Gaming on FreeBSD 15.0 via PCI Passthrough on Windows 10 Pro w/ AMD Radeon RX 6900 XT minor update

Hey folks,

I got a chance today to upgrade my server from FreeBSD 14.3 to FreeBSD 15.0 (15.0-RELEASE-p2) and re-checked the AMD Radeon RX 6900 XT passthrough that I was reporting on last year. I can happily report that the passthrough is continuing to work with about the same stability as before. I know there was a regression at the beginning of FreeBSD 15.0's release, so I waited a bit while those patches made their way into the kernel.

I can say the following:

- I did some minor gaming to test the stability of the gaming VM on Windows 10 Pro for about 30-45 min on Cyberpunk 2077: Phantom Liberty. Performance was the same as before.
- I would usually get a massive lag spike every once in a while, probably some scheduling bug in the kernel somewhere. This doesn't cause the VM to crash, but I do need to wait about 20-30 seconds before things "settle down" again. This was happening in FreeBSD 14.3 so it isn't something new.
- On FreeBSD 14.3, I could get at least 30 days of uptime (or more) before the VM would crash/exit. Basically if I leave the VM running long enough, it will exit. Not sure what's the reason for that since my server doesn't really experience memory pressure/contention that would cause something like an OOM killer to run and kill the VM. So it would need to be something else. I'm sure this would also happen in FreeBSD 15.0 if I leave the VM running long enough in the background as well.

Either way, this is a really good situation to be in, so I'm not complaining :D, but I believe things will continue to improve over time. Anyways, take care all and stay safe,

Jonathan Vasquez
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