Re: [feature] automatically detect hung TASK_UNINTERRUPTIBLE tasks

[Ingo Molnar]

* Andi Kleen <andi@xxxxxxxxxxxxxx> wrote:

> > Until now users had little direct recourse to get such problems 
> > fixed. (we had sysrq-t, but that included no real metric of how long 
> > a task was
> 
> Actually task delay accounting can measure this now.  iirc someone had 
> a latencytop based on it already.

Delay accounting (or the /proc/<PID>/sched fields that i added recently) 
only get updated once a task has finished its unreasonably long delay 
and has scheduled. So lockups or extremely long delays _wont be 
detected_ this way. This is a debugging facility that clearly belongs 
into the kernel. Your arguments just make no objective sense.

	Ingo
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