rvt_map_mr_sg(9)

📦 version 7.3.1, in nixpkgs unstable

✨ rvt_map_mr_sg(9) ✨

okay bestie, so this is a page straight out of the Kernel API Manual — the rvt_map_mr_sg entry, to be exact 💅. Let's get into it.

🌸 NAME 🌸

rvt_map_mr_sg — map that sg list and set it to the memory region, periodt 🫶

✨ SYNOPSIS ✨

int rvt_map_mr_sg (struct ib_mr *ibmr , struct scatterlist *sg , int
sg_nents , unsigned int *sg_offset );

🎀 ARGUMENTS 🎀

  • ibmr — the memory region. that's the whole point, she's the main character 💖
  • sg — the dma mapped scatterlist, aka the list itself
  • sg_nents — number of entries in sg (count 'em)
  • sg_offset — offset in bytes into sg, so like... where you're starting from 🦋

👑 DESCRIPTION 👑

okay so what she actually does: she overwrites the rvt_mr length with the mr length that ib_sg_to_pages calculated. that's it, that's the whole vibe — no cap 🔥

💜 RETURN 💜

she returns the number of sg elements mapped to the memory region — literally that number, nothing sneaky 🌈

🧚 SEE ALSO 🧚

the whole friend group, in Kernel file ./drivers/infiniband/sw/rdmavt/mr.c:

ngl bestie, nineteen cross-references is a lot of reading, but you got this 🙈💪

⭐ that's the page! sourced from ./drivers/infiniband/sw/rdmavt, dated October 2026 — mwah, go slay your kernel dev era 👑💅🍓

📦 where this page comes from