Re: [PATCH 08/12] add trace events for each syscall entry/exit

[Steven Rostedt]

On Wed, 26 Aug 2009, Frederic Weisbecker wrote:
> > 
> > All kernel threads have a NULL t->mm. Since do_fork is called by kthreadd 
> > and not by kthread_create, the caller of do_fork will also have a
> > t->mm = NULL.
> > 
> > -- Steve
> > 
> 
> Yeah, that's the case with kthread_create() creation fashion,
> but what if you create a kernel thread using the low level
> kernel_thread() directly (ie: without relaying on kthreadd queue)?
> 
> Especially in Heiko example, it seems to be a duplication of user
> task.
> 
> I wonder what obvious think I'm missing here...

The obvious is that those calls are buggy ;-)

-- Steve

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