Alyssa Ross writes: > Alyssa Ross writes: > >> Since we introduced the userspace router, if I start the Firefox VM, >> quit Firefox, wait for the VM to shut down, and then start it again, >> networking no longer works, and I see repeating log lines like this: >> >> 2025-12-09 09:13:29.147240893 [2025-12-09T09:13:29Z WARN spectrum_router::router] interface App(0) has been blocked for 1 sec, dropping packet > > Ah, and there's also this just as the first Firefox VM exits: > > 2025-12-09 09:51:17.380783524 [2025-12-09T09:51:17Z ERROR virtio_queue::queue] Iterator error trying to process requests on a queue that's not ready > 2025-12-09 09:51:17.380846889 [2025-12-09T09:51:17Z ERROR virtio_queue::queue] Iterator error trying to process requests on a queue that's not ready And repeated stuff like this from the guest kernel: [ 402.381203] virtio_net virtio2 eth1: NETDEV WATCHDOG: CPU: 0: transmit queue 0 timed out 5792 ms [ 402.382150] virtio_net virtio2 eth1: TX timeout on queue: 0, sq: output.0, vq: 0x1, name: output.0, 5792000 usecs ago >> Full reproduction steps: >> >> 1. cd host/rootfs >> 2. nix-shell --run 'make clean && make run' >> 3. Start Firefox VM with vm-start >> 4. See that networking works >> 5. Quit Firefox and wait a few seconds for VM to stop >> 6. Start Firefox VM with vm-start again >> 7. No more networking, and log lines like the above