Re: [feature] automatically detect hung TASK_UNINTERRUPTIBLE tasks

Andi Kleen
2007-12-03T14:17:48Z

On Mon, Dec 03, 2007 at 02:55:47PM +0100, Ingo Molnar wrote:
>
> * Andi Kleen <andi@firstfloor.org> wrote:
>
> > I would still appreciate if you could state what default value you
> > plan to set the backtrace sysctl to in the submitted patch.
>
> there's no "backtrace sysctl" planned for the moment. This "hung tasks"

I hope you'll reconsider that at least before submitting
this patch to mainline. For -mm it's probably ok.

> debugging feature can be disabled/enabled on a wide scale already:
>
> - in the .config
>
> - runtime, temporarily, via:
>
> echo 0 > /proc/sys/kernel/hung_task_timeout_secs

That won't address my concerns about already "breaking" (as in
frightening the user etc.) common error handling scenarios by default.

-Andi