KernelTrap is a really great website to read if you’re at least passively interested in OS kernels. For a couple years it was rarely updated and appeared to be largely unmaintained, but they are back with frequent, timely updates and a new UI. They follow Linux kernel development most closely but they also do a bunch of stories about other kernels like the various BSD kernels. This is especially good news since Kernel Traffic is on indefinite hiatus now. KernelTrap isn’t a detailed summary of weekly lkml (linux kernel mailing list) traffic but they do report on certain interesting lkml discussions as they are happening.