amdgpu_amdk...ve_mem_limit(9)

📦 version 7.3.1, in nixpkgs unstable

💖 amdgpu_amdkfd_reserve_mem_limit — the Kernel API Manual era ✨

okay so bestie, we're in the Kernel API Manual rn and today's main character is amdgpu_amdkfd_reserve_mem_limit(9). yes the header is literally amdgpu_amdk...ve_mem_limit(9) and yes they truncated it, don't @ me, that's just how the page shipped. no cap.

✨ NAME ✨

amdgpu_amdkfd_reserve_mem_limit — it decreases the available memory by the size of the buffer. that's the whole vibe. shrinking the bag, but make it kernel 💅

🎀 SYNOPSIS 🎀

int amdgpu_amdkfd_reserve_mem_limit (struct amdgpu_device *adev ,
uint64_t size , u32 alloc_flag , int8_t xcp_id );

🦋 ARGUMENTS 🦋

  • adev — the device that the allocated BO belongs to 🫶 like, whose BO is this anyway
  • size — the size of the buffer, in bytes, that's encapsulated by B0. it should be equivalent to amdgpu_bo_size(BO) — yes literally that, keep them matching bestie 🎯
  • alloc_flag — the flag used in allocating a BO "as noted above" (iykyk, it's the flag, use it 💀)
  • xcp_id — xcp_id is used to get the xcp from the xcp manager! one xcp is managed as one compute node in the driver for the app 👑 so like, this little number is doing a lot of work fr fr

🔥 RETURN 🔥

it returns -ENOMEM in case of error, and ZERO otherwise. so yeah: bad news = -ENOMEM, everything slayed = ZERO ✨

💜 SEE ALSO 💜

kernel file ./drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c — that's the home base bestie 🏠

and the whole friend group (they all go together, periodt):

that's the whole page babes, nothing skipped, every single flag and function name intact 🧚

🌸 okay that's a wrap!! this lil gem lives in ./drivers/gpu/drm/amd/amdgpu, it's dated October 2026, and the page itself answers to amdgpu_amdk...ve_mem_limit(9). mwah 💋 go reserve some memory responsibly bestie, ily 🫶💖

📦 where this page comes from