vdo_release_hash_lock(9)

💅 vdo_release_hash_lock(9) — like, the kernel API manual bestie ✨

okay so we're in the Kernel API Manual today and the star of the show is vdo_release_hash_lock(9) — say that three times fast, I dare you 🫶

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✨ NAME ✨

vdo_release_hash_lock — hiii so this one lets go of a data_vio's share of a hash lock if it's actually holding one, and then it nulls out that data_vio's reference to it. clean, simple, iconic 💅

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🌸 SYNOPSIS 🌸

void vdo_release_hash_lock (struct data_vio *data_vio );

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🎀 ARGUMENTS 🎀

• data_vio — the data_vio that's out here releasing its hash lock. that's the whole mood 💖

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🦋 DESCRIPTION 🦋

so here's the tea 🍓: if the data_vio is the only one holding the lock, this function also releases any resources or locks the hash lock is using — think a PBN read lock on a block that contains data with the same hash — and then it hands the lock back to the hash zone's lock pool. like returning a library book but make it kernel-level ✨

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⭐ CONTEXT ⭐

⚠️ bestie listen to me: this must only be called in the correct thread for the hash zone. no cap, do not freelance this one 😭

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💜 SEE ALSO 💜

• Kernel file ./drivers/md/dm-vdo/dedupe.c
• Introduction(9)
• return_hash_lock_to_pool(9)
• vdo_get_duplicate_lock(9)
• hash_lock_key(9)
• get_hash_lock_state_name(9)
• assert_hash_lock_agent(9)
• set_duplicate_lock(9)
• dequeue_lock_waiter(9)
• set_hash_lock(9)
• exit_hash_lock(9)
• set_duplicate_location(9)
• retire_lock_agent(9)
• wait_on_hash_lock(9)
• abort_waiter(9)
• start_bypassing(9)
• finish_unlocking(9)
• unlock_duplicate_pbn(9)
• start_unlocking(9)
• finish_updating(9)
• start_updating(9)
• finish_deduping(9)
• acquire_lock(9)
• enter_forked_lock(9)
• fork_hash_lock(9)
• launch_dedupe(9)
• start_deduping(9)
• increment_stat(9)
• finish_verifying(9)
• start_verifying(9)
• finish_locking(9)
• lock_duplicate_pbn(9)
• start_locking(9)
• finish_writing(9)
• select_writing_agent(9)
• start_writing(9)
• finish_querying(9)
• start_querying(9)
• report_bogus_lock_state(9)
• vdo_continue_hash_lock(9)
• is_hash_collision(9)
• vdo_acquire_hash_lock(9)
• transfer_allocation_lock(9)
• vdo_share_compressed_write_lock(9)
• report_dedupe_timeouts(9)
• finish_index_operation(9)
• check_for_drain_complete(9)
• vdo_make_hash_zones(9)
• vdo_free_hash_zones(9)
• suspend_index(9)
• resume_index(9)
• vdo_resume_hash_zones(9)
• get_hash_zone_statistics(9)
• vdo_get_dedupe_statistics(9)
• vdo_select_hash_zone(9)
• dump_hash_lock(9)
• dump_hash_zone(9)
• vdo_dump_hash_zones(9)
• acquire_context(9)

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aaand that's the whole page, bestie, you ate that 🏆 this one lives in ./drivers/md/dm-vdo, it's dated October 2026, and it goes by vdo_release_hash_lock(9) — mwah, see you in the next man page 💋🌈