Subject: [RFC] loading vmw_vsock_virtio_transport by systemd breaks vsock_loopback autoloading

From: Petr Vorel <[email-masked]>
Date: Fri, 20 Mar 2026 12:02:24 +0100

Hi all,

there is a systemd bug [1] which causes vsock_loopback not to be autoloaded due
previous loading vmw_vsock_virtio_transport in an early phase of boot.
vmw_vsock_virtio_transport requires vmw_vsock_virtio_transport_common and vsock,
vsock_loopback requires vsock.

Reproducer: [2].
Proposed fix in systemd: [3]

While I think the bug should be fixed in systemd with proposed fix [3] we'd like
to know opinion of the kernel vsock developers in case there is a way to improve
vsock modules autoloading.

Kind regards,
Petr

[1] https://github.com/systemd/systemd/issues/41100
[2] https://bugzilla.suse.com/attachment.cgi?id=888729
[3] https://github.com/systemd/systemd/issues/41100#issuecomment-4056603242