cancel_data_vio_compression(9)

✨ cancel_data_vio_compression(9) ✨

okay so bestie, we're in the Kernel API Manual today and this page is literally about cancel_data_vio_compression — a little function with big "not today, compression" energy 💅

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🎀 NAME 🎀

cancel_data_vio_compression — the glow-up-blocker: it prevents this data_vio from being compressed or packed 💖

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🌸 SYNOPSIS 🌸

bool cancel_data_vio_compression (struct data_vio *data_vio );

like… that's it. one function, one argument, returns a bool. iconic. ✨

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🦋 ARGUMENTS 🦋

• data_vio — the data_vio in question 🫶 (yes it's just "The data_vio", she's the main character of this page, no notes)

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⭐ RETURN ⭐

it hands back true if the data_vio is in the packer and the caller was the first caller to cancel it 👑

read that twice, bestie — it's not just "did the cancel work", it's "were you the first one to the cancel party". if somebody else already cancelled it, you don't get the true. no cap. 💀

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🌈 SEE ALSO 🌈

grab a snack, this list is long — but every single one is here because the original said so, and we don't skip ✨

• Kernel file ./drivers/md/dm-vdo/data-vio.c
• Bio flags.(9)
• Introduction(9)
• check_for_drain_complete_locked(9)
• pack_status(9)
• set_data_vio_compression_status(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)
• drain_data_vio_pool(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)

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and that's the whole vibe check, bestie 🌷 this page lives in ./drivers/md/dm-vdo, the manpage itself is dated October 2026, and it's filed under the name cancel_data_vio_compression(9) — so when you come back to it later, you'll know exactly which one you're reading 🎀✨ 🦋