Removing the kthread freezer?

Using the kernel thread (kthread) freezer has been a longtime problem for a variety of reasons. It is meant as a way to suspend kthreads on the way toward system suspend, but in practice has proved problematic to the point that it came up at both the 2015 and 2016 Kernel Summits (as well as on the mailing lists over the years); the intent is to try to remove the kthread freezer entirely. To that end, Luis Rodriguez led a discussion in the filesystem track of the 2018 Linux Storage, Filesystem, and Memory-Management Summit on the problems and possible solutions.

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