initialize_block_map_zone(9)

💅 NAME 💅

okay so this is initialize_block_map_zone(9) from the Kernel API Manual, and she is here to initialize the per-zone portions of the block map. that's the assignment, bestie — per-zone portions, initialized, slay. 💖

✨ SYNOPSIS ✨

int initialize_block_map_zone (struct block_map *map , zone_count_t
       zone_number , page_count_t cache_size , block_count_t maximum_age );

🫶 ARGUMENTS 🫶

• map — the block map. your main character. 👑
• zone_number — the zone to initialize. yes, that zone. ✨
• cache_size — the total block map cache size. noted. 🎀
• maximum_age — the number of journal blocks before a dirtied page is considered old and must be written out. that's the cutoff, no cap. 😭

👀 SEE ALSO 👀

first up, the kernel file is ./drivers/md/dm-vdo/block-map.c — go read her. then the whole squad:

• Block map eras(9)
• initialize_info(9)
• allocate_cache_components(9)
• assert_on_cache_thread(9)
• get_page_state_name(9)
• update_counter(9)
• set_info_state(9)
• find_free_page(9)
• find_page(9)
• select_lru_page(9)
• complete_with_page(9)
• complete_waiter_with_error(9)
• complete_waiter_with_page(9)
• distribute_page_over_waitq(9)
• set_persistent_error(9)
• validate_completed_page(9)
• handle_load_error(9)
• page_is_loaded(9)
• handle_rebuild_read_error(9)
• launch_page_load(9)
• schedule_page_save(9)
• launch_page_save(9)
• completion_needs_page(9)
• allocate_free_page(9)
• discard_a_page(9)
• discard_page_if_needed(9)
• write_has_finished(9)
• handle_page_write_error(9)
• page_is_written_out(9)
• write_pages(9)
• vdo_release_page_completion(9)
• vdo_get_page(9)
• vdo_request_page_write(9)
• vdo_get_cached_page(9)
• vdo_invalidate_page_cache(9)
• get_tree_page_by_index(9)
• in_cyclic_range(9)
• is_not_older(9)
• add_to_dirty_lists(9)
• vdo_find_block_map_slot(9)
• make_forest(9)
• replace_forest(9)
• finish_cursor(9)
• continue_traversal(9)
• finish_traversal_load(9)
• traverse(9)
• launch_cursor(9)
• compute_boundary(9)
• vdo_traverse_forest(9)
• clear_mapped_location(9)
• set_mapped_location(9)

mwah 💋 — this cutie lives in ./drivers/md/dm-vdo, is dated October 2026, and stars initialize_block_map_zone(9). 🎀✨