Re: [patch] lockless, scalable get_pid(), for_each_process() elimination, 2.5.35-BK

[Rogier Wolff <R.E.Wolff@BitWizard.nl>]

On Wed, Sep 18, 2002 at 09:48:24AM -0700, Linus Torvalds wrote:
> 
> > 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)

> The people who care about ps being pretty will probably never see more 
> than 5 digits.

Agreed. While on the topic of number of digits: If this is in place
we could easily start out pid_max at say 9999, fitting the pids in
one less digit than we normally do now. 

(I've always thought we should have sticked with pid_max at the
traditional Unix value of 32000, and not 32767).

			Roger. 

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