flush_block_map_updates(9)

💅 flush_block_map_updates — a kernel API manual moment

okay so this is a page from the Kernel API Manual, and honestly? it's a short one but it's got main character energy anyway. let's get into it ✨

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🌸 NAME 🌸

flush_block_map_updates — bestie, this one flushes the block map now that all the reference counts are rebuilt. that's the whole vibe. 💖

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🦋 SYNOPSIS 🦋

void flush_block_map_updates (struct vdo_completion *completion );

like, it returns void, it takes one arg, it's giving "quietly does its job" energy. no cap. 🎀

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✨ ARGUMENTS ✨

• completion — the repair completion. that's it, that's the whole parameter, and it's literally the repair completion, so don't overthink it 🫶

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🔥 DESCRIPTION 🔥

so this callback is registered in finish_if_done. that's the entire description, i fear. it's short, it's iconic, it's lowkey mysterious. 💅

ngl the manpage is not gonna hold your hand here — the actual story lives over in the source, and the SEE ALSO section is your group chat. 😭

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🌈 SEE ALSO 🌈

okay this is the part where the page goes FULL group chat. every one of these is a (9) kernel file reference, and the whole crew lives in the kernel file ./drivers/md/dm-vdo/repair.c — so like, that's the address, that's the hangout spot, that's where everybody's at. 🦋

• as_repair_completion(9)
• abort_repair(9)
• abort_on_error(9)
• drain_slab_depot(9)
• handle_page_load_error(9)
• unmap_entry(9)
• remove_out_of_bounds_entries(9)
• process_slot(9)
• rebuild_reference_counts_from_page(9)
• page_loaded(9)
• fetch_page(9)
• rebuild_from_leaves(9)
• process_entry(9)
• advance_points(9)
• before_recovery_point(9)
• get_entry(9)
• validate_recovery_journal_entry(9)
• add_slab_journal_entries(9)
• vdo_replay_into_slab_journals(9)
• find_entry_starting_next_page(9)
• get_recovery_journal_block_header(9)
• is_valid_recovery_journal_block(9)
• is_exact_recovery_journal_block(9)
• find_recovery_journal_head_and_tail(9)
• unpack_entry(9)
• append_sector_entries(9)
• extract_new_mappings(9)
• compute_usages(9)
• vdo_repair(9)

like, twenty-nine besties, all here, all accounted for. no one left behind, periodt. 👑

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and that's the page!! 💜 cute little sign-off time: this one's sourced from ./drivers/md/dm-vdo, dated October 2026, and it's filed right back under flush_block_map_updates(9) — so you literally cannot lose it. slay. 🌟🎀