bfq_pd_offline(9)

💅 bfq_pd_offline — the kernel API glow-up, section 9 🎀

okay so bestie, you're in the Kernel API Manual (section 9, we love a manual section that's just for the kernel girlies) and today's main character is bfq_pd_offline ✨

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🌸 NAME 🌸

bfq_pd_offline — deactivates the entity associated with @pd, and reparents its children entities 🫶

fr fr that's the whole vibe: this entity is going offline, and its kids get a new parent. no entity left behind 💖

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🌈 SYNOPSIS 🌈

void bfq_pd_offline (struct blkg_policy_data *pd );

literally that's it, that's the signature 👑

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🦋 ARGUMENTS 🦋

• pd — the descriptor of the policy that's going offline. that's the whole argument, she's simple and she knows it 💅

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✨ DESCRIPTION ✨

so here's the tea ☕: blkio already grabs the queue_lock for us, so no need to use RCU-based magic 🧚

like, the locking is already handled, bestie — don't go adding RCU sorcery where none is needed, that's not the vibe 😭

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💜 SEE ALSO 💜

kernel file ./block/bfq-cgroup.c 🌸 and all her friends:

• bfq_stat_add(9)
• bfq_stat_read(9)
• bfq_stat_reset(9)
• bfq_stat_add_aux(9)
• blkg_prfill_stat(9)
• bfq_bfqq_move(9)
• __bfq_bic_change_cgroup(9)
• bfq_flush_idle_tree(9)
• bfq_reparent_leaf_entity(9)
• bfq_reparent_active_queues(9)

iykyk, the whole cgroup squad is linked up there 🔥

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🎀 the cute sign-off 🎀

this lil page lives in ./block, and it's dated October 2026 — yes, the future, she's ahead of her time ⭐ that's the source and version info, all accounted for, no cap 💖

okay bye bestie, go reparent those entities responsibly 🦋💅