Newsflash
- List of known bugs, organized by version number.
- http://www.atnf.csiro.au/~rgooch/linux/docs/kernel-newsflash.html

Proconfig
- A module to record kernel configuration options.
- http://www.it.uc3m.es/~ptb/proconfig/

Linux Compressed Cache
- Details an experimental, additional level in the virtual memory hierarchy.
- http://linuxcompressed.sourceforge.net

Robert Love's kernel patches.
- Kernel patches including a pre-emptible kernel patch.
- http://www.tech9.net/rml/linux/

Linux Rebuild Procedure
- Information on how to build a custom kernel.
- http://www.digitalhermit.com/linux/kernel.html

KernelTrap.org
- A kernel related news site with a Linux bias.
- http://www.kerneltrap.org

Linux Kernel Mailing List Archive
- Searchable archive of kernel development e-mail list.
- http://www.uwsg.indiana.edu/hypermail/linux/kernel/index.html

Kernel Documents
- Index of online documents and printed books, with keywords and descriptions.
- http://jungla.dit.upm.es/~jmseyas/linux/kernel/hackers-docs.html

Linux Kernel Internals
- Document which describes booting, processes, interrupts, VFS, page cache.
- http://www.moses.uklinux.net/patches/lki.html

The SIG11 problem
- Possible causes of a signal 11 occurring while compiling the kernel.
- http://www.bitwizard.nl/sig11/

UK.Linux.org
- Alan Cox's webpage, stable kernel release notes, and Linux news.
- http://www.linux.org.uk