[Bug 254695] Hyper-V + TCP_BBR: Kernel Panic: Assertion in_epoch(net_epoch_preempt) failed at netinet/tcp_lro.c:915

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From: <bugzilla-noreply_at_freebsd.org>
Date: Wed, 14 Jul 2021 08:22:38 UTC

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=254695

--- Comment #14 from Gordon Bergling <gbe@FreeBSD.org> ---
(In reply to Michael Tuexen from comment #13)

Thats correct. If the Stack is loaded via /boot/loader.conf the system panics,
when the first real network traffic, in my case an attempt to mount a NFS
share, is happening.

When booting with default network stack the system panics, when loading the
tcp_rack or tcp_bbr kernel module.

The panic including the backtrace are the same.

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