merge_queues(9)

💅 merge_queues(9) 💅

okay so bestie, welcome to the Kernel API Manual — yes, the kernel has a manual, and yes, you're gonna read this one because it's actually kinda iconic once you get it. sit down, grab a strawberry 🍓, let's go.

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✨ NAME ✨

merge_queues — it merges the single semop queues into the global queue. that's the whole vibe. no cap. 🎀

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🦋 SYNOPSIS 🦋

void merge_queues (struct sem_array *sma );

literally one function, one argument, zero drama. we love a low-maintenance signature. 💜

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🌸 ARGUMENTS 🌸

• sma — the semaphore array. that's it, that's the whole input. she's the semaphore array, she's the main character, give her what she needs. 👑

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🔥 DESCRIPTION 🔥

so here's the tea: this function merges all the per-semaphore queues into the global queue. every single one. all of them. 💅

and like… why, you ask? because you need FIFO ordering for the pending single-sop operations when a multi-semop operation has to sleep. that's the whole reason. somebody's gotta wait their turn in line, and it's gonna be fair, and it's gonna be in order, periodt. ✨

the important nuance (ngl this part matters): only the alter operations must be moved — the const operations can just stay right where they are, chillin'. no need to drag them anywhere. 🙈

ok so to recap the lore: per-semaphore queues → merged into global queue → FIFO fairness for pending single-sop ops when a multi-semop op must sleep → only alter ops move, const ops can stay. the way that this function just does exactly one job and does it well. we stan. 🫶

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👑 SEE ALSO 👑

• the kernel file ./ipc/sem.c — the source of truth, the mothership, the origin story 🧚
• unmerge_queues(9)
• newary(9)
• wake_const_ops(9)
• do_smart_wakeup_zero(9)
• update_queue(9)
• set_semotime(9)
• do_smart_update(9)
• find_alloc_undo(9)

go read them too, bestie, iykyk. it's giving "read the whole family tree." 🌈

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⭐ and that's the page!! brought to you by the <italic>./ipc</italic> crew, dated October 2026, and we're out here doing merge_queues(9) things. slay, bye 💖💅