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Linux Systems Field Manual

linux/Kconfig

Imported from _research/manual-study-linux/file-notes/linux__Kconfig.md.

File Notes: Kconfig

Status: reviewed.

Purpose: top-level feature configuration model.

Review target: option hierarchy, dependency expression, defaults, and Rust workspace/config translation.

Evidence

  • Top-level Kconfig is the root of Linux’s feature-selection graph.
  • The subsystem pages depend on Kconfig-selected behavior: preemption, RCU variants, BPF, tracing, cgroups, modules, and Rust support can all change the compiled kernel surface.

Design Notes

A Rust system needs declarative feature configuration and dependency validation. Architecture research should always record which configuration assumptions were used.