On Thu, 9 Jun 2005, David Laight wrote:
>> Unmapped is a real problem; without this, you could still
>> 	pp = p->parent;
>> 	do {
>> 		qq = pp;
>> 		ppid = pp->pid;
>> 		pp = p->parent;
>> 	} while (pp != qq);
>
> Technically, it could change twice, and the memory could be used for
> something else in between.....

In some other place, using rwlocks was suggested, maybe that would be 
useful here to lock out writers, but allow multiple readers.
Dunno if that's still too much overhead then.


  - Hubert

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