Re: [PATCH] selftests: proc: Make sure wchan works when it exists

On Fri, Oct 8, 2021, at 4:55 PM, Kees Cook wrote:

This makes sure that wchan contains a sensible symbol when a process is blocked. Specifically this calls the sleep() syscall, and expects the architecture to have called schedule() from a function that has "sleep" somewhere in its name. For example, on the architectures I tested (x86_64, arm64, arm, mips, and powerpc) this is "hrtimer_nanosleep":

Is this really better than admitting that the whole mechanism is nonsense and disabling it?

We could have a fixed string for each task state and call it a day.