amdgpu_devic...k_block_size(9)

📦 version 7.3.1, in nixpkgs unstable

💅 amdgpu_device_check_block_size — Kernel API Manual teaser, bestie

okay so this one's from the Kernel API Manual (yes, that's the manual name, we're fancy now 💅) and the page title got truncated real cute as amdgpu_devic...k_block_size(9) — the actual function is amdgpu_device_check_block_size, and it's literally just here to validate the vm block size. tiny function, big vibes. 🎀

✨ NAME ✨

amdgpu_device_check_block_size — validate the vm block size 🫶

🌸 SYNOPSIS 🌸

void amdgpu_device_check_block_size (struct amdgpu_device *adev );

no return value, no drama, it just does its little check and dips ✨

🦋 ARGUMENTS 🦋

  • adev — an amdgpu_device pointer. that's it. that's the whole argument. she's low maintenance 💅

💖 DESCRIPTION 💖

so basically this function validates the vm block size specified via module parameter — like a vibe check, but for your VM config, no cap 🔥

the vm block size defines the number of bits in the page table versus the page directory. here's the math bestie, and it's giving very demure:

  • a page is 4KB, so we have 12 bits offset
  • minimum 9 bits go in the page table
  • and the remaining bits live in the page directory 🧚

so yeah, it's just checking that your numbers actually add up. iconic behavior honestly 👑

👑 SEE ALSO 👑

also the source lives in the kernel file ./drivers/gpu/drm/amd/amdgpu/amdgpu_device.c — go say hi 🫶

and now, the extended fam (yes there are a LOT of them, the amdgpu device files are one big beautiful group chat 💀):

like I said. one big group chat. iykyk 😭💜

ok that's the whole page bestie, go validate some block sizes, slay 💅✨

sign-off szn: this little beauty lives in ./drivers/gpu/drm/amd/amdgpu, dated October 2026, and the header/footer both read amdgpu_devic...k_block_size(9) — yeah the truncation ate and left no crumbs 🍓 bye!! 🎀

📦 where this page comes from