My primary Illumos build workstation is a new-ish Core i5-2500K. To begin tinkering with the Illumos kernel, I installed Open Indiana 151 using the dev-il repository. The build process works great on OI-151 up to the point where you upgrade the system via the onu script. I didn’t realized it was an issue until I ran into trouble after a reboot and went to test my modifications. None of my changes showed up!
I am debugging a particularly nasty problem with my motherboard’s USB 3.0 hardware and simple functions I inserted into Illumos to help debug were not showing up in KMDB sessions. I went searching the internet for a solution and found that the version change of the Open Indiana dev-il repository conflicted with package builds in the Illumos internal repository. I reinstalled with Open Indiana 148 and the problem went away.
You can read the bug report here: https://www.illumos.org/issues/1118