Re: [PATCH 2/2] pid: Optional first-fit pid allocation

From: Michal Koutný
Date: Wed Mar 05 2025 - 10:05:03 EST


On Sat, Feb 22, 2025 at 09:02:08AM +0000, David Laight <david.laight.linux@xxxxxxxxx> wrote:
> It also seems a good way of being able to predict the next pid and
> doing all the 'nasty' things that allows because there is no guard
> time on pid reuse.

The motivations was not to make guessing next pid more difficult, I'll
update the docs with better explanation.

> Both first-fit and next-fit have the same issue.
> Picking a random pid is better.

I surely don't want to delve into this now. (I acknowledge that having a
possible range specified per pid ns would be useful for such a
randomization.)

Michal

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