KnowledgeBase
Developer
KernelTeamBugPolicies - How to triage kernel bugs.
KernelDevelopmentShift - New development model.
KernelGitGuide - Using the git repos.
KernelUpdates - Updates to stable kernels.
KernelMaintenance - How to maintain the kernel.
KernelMaintenanceStarter - Cheatsheet for KernelMaintenance.
KernelTeam/KernelBuildScripts - Information on how to use some helper scripts for remote building.
KernelPatches - Why we will or won't take patches.
KernelPackageVersioning - How to version changes to kernel packages.
KernelPackageABIRelationships - Which packages need ABI bumping during stable updates.
Debugging
DebuggingIRQProblems - Help debugging common IRQ problems.
User info
KernelCustomBuild - Building your own kernels.
GitKernelBuild - Build mainline kernel from git. Also help with submitting bugs to upstream bugzilla.kernel.org
Reference
KernelVMAddressing - Per-arch breakdown of VM addressing