This post comes uncomfortably close to plagiarizing https://thebuild.com/blog/2026/04/23/preempt_none-is-dead-yo..., which it cites as a source; almost all the technical explanation is in there and some of the wording is extremely similar. Compare, e.g., "What Linux 7.0 actually changed" in Pettus's post to "What Is Preemption?" in this one. I think this link should have been to Pettus's post instead.

That post comes uncomfortably close to how Opus writes this kind of prose. It's a good idea to acknowledge all stakeholders.

I used that post as a source yes, and it’s stated explicitly but it’s not the only one. One section in particular is similar since we both present the different preemption modes. However, both audiences are different. thebuild.com has an audience composed of PostgreSQL enthusiasts (if not experts) and I don’t. So a significant part of my post was about explaining things from first principles (what’s a page, a TLB, a spinlock, etc.). I explain way more “basic” things and he goes beyond me in terms of how to cope with the problem. I don’t think the posts are closed.

After your comment I went to original and it really looks like ai assisted rewrite with prompt like “give more explanations about basic concepts”…