newseg(9)

🌸 newseg(9) 🌸

okay bestie, welcome to the Kernel API Manual — yes, the Kernel API Manual, we're in the big leagues now 💅 this one's short and sweet but it's lowkey important, so pay attention 🫶

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✨ NAME ✨

newseg — it literally creates a new shared memory segment, that's the whole vibe 🎀

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✨ SYNOPSIS ✨

int newseg (struct ipc_namespace *ns , struct ipc_params *params );

that's it. that's the whole call. two args, one int coming back at you, iconic 💖

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✨ ARGUMENTS ✨

• ns — the namespace, bestie. that's the struct ipc_namespace * right there 🌈
• params — a ptr to the structure that contains key, size and shmflg — like, all three of them live in there, so hand over the pointer and let the function do its thing 🦋

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✨ DESCRIPTION ✨

okay so here's the one thing you cannot skip, and I mean it, no cap:

Called with shm_ids.rwsem held as a writer. 🔥

like, you gotta already be holding it as a writer before this runs — that's the contract, that's the vibe check, don't come in without it 😭 it's giving "read the room before you walk in" energy fr fr.

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✨ SEE ALSO ✨

• Kernel file ./ipc/shm.c — go read it, it's the main character of this whole story 👑

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and that's the page!! short, sweet, slays 💀✨

signing off with the deets so you have them forever: this one lives under ./ipc, dated October 2026, and the header up top is newseg(9) with the Kernel API Manual energy all over it 🎀 bye bestie, go hold that rwsem as a writer 💜