LWN covers a proposed Linux process-builder API that assembles a process from an empty pidfd instead of forking
- Sources: primary
- Summary: The series would give Linux a native path for posix_spawn that skips copying the parent, assembling a process from an empty pidfd. It is a proof of concept that still calls vfork internally. It had drawn one review comment since it was posted on 2026-07-16.
- Why it matters: A native process-builder path would let posix_spawn avoid the copy-on-write cost of forking a large parent.