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Date:      Wed, 14 Apr 2021 11:50:30 +0000
From:      bugzilla-noreply@freebsd.org
To:        virtualization@FreeBSD.org
Subject:   [Bug 254513] virtio_random: random_harvestq spinning on a CPU with Q35 virtio random device
Message-ID:  <bug-254513-27103-y5unmDzDBC@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-254513-27103@https.bugs.freebsd.org/bugzilla/>
References:  <bug-254513-27103@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D254513

Evilham <contact@evilham.com> changed:

           What    |Removed                     |Added
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                 CC|                            |contact@evilham.com

--- Comment #2 from Evilham <contact@evilham.com> ---
\o Hello, just wanted to bump this a bit and provide some more information:

This is happening in 13.0-RELEASE also virtualised under kvm/qemu, which I
didn't catch until now due to only having tested on hardware.

With CPU being busy with rand_harvestq, things were incredibly slow, so, as=
 a
non-reboot work around, I did:

mv /boot/kernel/virtio_random.ko{,.disabled}
kldunload virtio_random

(Mina's suggestion is better as it survives a reboot)

Which actually allows me to use the VM meanwhile.

--=20
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