On Tue, Jun 02, 2015 at 07:27:19PM +0300, Kirill Tkhai wrote:
> > + * task_dead_dl() will cancel our timer if we happen to die while
> > + * its still pending.
>
> task_dead_dl() is called for tasks of deadline class only. So if we do that,
> the timer may be executed after final task's dead.
Indeed; sleep deprived brain misses the obvious :/
I can't seem to come up with anything much better than pulling that
hrtimer_cancel() into finish_task_switch(), however sad that is.
Something like:
for_each_class(class) {
if (class->task_dead)
class->task_dead(prev);
}
Would be nicest, but will slow down the common case. And a callback list
has the downside of having to preallocate entries for every task,
causing mostly pointless memory overhead.
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