this post was submitted on 30 Aug 2023
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Luis Chamberlain sent out the modules changes today for the Linux 6.6 merge window. Most notable with the modules update is a change that better builds up the defenses against NVIDIA's proprietary kernel driver from using GPL-only symbols. Or in other words, bits that only true open-source drivers should be utilizing and not proprietary kernel drivers like NVIDIA's default Linux driver in respecting the original kernel code author's intent.

Back in 2020 when the original defense was added, NVIDIA recommended avoiding the Linux 5.9 for the time being. They ended up having a supported driver several weeks later. It will be interesting to see this time how long Linux 6.6+ thwarts their kernel driver.

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[–] [email protected] 53 points 2 years ago (4 children)

Riddle me this, why is there such a thing as proprietary drivers for anything? Especially consumer facing products like this?

Don't you want anyone and anything using your product in any situation? Help me understand NVIDIA's bit with this?

[–] [email protected] 46 points 2 years ago (2 children)

Driver code might expose some underlying secret sauce they're using in the hardware. That's the justification they always used to give, at any rate. At this point, though, it's probably some code they've inherited from an acquisition that has a bunch of legal encumbrance stopping it from being open sources.

[–] [email protected] 19 points 2 years ago* (last edited 2 years ago) (1 children)

If they have to rely on obscuring stuff on their user side to keep their secret sauce, I'd say they're bad at it.

This is coming from someone who deals with APIs for living.

[–] [email protected] 20 points 2 years ago

They don't have to do it well, just enough to satisfy the lawyers.

[–] [email protected] 18 points 2 years ago* (last edited 2 years ago) (1 children)

Likely a combination of 4 things:

  1. They have third party firmware in their blobs that they are under NDA regarding the source code.

  2. They believe in the source code is a large part of their success and don't want to reveal it.

  3. They believe giving out the source code will allow many inferior variants of the software, impacting their brand.

  4. Control; the more source code they have in mesa the more of their code can be rejected by mesa. Keeping their stuff as blobs allows them to put in whatever hacks they want.

[–] [email protected] 4 points 2 years ago* (last edited 2 years ago) (1 children)
  1. They can open their code without merging into mesa

  2. They don't want you to use "old" GPUs

[–] [email protected] 1 points 2 years ago (1 children)

Sure but why open their code without getting the integration benefits?

[–] [email protected] 3 points 2 years ago* (last edited 2 years ago)
  1. Getting to use GPL-only symbols
  2. Still much easier for distros
  3. Example of drivers

And again we are talling about code not being rejected as main goal.

[–] [email protected] 1 points 2 years ago

They don't want you to see the "if benchmark_xyz { do less work }" blocks of code.

[–] [email protected] -2 points 2 years ago (6 children)

I assume nVidia have licensed other code that they don't have the rights to distribute the source code for.

I get what the GPL fans want here, but it's just going to lead to a gimped driver, no driver, or an even larger shim between the open and closed source bits. The Linux market is too small for nVidia to care.

[–] [email protected] 26 points 2 years ago (1 children)

The Linux market is too small for nVidia to care.

The Linux gaming market is too small for Nvidia to care, but the GPU computing market isn't.

[–] [email protected] -3 points 2 years ago (2 children)

So we can add "use an older kernel" and "use a modified kernel with that protection removed" to the list of options.

[–] [email protected] 10 points 2 years ago* (last edited 2 years ago) (1 children)

Using an older kernel isn't a long-term solution. And according to the kernel devs, either using and older kernel in that way or modifying the kernel to remove these protections still violates the license even if it bypasses the technical protections.

(I'm guessing Nvidia will keep shimming and rely on either not being sued or winning the lawsuit.)

[–] [email protected] 3 points 2 years ago

As long as they get support for it. Big corps don't buy anything without 7 layers of scapegoats to point at.

[–] [email protected] 19 points 2 years ago* (last edited 2 years ago) (2 children)

The Linux community is literally Nvidia's biggest market. The current Linux market share in data centers is currently estimated to be 77%.

[–] [email protected] -5 points 2 years ago

Sure but they don't play 3d video games do they?

[–] [email protected] 18 points 2 years ago (1 children)

The Linux market is massive for Nvidia. Nobody is using Windows for ML and everybody is using Nvidia for ML.

[–] [email protected] 10 points 2 years ago* (last edited 2 years ago)

With GPUs being used for AI stuff and all sane people using Linux for servers, no, Linux market isn't small at all for Nvidia.

[–] [email protected] 3 points 2 years ago

The Linux market is too small for nVidia to care

I'll fix it for you: "The Linux gaming market"

Linux AI market is their bread, butter and red caviar. Shim itself is enough proof they care.