Re: [PATCH 2/2] perf: Userspace software event and ioctl

On Fri, 2014-09-26 at 12:23 +0100, Ingo Molnar wrote:

quoted

As in: allows *all* tasks to inject the data? Are you sure we 
don't want more fine-grained control, in particular per task?

Yeah. If the profiler allows it, then any task that is being 
traced can inject data.

The "that is being traced" fragment was the key here. I missed the fact
that perf trace already takes a list of pids, so we're not talking about
all tasks in the system. That should work.

Paweł