drain_data_vio_pool(9)

💖 drain_data_vio_pool — from the Kernel API Manual, bestie edition 🎀

okay so this one's from the Kernel API Manual (section 9, the kernel-functions section, iykyk) and honestly the name says a lot already. Let's get into it ✨

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🌸 NAME 🌸

drain_data_vio_pool — wait asynchronously for all data_vios to be returned to the pool.

that's it, that's the whole vibe. no blocking, no sitting around, just asynchronous waiting. main character energy fr 💅

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✨ SYNOPSIS ✨

void drain_data_vio_pool (struct data_vio_pool *pool , struct
vdo_completion *completion );

like, literally copy-paste that, do not retype it, my heart cannot take typos in a signature 😭

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🦋 ARGUMENTS 🦋

• pool — the data_vio pool. this is the pool we're draining, the whole reason we're here 🫶
• completion — the completion to notify when the pool has drained. your little notification bestie that gets pinged the moment the drain is done ⭐

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👑 SEE ALSO 👑

the kernel file this lives in: ./drivers/md/dm-vdo/data-vio.c 🌈

and now the friend group, in the exact order the page gives them (do NOT come for me about the ordering, I don't make the rules) 💀

• Bio flags.(9)
• Introduction(9)
• check_for_drain_complete_locked(9)
• pack_status(9)
• set_data_vio_compression_status(9)
• cancel_data_vio_compression(9)
• attempt_logical_block_lock(9)
• launch_data_vio(9)
• schedule_releases(9)
• process_release_callback(9)
• initialize_data_vio(9)
• make_data_vio_pool(9)
• free_data_vio_pool(9)
• vdo_launch_bio(9)
• resume_data_vio_pool(9)
• dump_data_vio_pool(9)
• release_allocated_lock(9)
• release_logical_lock(9)
• finish_cleanup(9)
• get_data_vio_operation_name(9)
• data_vio_allocate_data_block(9)
• release_data_vio_allocation_lock(9)
• uncompress_data_vio(9)
• modify_for_partial_write(9)
• read_block(9)
• update_block_map(9)
• read_old_block_mapping(9)
• pack_compressed_data(9)
• compress_data_vio(9)
• launch_compress_data_vio(9)
• hash_data_vio(9)
• write_bio_finished(9)
• acknowledge_write_callback(9)
• allocate_block(9)
• handle_allocation_error(9)
• continue_data_vio_with_block_map_slot(9)

like a whole squad of (9) pages, obsessed 🧚💜

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quick vibe check: the only things to hand over are pool and completion, and the function returns void — no return value to check, the async notification is the whole point 🍓

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and that's the page!! brought to you by the source at ./drivers/md/dm-vdo, October 2026 vintage, drain_data_vio_pool(9) flavored — slay, go drain your pool responsibly 💖✨🎀