net_ns_barrier(9)

okay bestie, welcome to net_ns_barrier(9) from the Kernel API Manual — yes, that’s the whole vibe, and we’re getting into it 💅

✨ NAME ✨

net_ns_barrier — wait until concurrent net_cleanup_work is done 🫶

🧾 SYNOPSIS 🧾

void net_ns_barrier (void );

🫶 ARGUMENTS 🫶

• void — no arguments. That’s it, zero args, iconic minimalism ✨

💖 DESCRIPTION 💖

So here’s the tea, bestie: cleanup_net runs from a work queue, and it will first remove namespaces from the global list, then run net exit functions. The order is literally the whole point 👑

Call this in the module exit path to make sure that all netns ->exit ops have been invoked before the function is removed. Like, do not skip this step, okay? It’s giving “please let the cleanup finish before we vanish” energy 😭🔥

👀 SEE ALSO 👀

Kernel file: ./net/core/net_namespace.c — go peek, bestie 💅

• net_ns_get_ownership(9)
• get_net_ns(9)
• register_pernet_subsys(9)
• unregister_pernet_subsys(9)
• register_pernet_device(9)
• unregister_pernet_device(9)

xoxo, stay hydrated and may your work queues drain cleanly 💖 — source/version: ./net/core; date: October 2026; page: net_ns_barrier(9) 🎀