xdr_shrink_pagelen(9)

📦 version 7.3.1, in nixpkgs unstable

✨ xdr_shrink_pagelen(9) ✨

okay so bestie, we're in the Kernel API Manual today and the star of the show is xdr_shrink_pagelen — it's giving kernel-internals main character energy, and honestly? obsessed 💅

🌸 NAME 🌸

xdr_shrink_pagelen — shrinks buf->pages to @len bytes 🎀

🦋 SYNOPSIS 🦋

unsigned int xdr_shrink_pagelen (struct xdr_buf *buf , unsigned int len
);

💖 ARGUMENTS 💖

  • buf — an xdr_buf, that's the vibe 🫶
  • len — the new page buffer length, like the new size bestie, that's the whole point ✨

🔥 DESCRIPTION 🔥

The way this function just... trims buf->pages down to len bytes, no cap. 🎀

And listen — the extra data does not just get yeeted into the void 😭 it's not lost at all, bestie. Instead it gets moved into buf->tail. Iconic relocation behaviour honestly.

It returns the actual number of bytes moved. So like, that's your receipt. 💅

💀 SEE ALSO 💀

Kernel file ./net/sunrpc/xdr.c — and the whole extended friend group, fr fr:

and that's the whole page, bestie 🧚💜 this one came out of ./net/sunrpc, dated October 2026, and it's literally dedicated to you and your page-shrinking journey 🍓✨ slay 🎀

📦 where this page comes from