f2fs-checkpoint · shipping · also F2FS checkpoint pack

F2FS checkpoint

An F2FS checkpoint records a consistent filesystem recovery point, including information selecting valid metadata-table versions.

Related Observatory article: F2FS checkpoint on hesela.com

The documented checkpoint=disable mode preserves an older recovery view across unmount or shutdown while disabled. In upstream Linux v6.12 and v6.16, the regular-file fsync path can return successful data-writeback status before later recovery-metadata handling when SBI_CP_DISABLED is set. It is not merely a longer checkpoint interval. [1] [2] [3]

Relations

related

f2fs, f2fs-roll-forward-recovery, fsync, crash-consistency

Citations

1. Linux 6.12 F2FS documentation: checkpoint, recovery and fsync mount policies. (accessed 2026-10-15)
2. Linux v6.12 fs/f2fs/file.c: f2fs_do_sync_file and checkpoint fallback. (accessed 2026-10-15)
3. Linux v6.16 fs/f2fs/file.c: regular-file writeback and SBI_CP_DISABLED return. (accessed 2026-10-15)
4. F2FS: when a successful fsync is not a recovery promise (accessed 2026-10-15)

JSON: /data/terms/f2fs-checkpoint.json