BEbenatkin·Dec 28, 2025
In this comment someone tries to justify its design, citing a lwn article: https://github.com/rex-rs/rex/issues/2#issuecomment-26965339...
In Rex is a safe kernel extension framework that allows Rust in the place of eBPFrex-rs
rex
Rust2025–2025
rex-rs / rex
rex
Rex is a safe and usable kernel extension framework that allows loading and executing Rust kernel extension programs in the place of eBPF.
3Distinct people
3Mentions
0Explicit recommenders
569GitHub stars
What to know before exploring
What it is
Rex is a safe and usable kernel extension framework that allows loading and executing Rust kernel extension programs in the place of eBPF.
GitHub
Where it is used
No documented product use has been verified yet.
What people are saying
No recommendation phrase was found in the indexed comments.
No classified warning is attached to this page. Read the discussions before treating silence as approval.
Also in these discussions
No other repository is repeatedly linked in the same discussions.
This week on Hacker News
Nov 7–Nov 14 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/14/2026, 1:49:46 PM UTC.
No direct repository links were found in the indexed HN discussions over the past seven days. Older discussions are available below.
Mentions over time
HN mentions by week3 dated mentions
Observed mentions: 2025-07-11 23:47:32 UTC to 2025-12-28 06:46:17 UTC. Weeks start Monday, UTC.
Counts come from the repository’s dated source evidence. Index cutoff: 2026-11-02 08:16:59 UTC.
View mention counts and date ranges
| Period | Start (UTC) | End (exclusive, UTC) | Mentions | Submissions | Comments |
|---|---|---|---|---|---|
| Jul 7 | 2025-07-07 00:00:00 UTC | 2025-07-14 00:00:00 UTC | 1 | 0 | 1 |
| Jul 14 | 2025-07-14 00:00:00 UTC | 2025-07-21 00:00:00 UTC | 0 | 0 | 0 |
| Jul 21 | 2025-07-21 00:00:00 UTC | 2025-07-28 00:00:00 UTC | 0 | 0 | 0 |
| Jul 28 | 2025-07-28 00:00:00 UTC | 2025-08-04 00:00:00 UTC | 0 | 0 | 0 |
| Aug 4 | 2025-08-04 00:00:00 UTC | 2025-08-11 00:00:00 UTC | 0 | 0 | 0 |
| Aug 11 | 2025-08-11 00:00:00 UTC | 2025-08-18 00:00:00 UTC | 0 | 0 | 0 |
| Aug 18 | 2025-08-18 00:00:00 UTC | 2025-08-25 00:00:00 UTC | 0 | 0 | 0 |
| Aug 25 | 2025-08-25 00:00:00 UTC | 2025-09-01 00:00:00 UTC | 0 | 0 | 0 |
| Sep 1 | 2025-09-01 00:00:00 UTC | 2025-09-08 00:00:00 UTC | 0 | 0 | 0 |
| Sep 8 | 2025-09-08 00:00:00 UTC | 2025-09-15 00:00:00 UTC | 0 | 0 | 0 |
| Sep 15 | 2025-09-15 00:00:00 UTC | 2025-09-22 00:00:00 UTC | 0 | 0 | 0 |
| Sep 22 | 2025-09-22 00:00:00 UTC | 2025-09-29 00:00:00 UTC | 0 | 0 | 0 |
| Sep 29 | 2025-09-29 00:00:00 UTC | 2025-10-06 00:00:00 UTC | 0 | 0 | 0 |
| Oct 6 | 2025-10-06 00:00:00 UTC | 2025-10-13 00:00:00 UTC | 0 | 0 | 0 |
| Oct 13 | 2025-10-13 00:00:00 UTC | 2025-10-20 00:00:00 UTC | 0 | 0 | 0 |
| Oct 20 | 2025-10-20 00:00:00 UTC | 2025-10-27 00:00:00 UTC | 0 | 0 | 0 |
| Oct 27 | 2025-10-27 00:00:00 UTC | 2025-11-03 00:00:00 UTC | 0 | 0 | 0 |
| Nov 3 | 2025-11-03 00:00:00 UTC | 2025-11-10 00:00:00 UTC | 0 | 0 | 0 |
| Nov 10 | 2025-11-10 00:00:00 UTC | 2025-11-17 00:00:00 UTC | 0 | 0 | 0 |
| Nov 17 | 2025-11-17 00:00:00 UTC | 2025-11-24 00:00:00 UTC | 0 | 0 | 0 |
| Nov 24 | 2025-11-24 00:00:00 UTC | 2025-12-01 00:00:00 UTC | 0 | 0 | 0 |
| Dec 1 | 2025-12-01 00:00:00 UTC | 2025-12-08 00:00:00 UTC | 0 | 0 | 0 |
| Dec 8 | 2025-12-08 00:00:00 UTC | 2025-12-15 00:00:00 UTC | 0 | 0 | 0 |
| Dec 15 | 2025-12-15 00:00:00 UTC | 2025-12-22 00:00:00 UTC | 0 | 0 | 0 |
| Dec 22 | 2025-12-22 00:00:00 UTC | 2025-12-29 00:00:00 UTC | 2 | 1 | 1 |
What Hacker News says
3 sourcesRex is a safe kernel extension framework that allows Rust in the place of eBPF
146 points · Open discussionRex Kernel Extensions: a safe and usable kernel extension framework that allows loading and executing Rust kernel extension programs in the place of eBPF
https://github.com/rex-rs/rex
Abstract:
"Safe kernel extensions have gained significant traction, evolving from simple packet filters to large, complex programs that customize storage, networking, and scheduling. Existing kernel extension mechanisms like eBPF rely on in-kernel verifiers to ensure safety of kernel extensions by static verification using symbolic execution. We identify significant usability issues—safe extensions being rejected by the verifier—due to the language-verifier gap, a mismatch between developers’ expectation of program safety provided by a contract with the programming language, and the verifier’s expectation.
We present Rex, a new kernel extension framework tha
Read the rest
t closes the language-verifier gap and improves the usability of kernel extensions in terms of programming experience and maintainability. Rex builds upon language-based safety to provide safety properties desired by kernel extensions, along with a lightweight extralingual runtime for properties that are unsuitable for static analysis, including safe exception handling, stack safety, and termination. With Rex, kernel extensions are written in safe Rust and interact with the kernel via a safe interface provided by Rex’s kernel crate. No separate static verification is needed. Rex addresses usability issues of eBPF kernel extensions without compromising performance."