[Devel] Re: [PATCH 3/3] ftrace: add ability to only trace swapper tasks

[Ingo Molnar]

* Andrew Morton <akpm at linux-foundation.org> wrote:

> > Signed-off-by: Steven Rostedt <srostedt at redhat.com>
> 
> What does this patch actually do?  Is swapper currently excluded from 
> tracing for undisclosed reasons and this patch permits it to be traced? 
> If so, why was swapper thus excluded?  Or am I totally off track?

> > +static struct pid * const ftrace_swapper_pid = (struct pid *)1;
> 
> eh?

all side-effects of getting rid of the integer based PID namespace and 
replacing them with struct pid pointers.

	Ingo
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