blkcg_policy_register(9)

🎀 blkcg_policy_register(9) 🎀

okay so this is from the Kernel API Manual, and it’s literally the page for registering a blkcg policy. bestie, if you’re deep in block-cgroup land, this is your girl. 💅

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💖 NAME 💖

blkcg_policy_register — register a blkcg policy

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✨ SYNOPSIS ✨

int blkcg_policy_register (struct blkcg_policy *pol );

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🫶 ARGUMENTS 🫶

• pol — the blkcg policy you’re registering, no cap.

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🌸 DESCRIPTION 🌸

okay so the whole point: this registers pol with the blkcg core. that’s the job. ✨

it might sleep 😴, so like… be normal about that. also heads up: pol may be modified on successful registration, so don’t clutch your struct too hard, bestie.

it returns 0 on success and -errno on failure. slay. 💅

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🔥 SEE ALSO 🔥

Kernel file: ./block/blk-cgroup.c — go read the source, it’s giving main character energy. 🌈

• 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_deactivate_policy(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)

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byeee 💖 source/version: ./block · date: October 2026. mwah 🫶