kvmemdup(9)

📦 version 7.3.1, in nixpkgs unstable

💖 kvmemdup(9) 💖

okay so real talk, bestie, this is a page from the Kernel API Manual, and it's about kvmemdup — the "copy this chunk of memory for me please" girlie. she's giving allocator energy and we're obsessed. let's get into it ✨

🌸 NAME 🌸

kvmemdup — duplicate region of memory. that's it, that's the whole vibe. she copies a region of memory. periodt.

🦋 SYNOPSIS 🦋

void * kvmemdup (const void *src , size_t len , gfp_t gfp );

like, look at her. three arguments. returns a void *. so clean, so iconic 💅

🎀 ARGUMENTS 🎀

  • src — the memory region you wanna duplicate. the original. the main character, if you will 👑
  • len — how long that memory region is. gotta tell her the length or she's just guessing, and we don't guess, we know ✨
  • gfp — the GFP mask to use. that's the flags she gets to allocate with, no cap 🫶

⭐ RETURN ⭐

she hands you back a newly allocated copy of src, or NULL if something goes wrong 😭 — that's the error case, so like, check it, bestie, fr fr.

⚠️ important vibe check: the result may be not physically contiguous. do not assume it is. she said what she said 💀

and when you're done with it? free it with kvfree. don't just leave it hanging, that's rude and also a leak 🙈

🌈 SEE ALSO 🌈

kernel file ./mm/util.c, plus this whole friend group right here — go say hi 👋💖

and that's the whole page, bestie 🧚 ty for coming to my ted talk. this one lives in the ./mm directory and it's dated October 2026 — so like, future girlie behavior, we love to see it 💜✨ slay!

📦 where this page comes from