panthor_heap_return_chunk(9)

📦 version 7.3.1, in nixpkgs unstable

💖 panthor_heap_return_chunk — the "oops, give it back" era 💖

okay so bestie, we're in the panthor_heap_return_chunk(9) page, from the Kernel API Manual. yes it's giving kernel-internals, yes it's niche, no you don't have to be scared, i got you 🫶

✨ NAME ✨

panthor_heap_return_chunk — hand back a heap chunk you ended up not using. like returning a library book unread but, y'know, GPU memory. iconic behaviour honestly 🎀

🌸 SYNOPSIS 🌸

int panthor_heap_return_chunk (struct panthor_heap_pool *pool , u64
heap_gpu_va , u64 chunk_gpu_va );

like, it takes three things and it returns an int, that's the whole vibe ✨

🦋 ARGUMENTS 🦋

  • pool — the pool this heap belongs to. its home base, its found family 💜
  • heap_gpu_va — the GPU address of the heap context. the u64 that tells you which heap we're talking about 👑
  • chunk_gpu_va — the chunk VA to return. this is the one going back to the store, no cap 🛍️

🌈 DESCRIPTION 🌈

okay so this is a very specific situation and honestly it's kind of a tragedy. 😭

this function is used when a chunk allocated with panthor_heap_grow couldn't be linked to the heap context through the FW interface — and the reason it couldn't? because the group requesting the allocation was scheduled out in the meantime. like it literally got benched mid-request. 💀

so now you've got a chunk just... floating there. allocated but unlinked. nobody's using it, nothing points at it. and that's where panthor_heap_return_chunk comes in to clean up the whole mess. main character energy for a cleanup function, honestly 🔥

🧚 SEE ALSO 🧚

ngl the whole family of panthor heap functions is right there, so go read them too — bestie homework fr fr 📚

and that's the page, babes 💜 sourced straight from ./drivers/gpu/drm/panthor and dated October 2026 — yes, the future, we're ahead of schedule 👑✨

📦 where this page comes from