svc_recv(9)

💅 svc_recv — like, the (9) manual, bestie 💅

okay so welcome to svc_recv, straight outta the Kernel API Manual ✨ this is a kernel function, so it's section 9 energy, and it's lowkey one of those little workhorse functions that keeps your RPC service threads fed 🍓

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✨ SYNOPSIS ✨

int svc_recv (struct svc_rqst *rqstp , long timeo );

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🎀 ARGUMENTS 🎀

• rqstp — an idle RPC service thread 👑 like, this is the thread that's just chilling and waiting for something to do.
• timeo — the timeout, measured in jiffies ⏱️ and yes, 0 means an infinite timeout (no cap, no limit, she waits forever 💀).

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🦋 DESCRIPTION 🦋

So the whole vibe of this function is: receive and process the next request on any transport 💖

And ngl, the code is carefully organised — like, genuinely thought-through — so that it does not touch any cachelines in the shared svc_serv structure 😤 it only touches cachelines in the local svc_pool. that's the whole design flex, fr fr ✨

Also, important: if the timeout is 0, then the sleep will never time out 🫶 she's committed.

🌸 what it returns 🌸

• -ETIMEDOUT — if it's been idle for an extended period 😭
• -EBUSY — if there's more work to do than available threads 🙈
• 0 — otherwise 💫

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⭐ SEE ALSO ⭐

Kernel file ./net/sunrpc/svc_xprt.c 💜 and the whole friend group:

• svc_reg_xprt_class(9)
• svc_unreg_xprt_class(9)
• svc_print_xprts(9)
• svc_xprt_deferred_close(9)
• svc_xprt_received(9)
• svc_xprt_create_from_sa(9)
• svc_xprt_create(9)
• svc_print_addr(9)
• svc_xprt_enqueue(9)
• svc_reserve(9)
• svc_wake_up(9)
• svc_send(9)
• svc_xprt_close(9)
• svc_xprt_destroy_all(9)
• svc_find_listener(9)
• svc_find_xprt(9)
• svc_xprt_names(9)

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💀 reminder bestie: timeo is in jiffies, not seconds, and 0 = infinite. do not come for me if you forget.

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okay that's the whole page, mwah 💋 this iconic little entry lives in ./net/sunrpc, and the footer vibes are October 2026 with the name svc_recv(9) — periodt, that's the sign-off 🌈🎀💅