Linux 5.12 Coming In At Around 28.8 Million Lines, AMDGPU Driver Closing In On 3 Million

[torsionbar28]

Hm... AMD's driver has quite a lot of lines of code, but still sucks for compute support and many features available in the Windows driver have not even been implemented.

Ok. The only alternative is Nvidia. Do we want to do a comparison with the state of Nouveau driver? I don't think you want to go there, lol.

[doomie]

More than 10% of the kernel is devoted to one company!!??

a lot of automatically generated lines for GPU registers... nature of the beast. plus graphics in general seem a messy IP/architecture/ecosystem compared to other hardware...

[bridgman]

Our header files also used to be quite a bit smaller before community developers asked us to include header info for all of the registers we could, not just the registers that the driver was currently using.

BTW the register header files are not auto-generated in the generally accepted sense (a small amount of code goes through some kind of processing to produce a larger amount of code), but rather are extracted from our HW source code.

[StarterX4]

And no code in Rust yet.

[sn99]

And no code in Rust yet.

It won't ever be, Rust does not have a hard coded ABI, C is just better for OS-dev.

[Almindor]

It won't ever be, Rust does not have a hard coded ABI, C is just better for OS-dev.

With Linux you'd have to use `#[repr(C)]` either way which is of course a stable C compatible ABI. Rust itself does not stabilize its native representations yet but it'll come one day. It'd be of no use with the Linux kernel tho.

Rust purely from the language perspective is vastly superior to C for OS-dev. There are still some rough edges but it's already way ahead.