Boot Loader Specification + sd-boot
summary
Defines a simple, distro-agnostic on-disk layout: text type‑1 entries at $BOOT/loader/entries and single-file unified EFI type‑2 binaries, both discoverable and mounted automatically; sd-boot (in the systemd tree) implements this, provides bootctl install/update, exposes boot timing to userspace, and auto-discovers Windows/Mac. Implements automatic boot assessment by renaming entry files with a decrementing counter (three tries is the example) so failed kernels revert automatically. The design is implemented and working in sd-boot and consumed by systemd.
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chapters (10)
- 0:00Introduction to the spec
- 1:11The bootloader specification
- 5:05Managing boot partitions
- 6:52Types of boot entries
- 9:23Comparing entry types
- 12:08Standardization and ownership
- 16:25Q&A: Specification details
- 26:21Introduction to SD-boot
- 34:04Automatic boot assessment
- 39:27Final Q&A and wrap-up
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