[Bug 254513] virtio_random: random_harvestq spinning on a CPU with Q35 virtio random device

From: <bugzilla-noreply_at_freebsd.org>
Date: Fri, 17 Sep 2021 18:45:35 UTC

--- Comment #29 from Chris Collins <chrysalis@chrysalisnet.org> ---
I just checked the qemu documentation and this is worth noting.

"Using RDRAND on the host, if available, as a source of entropy to pass on to
the guest via virtio-rng is better than the current /dev/random source."

This likely explains why I am seeing virtio rng been less efficient, so on
intel chips its probably a good thing anyway to not use virtio rng.

Regardless I have made a request to proxmox to raise the default value.

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