[Bug 291459] bhyve PCI passthrough (ppt) resets device with pending transactions on 15.0-RELEASE - regression from 14.3

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=291459

--- Comment #2 from Emrion <kmachine@free.fr> ---
So, after some more testing, the random is actually the time taken by the
"passtrued" NIC to not function anymore as Christian Hofstede-Kuhn stated.
Then, the watchdog arise which lead to a series of down/up.

I tried to revert all commits between 15.0-RELEASE and 14.3-RELEASE for
usr.sbin/bhyve, lib/libvmmapi and sys/amd64/vmm (used sys/modules/vmm to
compile). I did that one by one, putting back the 15.0 version of the two
others for each test: no result.

I don't know what to do now. Could it be the kernel itself?

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