blkcg_add_delay(9)

💅 blkcg_add_delay(9) — a Kernel API Manual moment

okay so bestie, welcome to the Kernel API Manual page for blkcg_add_delay(9), and honestly? it's giving "tiny function, big responsibilities" energy. let's get into it 🫶

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✨ NAME ✨

blkcg_add_delay — add delay to this blkg ✨

like, literally that. it adds delay. to this blkg. no notes. 💅

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🌸 SYNOPSIS 🌸

void blkcg_add_delay (struct blkcg_gq *blkg , u64 now , u64 delta );

returns void btw, so it's not gonna hand you back a value — it just does the thing and dips 😌

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🎀 ARGUMENTS 🎀

• blkg — the blkg of interest 👀 (this is the one we're charging, bestie)
• now — the current time, measured in nanoseconds ⏱️
• delta — how many nanoseconds of delay we're adding 🫶

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💖 DESCRIPTION 💖

so the whole vibe here is: you charge delta to the blkg's current delay accumulation. that's it. that's the function. 🧚

and why, you ask? because this bad boy is used to throttle tasks if an I/O controller thinks we need more throttling 🔥 like, it's the mechanism that says "mm, maybe slow down a lil" — and it's lowkey iconic for it. no cap.

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🦋 SEE ALSO 🦋

the whole friend group lives in the kernel file ./block/blk-cgroup.c, and honestly they all ate 👑

• 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_register(9)
• blkcg_policy_unregister(9)
• blkcg_maybe_throttle_current(9)
• blkcg_schedule_throttle(9)
• blkg_tryget_closest(9)
• bio_associate_blkg_from_css(9)
• bio_associate_blkg(9)
• bio_clone_blkg_association(9)

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and that's the whole page, bestie 💜 ngl it was short but it served. this icon of a manpage comes to you from ./block, version October 2026, filed under blkcg_add_delay(9) — mwah, stan it, periodt 🎀💅✨