set_persistent_error(9)

✨ NAME ✨

okay bestie, welcome to the set_persistent_error(9) page from the Kernel API Manual 💖 The name is not being mysterious: set_persistent_error sets a persistent error which all requests will receive in the future. Periodt.

🌸 SYNOPSIS 🌸

The signature is literally this, character for character:

void set_persistent_error (struct vdo_page_cache *cache , const char
       *context , int result );

🎀 ARGUMENTS 🎀

• cache — the page cache, bestie 💅
• context — a string describing what triggered the error.
• result — the error result to set on the cache.

🦋 DESCRIPTION 🦋

Once it’s triggered, all enqueued completions will get this error — no cap 😭. Any future requests will result in this error as well. It’s giving permanent-error main character energy, fr fr.

👑 SEE ALSO 👑

Kernel file ./drivers/md/dm-vdo/block-map.c is the main-character file here, and the related squad is: Block map eras(9), initialize_info(9), allocate_cache_components(9), assert_on_cache_thread(9), get_page_state_name(9), update_counter(9), set_info_state(9), find_free_page(9), find_page(9), select_lru_page(9), complete_with_page(9), complete_waiter_with_error(9), complete_waiter_with_page(9), distribute_page_over_waitq(9), validate_completed_page(9), handle_load_error(9), page_is_loaded(9), handle_rebuild_read_error(9), launch_page_load(9), schedule_page_save(9), launch_page_save(9), completion_needs_page(9), allocate_free_page(9), discard_a_page(9), discard_page_if_needed(9), write_has_finished(9), handle_page_write_error(9), page_is_written_out(9), write_pages(9), vdo_release_page_completion(9), vdo_get_page(9), vdo_request_page_write(9), vdo_get_cached_page(9), vdo_invalidate_page_cache(9), get_tree_page_by_index(9), in_cyclic_range(9), is_not_older(9), add_to_dirty_lists(9), vdo_find_block_map_slot(9), make_forest(9), replace_forest(9), finish_cursor(9), continue_traversal(9), finish_traversal_load(9), traverse(9), launch_cursor(9), compute_boundary(9), vdo_traverse_forest(9), initialize_block_map_zone(9), clear_mapped_location(9), set_mapped_location(9).

mwah 💋 — that’s the set_persistent_error(9) page, with source/version ./drivers/md/dm-vdo and date October 2026. Bye bestie, go be iconic with your persistent errors 🫶