ttm_bo_alloc_resource(9)

📦 version 7.3.1, in nixpkgs unstable

💖 ttm_bo_alloc_resource(9) 💖

okay bestie, this one's from the Kernel API Manual and it's literally about getting your buffer object a place to live. let's get into it 🫶

✨ NAME ✨

ttm_bo_alloc_resource — Allocate backing store for a BO

🌸 SYNOPSIS 🌸

int ttm_bo_alloc_resource (struct ttm_buffer_object *bo , struct
ttm_placement *placement , struct ttm_operation_ctx *ctx , bool
force_space , struct ttm_resource **res );

🎀 ARGUMENTS 🎀

  • bo — Pointer to a struct ttm_buffer_object of which we want a resource for. like, this is the BO in question, the main character 👑
  • placement — Proposed new placement for the buffer object. where we're thinking of putting it ✨
  • ctx — if and how to sleep, lock buffers and alloc memory. yes it's "if", not just "how" — the ctx decides both 🙈
  • force_space — If we should evict buffers to force space. lowkey ruthless but sometimes you gotta 💅
  • res — The resulting struct ttm_resource. this is where the answer ends up, bestie

🦋 DESCRIPTION 🦋

Allocates a resource for the buffer object pointed to by bo, using the placement flags in placement, potentially evicting other buffer objects when force_space is true.

This function may sleep while waiting for resources to become available. so yeah, heads up — it can nap on you 😴 no cap.

🔥 RETURN 🔥

  • -EBUSY: No space available (only if no_wait == true).
  • -ENOSPC: Could not allocate space for the buffer object, either due to fragmentation or concurrent allocators.
  • -ERESTARTSYS: An interruptible sleep was interrupted by a signal.

it's giving "here's exactly which error you got, and why" and honestly? obsessed 💀

🌈 SEE ALSO 🌈

Kernel file ./drivers/gpu/drm/ttm/ttm_bo.c

like a whole friend group of functions, fr fr 💜

ok that's the whole page bestie, go allocate something iconic 🧚

this cutie came from ./drivers/gpu/drm/ttm, dated October 2026 — slay, periodt 💅🎀

📦 where this page comes from