On Tue, 3 Oct 2017, Pavel Machek wrote: > > Again, I agree that the (rare) kthreads that are actually "creating" new > > I/O have to be somehow frozen and require special care. > > Agreed. Was any effort made to identify those special kernel threads? I don't think there is any other way than just inspecting all the try_to_freeze() instances in the kernel, and understanding what that particular kthread is doing. I've cleaned up most of the low-hanging fruit already, where the try_to_freeze() was obviously completely pointless, but a lot more time needs to be invested into this. -- Jiri Kosina SUSE Labs
