Re: [patch] lockless, scalable get_pid(), for_each_process()

Rik van Riel (riel@conectiva.com.br)
Wed, 18 Sep 2002 13:32:29 -0300 (BRT)

On Wed, 18 Sep 2002, Linus Torvalds wrote:

> I would suggest something like this:
> - make pid_max start out at 32k or whatever, to make "ps" look nice if
> nothing else.
> - every time we have _any_ trouble at all with looking up a new pid, we
> double pid_max.

> + if (nr_threads > pid_max >> 4)
> + pid_max <<= 1;

... but watch out for over/underflow. ;)

It would also be nice if we had some known limit on pid_max (say 8
million, fits in 7 digits).

regards,

Rik

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