ftrace not showing the process names for all processes on syscall events

[David Laight]

I've just updated one of my systems to 5.6.0-rc7+ (end of last week).
ftrace in showing <...>-3179 in the system call events for a couple
of threads of the active processes.
Other threads of the same processes are fine.
The scheduler process switch events also show the full name.

Is this a known regression?

	David

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