drm_mm_insert_node_in_range(9)

📦 version 7.3.1, in nixpkgs unstable

💅 drm_mm_insert_node_in_range(9) — the Kernel API Manual, bestie edition

okay so this is a page from the Kernel API Manual, and the function we're obsessing over today is drm_mm_insert_node_in_range(9). Yes it's a long name, no we're not shortening it, she earned every character. 🎀

✨ NAME ✨

drm_mm_insert_node_in_range — ranged search for space and insert @node

Literally: you go looking for a hole in a range, and you put your node in it. That's the whole vibe. 🦋

🌸 SYNOPSIS 🌸

int drm_mm_insert_node_in_range (struct drm_mm * const mm , struct
       drm_mm_node * const node , u64 size , u64 alignment , unsigned long
       color , u64 range_start , u64 range_end , enum drm_mm_insert_mode mode
       );

she takes eight arguments. eight!! main character energy fr fr 👑

💖 ARGUMENTS 💖

  • mm — the drm_mm you're allocating from. your source of truth, your supply closet, your entire personality for the duration of this call 🫶
  • node — a preallocated node that you hand over to get inserted. you bring the node, she brings the hole placement. teamwork!
  • size — size of the allocation. how much room your node needs 💅
  • alignment — alignment of the allocation. everyone's gotta line up on the right boundary, no cap
  • color — opaque tag value to use for this node. opaque!! meaning the function doesn't care what it means, it's just your little ribbon 🎀
  • range_start — start of the allowed range for this node. this is the "no earlier than" boundary ⭐
  • range_end — end of the allowed range for this node. and this is the "no later than" boundary 🌈
  • mode — fine-tune the allocation search and placement. the knobs, the dials, the little levers you get to fiddle with 🔥

😭 DESCRIPTION 😭

The preallocated node must be cleared to 0.

like, actually. zero it out. don't skip this step, don't "get to it later", don't manifest good results. the node must be cleared to 0 before you call. that's the entire description and honestly she said what she said 💀

🌟 RETURN 🌟

  • 0 on success 🎉
  • -ENOSPC if there's no suitable hole 😔

that's it. that's the whole return situation. no elaborate error ladder, just "worked" or "no room bestie".

ngl if you see -ENOSPC it's not a you problem, the space genuinely isn't there. she looked. she checked the range and everything. nothing suitable. respect the search.

🦋 SEE ALSO 🦋

The whole friend group, in the order they're listed:

go read all of them, i'll wait 💜

okay that's the page!! sourced from ./drivers/gpu/drm, dated October 2026, and per the footer it's all about drm_mm_insert_node_in_range(9) — same girl, same month, same directory. slay, goodbye, insert responsibly ✨💖

📦 where this page comes from