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

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From: <bugzilla-noreply_at_freebsd.org>
Date: Mon, 13 Sep 2021 16:52:59 UTC

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=254513

--- Comment #20 from Conrad Meyer <cem@freebsd.org> ---
It would be nice to get line numbers on that stack in vtrnd_read.

I wonder if this (misguided) Qemu feature is in play:

> Optional parameters to limit the rate of data sent to the guest are inlucded:
> -device virtio-rng-pci,max-bytes=1024,period=1000
> This restricts the data sent to the guest at 1KB per second. This is useful to not > let a guest starve the host of entropy.

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