OpenIndiana Now Has KPTI Support Up For Testing To Mitigate Meltdown
Thanks in large part to the work done by Joyent on KPTI support for SmartOS/OmniOSce, the Illumos kernel used by OpenIndiana now has a KPTI implementation for testing. They have spun up some live install images for testing as well as an IPS repository containing a KPTI-enabled kernel build. With this KPTI work is also PCID (Process Context Identifier) support too.
Any Illumos/OpenIndiana users wanting to test out this work for mitigating Meltdown on this open-source Solaris-derived platform, more details over on OpenIndiana.org. More background reading is also available via this blog post by one of the involved developers from late February.