Linux-for-Rust or Rust-for-Linux [LWN.net]

Linux-for-Rust or Rust-for-Linux

Posted Aug 31, 2024 3:30 UTC (Sat) by asahilina (subscriber, #166071)
In reply to: Linux-for-Rust or Rust-for-Linux by jgg
Parent article: Rust-for-Linux developer Wedson Almeida Filho drops out

> The point, as pbonzini elaborated on, is a lack of "killer use case" to motivate RH to seriously turn on kernel Rust in RHEL10. AGX will not alter RH's plans.

You are aware that the AGX driver is in fact the reason why Fedora is turning on Rust support in upstream kernels, right? I'm pretty sure that is doing more to push RHEL to eventually do the same than anything else, today.

https://gitlab.com/cki-project/kernel-ark/-/merge_request...

Neal is part of the Fedora Asahi SIG.

(Won't comment on your insistence on the "toy" designation since other replies have already done so.)

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Linux-for-Rust or Rust-for-Linux

Posted Aug 31, 2024 7:38 UTC (Sat) by airlied (subscriber, #9104) [Link] (3 responses)

Red Hat will not turn on rust prior to nova if I had to guess, I'm not seeing any other motivator, I don't see any other motivator.

Don't confuse Fedora, CentOS or ARK with Red Hat here. RHEL is the boss level here, but I don't really care about that, I only care about getting things upstream lined up.

I think a lot of the complaints about rust will evolve away once there is an interesting in-tree consumer, toolchain versions will stabilise, better toolchain support for things upstream needs etc

Linux-for-Rust or Rust-for-Linux

Posted Aug 31, 2024 11:11 UTC (Sat) by Conan_Kudo (subscriber, #103240) [Link] (2 responses)

No. Rust is getting turned on because drm_panic is written in Rust. I started working on this for enablement because of AGX, but we need it turned on ASAP because drm_panic is approved for Fedora Linux 42.

Nova is on literally nobody's radar right now because it doesn't exist beyond scaffold. There is no code that does anything yet, to the best of my knowledge, and there will not be any for a long while.

Linux-for-Rust or Rust-for-Linux

Posted Aug 31, 2024 12:10 UTC (Sat) by airlied (subscriber, #9104) [Link] (1 responses)

DRM panic in Fedora is not a Red Hat commitment to rust in RHEL. I think directly said not to confuse Fedora and Red Hat here.

Linux-for-Rust or Rust-for-Linux

Posted Aug 31, 2024 12:31 UTC (Sat) by Conan_Kudo (subscriber, #103240) [Link]

Based on the conversations I've had with the RHEL kernel team so far, the main blocker for RHEL is the lack of modversions support for Rust, which is being worked on. I do think it'll get enabled before Nova is in a useful state, because there are other little drivers in-tree where there are C and Rust versions and the Rust versions are better than the C versions.