perform_synchronous_action(9)

💖 perform_synchronous_action(9) 💖

okay bestie, welcome to the Kernel API Manual page for perform_synchronous_action(9) — yes, that page 💅

🌸 NAME 🌸

So perform_synchronous_action launches an action on a VDO thread and waits for it to complete. That’s the whole main character energy: launch the thing on the VDO thread, then wait until it’s done, periodt 💖

✨ SYNOPSIS ✨

it’s giving int, and the signature is literally this:

int perform_synchronous_action (struct vdo *vdo , vdo_action_fn action ,
       thread_id_t thread_id , void *parent );

🎀 ARGUMENTS 🎀

• vdo — the vdo, bestie 🫶
• action — the callback to launch, no cap.
• thread_id — the thread on which to run the action, iykyk.
• parent — the parent of the sync completion; it may be NULL 🦋

🌈 SEE ALSO 🌈

the related-reading group chat is long, but every single one is here, fr fr:

• Kernel file ./drivers/md/dm-vdo/vdo.c and Introduction(9) — both, together, exactly as the list says 💅
• vdo_initialize_device_registry_once(9)
• filter_vdos_locked(9)
• vdo_find_matching(9)
• initialize_thread_config(9)
• get_thread_name(9)
• vdo_make_thread(9)
• register_vdo(9)
• vdo_format(9)
• initialize_vdo(9)
• vdo_make(9)
• free_listeners(9)
• unregister_vdo(9)
• vdo_destroy(9)
• finish_reading_super_block(9)
• handle_super_block_read_error(9)
• vdo_load_super_block(9)
• vdo_get_backing_device(9)
• vdo_get_device_name(9)
• vdo_synchronous_flush(9)
• vdo_get_state(9)
• vdo_set_state(9)
• vdo_get_admin_state(9)
• record_vdo(9)
• continue_parent(9)
• handle_geometry_block_save_error(9)
• vdo_save_geometry_block(9)
• handle_super_block_save_error(9)
• vdo_save_super_block(9)
• vdo_save_components(9)
• vdo_register_read_only_listener(9)
• notify_vdo_of_read_only_mode(9)
• vdo_enable_read_only_entry(9)
• vdo_wait_until_not_entering_read_only_mode(9)
• as_notifier(9)
• finish_entering_read_only_mode(9)
• make_thread_read_only(9)
• vdo_allow_read_only_mode_entry(9)
• vdo_enter_read_only_mode(9)
• vdo_is_read_only(9)
• vdo_in_read_only_mode(9)
• vdo_in_recovery_mode(9)
• vdo_enter_recovery_mode(9)
• complete_synchronous_action(9)
• set_compression_callback(9)
• vdo_set_compressing(9)
• vdo_get_compressing(9)
• vdo_get_physical_blocks_allocated(9)
• vdo_get_physical_blocks_overhead(9)
• get_vdo_statistics(9)
• vdo_fetch_statistics_callback(9)
• vdo_fetch_statistics(9)
• vdo_get_callback_thread_id(9)
• vdo_dump_status(9)
• vdo_assert_on_admin_thread(9)
• vdo_assert_on_logical_zone_thread(9)
• vdo_assert_on_physical_zone_thread(9)
• vdo_get_physical_zone(9)

mwah 💋 — this page comes from the ./drivers/md/dm-vdo source/version, dated October 2026, and it’s literally perform_synchronous_action(9). bye bestie, go be the synchronous action main character 🎀