blk_execute_rq_nowait(9)

💅 blk_execute_rq_nowait — Kernel API Manual, bestie edition ✨

okay so welcome to the blk_execute_rq_nowait(9) page, straight out of the Kernel API Manual, and honestly? it's a little baddie. it does ONE thing and it does it without waiting around, which is very main character of it. let's get into it 🎀

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✨ NAME ✨

blk_execute_rq_nowait — insert a request to I/O scheduler for execution 💫

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🦋 SYNOPSIS 🦋

void blk_execute_rq_nowait (struct request *rq , bool at_head );

like, that's the whole signature. two args. no return value. she's void, she's confident, she's not giving you anything back. 👑

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🌸 ARGUMENTS 🌸

• rq — the request to insert 🫶 (yes, the actual request struct, fully prepped and ready to go, no thoughts just vibes)
• at_head — insert request at head or tail of queue ⭐ this is your lil toggle: head or tail, you decide, you're the CEO of queue placement

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💖 DESCRIPTION 💖

so what she does: she takes a fully prepared request and inserts it at the back of the I/O scheduler queue for execution. that's the job. that's the assignment. and the "nowait" in her name? not a drill — she does not wait for completion. she drops it off and dips. 🏃‍♀️💨

like, imagine handing your friend a fully assembled ikea shelf and being like "okay build it whenever, i'm leaving" — that's the energy. ✨

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💀 NOTE 💀

real talk: this function will invoke done directly if the queue is dead. 💀 no queue? no problem? well — problem, but she handles it by calling done right then and there. just so you know, bestie. 🙈

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🌈 SEE ALSO 🌈

the whole friend group, and they're all in the kernel file ./block/blk-mq.c:

• blk_mq_wait_quiesce_done(9)
• blk_mq_quiesce_queue(9)
• blk_update_request(9)
• blk_mq_complete_request(9)
• blk_mq_start_request(9)
• blk_execute_rq(9) — the waiting version, if you're the patient type 🧚
• blk_mq_delay_run_hw_queue(9)
• blk_mq_run_hw_queue(9)
• blk_mq_run_hw_queues(9)
• blk_mq_delay_run_hw_queues(9)
• blk_mq_request_bypass_insert(9)
• blk_mq_try_issue_directly(9)
• blk_mq_submit_bio(9)
• blk_insert_cloned_request(9)
• blk_rq_unprep_clone(9)
• blk_rq_prep_clone(9)
• blk_mq_destroy_queue(9)

go read them all, iykwyk 💅

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and that's the page!! 🎀 source ./block, version dated October 2026, page blk_execute_rq_nowait(9) — slay, bye bestie, go insert some requests 🔥👑💜