tl;dr: Using vfork(), one can create a process in a D state that is not immune to signal interruption. Using fsfreeze, one can create a process in a D state that is immune to signal interruption. But wait, how can any D state process be "not immune to signal interruption"? Isn't the whole point of D state processes that they are uninterruptible? If you are wondering this, read on, and you will likely find out some new things about how Linux works internally :-) --- Imagine you're a system adm...
