blkcg_deactivate_policy(9)

💅 blkcg_deactivate_policy — the manual page (Kernel API Manual, bestie)

okay so first things first: this is blkcg_deactivate_policy(9) from the Kernel API Manual, and we're about to make deactivating a blkcg policy on a gendisk make Sense™. buckle up 🎀

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✨ NAME ✨

blkcg_deactivate_policy — deactivate a blkcg policy on a gendisk

like literally, that's the whole vibe: policy goes off, disk says bye 👋

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🦋 SYNOPSIS 🦋

void blkcg_deactivate_policy (struct gendisk *disk , const struct
       blkcg_policy *pol );

so you're handing it a disk and a pol, and it returns void — meaning it gives you nothing back, no return value, no lil gift, just vibes and side effects 💀 don't @ me

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🌸 ARGUMENTS 🌸

• disk — gendisk of interest 🫶 the disk you're looking at, the main character of this operation
• pol — blkcg policy to deactivate ✨ the policy that's getting un-invited from the party

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💖 DESCRIPTION 💖

Deactivate pol on disk. that's it, that's the whole thing, no cap 💅

and the important part — the part where you do not freestyle, bestie — it follows the same synchronization rules as blkcg_activate_policy. so whatever locking and ordering energy the activate side has going on, this one is matching it exactly. same rules, different direction. iykyk 🔥

ngl this is the "don't get creative with concurrency" part of the page. the manual says "same synchronization rules as blkcg_activate_policy" and it means it fr fr 🙈

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👑 SEE ALSO 👑

Kernel file ./block/blk-cgroup.c — and then the whole friend group, all of these icons:

• blkcg_css(9)
• blkg_free(9)
• bio_blkcg_css(9)
• blkcg_parent(9)
• blkg_alloc(9)
• blkg_lookup_create(9)
• blkcg_print_blkgs(9)
• __blkg_prfill_u64(9)
• blkg_conf_init(9)
• blkg_conf_open_bdev(9)
• blkg_conf_prep(9)
• blkg_conf_unprep(9)
• blkg_conf_close_bdev(9)
• blkcg_destroy_blkgs(9)
• blkcg_pin_online(9)
• blkcg_unpin_online(9)
• blkcg_css_offline(9)
• blkcg_activate_policy(9)
• blkcg_policy_register(9)
• blkcg_policy_unregister(9)
• blkcg_maybe_throttle_current(9)
• blkcg_schedule_throttle(9)
• blkcg_add_delay(9)
• blkg_tryget_closest(9)
• bio_associate_blkg_from_css(9)
• bio_associate_blkg(9)
• bio_clone_blkg_association(9)

bestie do NOT skip blkcg_activate_policy(9) in that list — it's literally the one the DESCRIPTION told you to match synchronization with 🧚

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🌈 sign-off 🌈

and that's the page!! it lives under ./block, this is the October 2026 version of the Kernel API Manual, and we are so obsessed 💜🍓 go forth and deactivate responsibly, mwah 🫶✨