virtqueue_disable_cb(9)

📦 version 7.3.1, in nixpkgs unstable

💅 virtqueue_disable_cb — disable callbacks 💅

okay so bestie, welcome to section 9 of the Kernel API Manual, where today we're looking at virtqueue_disable_cb ✨ this one's short and sweet and honestly kind of an icon for it.

🎀 NAME 🎀

virtqueue_disable_cb — disable callbacks</p>, that's it, that's the whole job 💖

✨ SYNOPSIS ✨

void virtqueue_disable_cb (struct virtqueue *_vq );

like, that's the entire vibe. one function, one pointer, no drama 🦋

🫶 ARGUMENTS 🫶

  • _vq — the struct virtqueue we're talking about. yeah. that one. your queue. your bestie. the whole reason you're here 💫

🌸 DESCRIPTION 🌸

okay so important thing first, bestie, because this is the part where people get caught out: this call is not necessarily synchronous. which means it's unreliable 😭 and it's only useful as an optimization. that's not me being dramatic, that's literally the note. don't build your whole correctness story on it, fr fr 🙈

~~the other thing~~ and the other cute thing about it: unlike other operations, this need not be serialized. so you don't have to hold hands with everyone else to call it. lowkey freeing ngl 💅

no cap, those two caveats are the whole personality of this function. read them twice before you ship. the "unreliable" is doing real work in that sentence 👑

🦋 SEE ALSO 🦋

the whole friend group, gathered for you 💜 also peep the kernel file ./drivers/virtio/virtio_ring.c — that's where the lore lives:

they all ate, no crumbs 💖

aaaand that's the page!! go disable some callbacks, but like, mindfully 🧚 this little transmission came to you from the source ./drivers/virtio, dated October 2026, and it stars virtqueue_disable_cb(9) in the lead role ⭐ mwah, ily, bye!! 🎀💜🦋

📦 where this page comes from