rb_check_pages(9)

💅 rb_check_pages(9) — the "is my buffer okay?" vibe check ✨

okay so bestie, we're in the Kernel API Manual today, and this page is rb_check_pages(9). yes it's a level-9 manpage, yes it's kernel internals, no you don't have to be scared. sit with me. 🫶

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✨ NAME ✨

rb_check_pages — the integrity check of buffer pages, and honestly it's giving "paranoid but make it safety" 💖

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✨ SYNOPSIS ✨

void rb_check_pages (struct ring_buffer_per_cpu *cpu_buffer );

that's it. that's the whole function signature. no return value, void, it just goes in there and looks at stuff. main character energy tbh. 👑

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✨ ARGUMENTS ✨

• cpu_buffer — the CPU buffer with pages to test 🌸 like, this is the one you're checking up on. the pages live in here, and this is the buffer we're inspecting, okay?

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✨ DESCRIPTION ✨

so here's the tea ☕ as a safety measure, we check to make sure the data pages have not been corrupted.

that's it. that's the whole job. it's the kernel being a good friend and going "hey bestie, let me just double-check those pages real quick" before anything goes sideways 😭💀. no cap, sometimes the most important code is just the code that looks at things and confirms things are fine. slay.

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✨ SEE ALSO ✨

okay so the whole fam is here and they all live in the kernel file ./kernel/trace/ring_buffer.c — literally the group chat of ring buffer functions, iykyk 🦋 not me listing every single one because we do not skip anyone in this house:

• ring_buffer_event_length(9)
• ring_buffer_event_data(9)
• rb_page_capacity(9)
• rb_subbuf_capacity(9)
• rb_subbuf_max_data_size(9)
• rb_subbuf_start(9)
• ring_buffer_event_time_stamp(9)
• ring_buffer_nr_dirty_pages(9)
• ring_buffer_wake_waiters(9)
• ring_buffer_wait(9)
• ring_buffer_poll_wait(9)
• rb_validate_buffer(9)
• __ring_buffer_alloc(9)
• __ring_buffer_alloc_range(9)
• __ring_buffer_alloc_remote(9)
• ring_buffer_free(9)
• ring_buffer_resize(9)
• rb_update_event(9)
• ring_buffer_nest_start(9)
• ring_buffer_nest_end(9)
• ring_buffer_unlock_commit(9)
• ring_buffer_lock_reserve(9)
• ring_buffer_discard_commit(9)
• ring_buffer_write(9)
• ring_buffer_record_disable(9)
• ring_buffer_record_enable(9)
• ring_buffer_record_off(9)
• ring_buffer_record_on(9)
• ring_buffer_record_is_on(9)
• ring_buffer_record_is_set_on(9)
• ring_buffer_record_is_on_cpu(9)
• ring_buffer_record_disable_cpu(9)
• ring_buffer_record_enable_cpu(9)
• ring_buffer_oldest_event_ts(9)
• ring_buffer_bytes_cpu(9)
• ring_buffer_entries_cpu(9)
• ring_buffer_overrun_cpu(9)
• ring_buffer_commit_overrun_cpu(9)
• ring_buffer_dropped_events_cpu(9)
• ring_buffer_read_events_cpu(9)
• ring_buffer_entries(9)
• ring_buffer_overruns(9)
• ring_buffer_iter_reset(9)
• ring_buffer_iter_empty(9)
• ring_buffer_peek(9)
• ring_buffer_iter_peek(9)
• ring_buffer_consume(9)
• ring_buffer_read_start(9)
• ring_buffer_read_finish(9)
• ring_buffer_iter_advance(9)
• ring_buffer_size(9)
• ring_buffer_max_event_size(9)
• ring_buffer_reset_cpu(9)
• ring_buffer_reset_online_cpus(9)
• ring_buffer_reset(9)
• ring_buffer_empty(9)
• ring_buffer_empty_cpu(9)
• ring_buffer_swap_cpu(9)
• ring_buffer_alloc_read_page(9)
• ring_buffer_free_read_page(9)
• ring_buffer_read_page(9)
• ring_buffer_read_page_data(9)
• ring_buffer_read_page_size(9)
• ring_buffer_subbuf_size_get(9)
• ring_buffer_subbuf_order_get(9)
• ring_buffer_subbuf_order_set(9)

yeah. sixty-six of them. we ate and left no crumbs 🔥

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🎀 and that's the page!! this one comes to you from the source ./kernel/trace, dated October 2026 — so go forth, check those pages, and stay uncorrupted bestie 💜✨