Re: [PATCH] move put_task_struct() reaping into a thread [Re: 2.6.18-rt1]

[Ingo Molnar <mingo@elte.hu>]

* Eric W. Biederman <ebiederm@xmission.com> wrote:

> I'm still wondering if we can move put_task_struct a little lower in 
> the logic in the places where it is called, so it isn't called under a 
> lock, or with preemption disabled.  The only downside I see is that it 
> might convolute the logic into unreadability.

well it's all a function of the task reaping logic: right now we in 
essence complete the reaping from the scheduler, via prev_state == 
TASK_DEAD. We cannot do it sooner because the task is still in use. I 
had one other implementation upstream some time ago, which was a 
single-slot cache for reaped tasks - but that uglified other codepaths 
because _something_ has to notice that the task has been unscheduled.

	Ingo
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/