Messages in this thread | | | From | "Bernhard Bender" <> | Date | Wed, 27 Sep 2000 14:32:17 +0100 | Subject | PIDs limited to 15 significant bits |
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Hi,
looking at my process list after a week or so of uptime I discoverd that PIDs seem to wrap arround at 32767 (aka. 2^15 - 1).
I found the relevant code doing this in kernel/fork.c:get_pid() where a mask (0xffff8000) is used to limit the PID of a new process to 15 significant bits. (I am running 2.4.0-test6 currently)
I find this "feature" annoying, since I like to view my process list sorted by PID, which gives a nice overview about recently started processes vs. age-old daemons.
So, I would like to ask if someone could please explain the reason for this. If there is no compelling reason I would like to propose to remove this limit. I recall this was not present in 2.2.x
After all, UIDs have just been changes to 32bits, why limit PIDs?
thanks Bernhard
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