rpcrdma_rep_put(9)

📦 version 7.3.1, in nixpkgs unstable

💅 rpcrdma_rep_put(9) — from the Kernel API Manual, bestie

okay so like, welcome to the group chat, this is rpcrdma_rep_put, and honestly? she's a little cleanup queen and we stan her for it 🧹✨

🌸 NAME 🌸

rpcrdma_rep_put — release that rpcrdma_rep right back to the free list, no cap

🦋 SYNOPSIS 🦋

void rpcrdma_rep_put (struct rpcrdma_buffer *buf , struct rpcrdma_rep
*rep );

like, that's the whole signature. short. iconic. does exactly one thing. periodt 💅

🎀 ARGUMENTS 🎀

  • buf — the buffer pool, aka where all the reps hang out 🫶
  • rep — the rep we're releasing, bye bestie 👋

✨ DESCRIPTION ✨

so here's the tea ☕ — the rep has this transient association with an rpc_rqst, right? it gets established by rpcrdma_reply_handler, and this function is where it gets torn down. and the whole point?? that association must not survive onto rb_free_reps. literally must not. not even a little 🚫

why, you ask? because rpcrdma_post_recvs pulls reps from the free list to re-post them, and if a free-listed rep had a non-NULL rr_rqst on it, that would imply the rep is still referenced by a req. and that's a whole mess we are not doing today 🙈

so yeah, clean up the association before she goes back on the free list. vibe check passed, everybody goes home happy 💖

🔥 SEE ALSO 🔥

Kernel file ./net/sunrpc/xprtrdma/verbs.c — and the whole extended friend group:

and that's the whole page!! 🎉 this little icon lives in ./net/sunrpc/xprtrdma, the manual is dated October 2026, and it's brought to you by the Kernel API Manual — mwah, love u, go free those reps responsibly 💜🍓🧚

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