ttm_bo_wait_ctx(9)

📦 version 7.3.1, in nixpkgs unstable

💅 ttm_bo_wait_ctx(9) — like, the Kernel API Manual page you actually wanna read 🎀

okay so bestie, welcome to the <pink>Kernel API Manual</pink> entry for ttm_bo_wait_ctx ✨ it's short, it's sweet, it's giving "tiny function, very important job" energy, and we're gonna get through it together 🫶

✨ NAME ✨

ttm_bo_wait_ctx — wait for buffer idle 💤

like literally that's the whole gig. you show up, you wait for the buffer to chill out, you leave 😌

🌸 SYNOPSIS 🌸

int ttm_bo_wait_ctx (struct ttm_buffer_object *bo , struct
       ttm_operation_ctx *ctx );

it returns an int, it takes two pointers, and no we are not scared of it 💅

🦋 ARGUMENTS 🦋

  • bo — the buffer object 🧸 like, the actual thing you're waiting on. this is the main character of the call, ngl.
  • ctx — defines how to wait ⏳ it's the vibe-setter! it's the one that decides the rules of the waiting situation. iykyk.

💖 DESCRIPTION 💖

so what does it do? it waits for the buffer to be idle. that's it. that's the function. iconic behaviour honestly 👑

but here's the cute lil twist: the used timeout depends on the context — so the ctx you pass in literally controls how long this whole waiting saga goes on for. no cap, it's context-dependent, so don't come for me about the timeout length, go ask your ctx 💀

and the return values? let's get into them:

  • returns -EBUSY if the wait timed out — and yes the original page says "timed outt" with two t's, and honestly? we're keeping that, it's a whole mood 😭 (technical meaning unaffected: the wait timed out, that's a real failure case, bestie)
  • returns -ERESTARTSYS if it got interrupted by a signal 📴 like, someone knocked, the wait had to bail
  • returns zero on success ✅ slay!! we love a clean zero
⚠️ heads up: those first two are error returns, not "oopsie we'll retry" — -EBUSY means timed out and -ERESTARTSYS means a signal interrupted it. treat them accordingly, fr fr 🙈

🌈 SEE ALSO 🌈

Kernel file ./drivers/gpu/drm/ttm/ttm_bo.c — plus the whole friend group, because this function does not exist in isolation bestie, look at this roster 🔥

go read them. or don't. but they're there 💜

🎀 the sign-off 🎀

this lil masterpiece lives in ./drivers/gpu/drm/ttm, dated October 2026, and it answers to the name ttm_bo_wait_ctx(9) ⭐

okay bye bestie, go wait on that buffer, you've got this 🧚💖

📦 where this page comes from