bfq_delta(9)

💅 bfq_delta — the kernel API manual, bestie edition ✨

okay so the manual name is bfq_delta(9) — yes it's a section 9 kernel API page, we love a (9) moment, and today's whole entire vibe is mapping service into the virtual time domain. that's it. that's the function. slay. 🎀

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✨ NAME ✨

bfq_delta — map service into the virtual time domain. 🦋

✨ SYNOPSIS ✨

u64 bfq_delta (unsigned long service , unsigned long weight );

like, literally that's the whole signature. it hands you back a u64. no cap. 💖

✨ ARGUMENTS ✨

• service — the amount of service. that's the thing we're converting, bestie. 💫
• weight — the scale factor. like, either the weight of an entity or a weight sum, depends on who's asking. 👑

🌈 SEE ALSO 🌈

okay this is the part where the manpage goes full group-chat member list and tags everybody. the kernel file is ./block/bfq-wf2q.c, and the whole friend group shows up:

• bfq_gt(9)
• bfq_update_next_in_service(9)
• bfq_calc_finish(9)
• bfq_entity_of(9)
• bfq_extract(9)
• bfq_idle_extract(9)
• bfq_insert(9)
• bfq_update_min(9)
• bfq_update_active_node(9)
• bfq_update_active_tree(9)
• bfq_active_insert(9)
• bfq_ioprio_to_weight(9)
• bfq_weight_to_ioprio(9)
• bfq_find_deepest(9)
• bfq_active_extract(9)
• bfq_idle_insert(9)
• bfq_forget_entity(9)
• bfq_put_idle_entity(9)
• bfq_forget_idle(9)
• bfq_bfqq_served(9)
• bfq_bfqq_charge_time(9)
• __bfq_activate_entity(9)
• __bfq_requeue_entity(9)
• bfq_activate_requeue_entity(9)
• __bfq_deactivate_entity(9)
• bfq_deactivate_entity(9)
• bfq_calc_vtime_jump(9)
• bfq_first_active_entity(9)
• __bfq_lookup_next_entity(9)
• bfq_lookup_next_entity(9)

every single one of them, (9) and all, no skips, we are thorough. 🫶 note the double-underscore girlies in there — __bfq_activate_entity, __bfq_requeue_entity, __bfq_deactivate_entity and __bfq_lookup_next_entity — they're the internals-coded ones, iykyk. 💀

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ngl there's no OPTIONS section, no EXIT STATUS, no BUGS, no warnings and no examples on this page — it's a tiny little conversion function and it's living its minimal main-character life. the facts above are all the facts. 🔥

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and that's the page, bestie!! 🧚💖✨

cute little sign-off time: this one comes from the source path ./block, dated October 2026 — yes, we're reading a manual page from the future, obsessed, don't question it. 🌸 mwah. 💅