Re: About PID...???!!!

["John T. Williams" <jowillia@vt.edu>]

definitely higher then 2^16, I've got a process with the PID of 69917
I would guess MAX_INT which is 2^32 -1 = 4294967295

----- Original Message ----- 
From: "Ray Olszewski" <ray@comarre.com>
To: <linux-newbie@vger.kernel.org>
Sent: Wednesday, September 10, 2003 11:58 AM
Subject: Re: About PID...???!!!


> At 11:21 AM 9/10/2003 -0400, John T. Williams wrote:
> >They are assigned linearly, however once a pid is used, it is never
reused
> >until the machine reboots.
>
> This is not quite correct. The pid assignment process wraps, I *think* at
> 32767 (or maybe 65535). Next time around, the kernel skips over any pids
> that are still in use from the last round of assignment.
>
> >A pid of 413 means that when that process was fork()'ed there had been
412
> >other processes already created. But remember every time you type ls,
you've
> >run a process.
> >
> >413 isn't a large pid at all. My linux box which I very rarely reboot is
at
> >PIDs that start at 20000
> >
> >I'm surprised that any program you start after the boot process is as low
as
> >412.
>
> Whether that is surprising or not depends on what he uses the host for
and,
> naturally, on how recently it was rebooted. While my workstation is way up
> there (30180), my Linux-based router, which does not start new processes
> very much, is only at pid 828.
>
> And, of course, there are persistent processes on any Linux host that go
> back to the boot/init process ... starting with init itself (always pid 1)
> and including long-lived daemons such as syslogd, klogd, and portmap;
> pseudo processes that are actually run in the kernel (mostly [k*] process
> names); and getty proceses listening on VTs that never get logins.
>
>
>
> -
> To unsubscribe from this list: send the line "unsubscribe linux-newbie" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at http://www.linux-learn.org/faqs

-
To unsubscribe from this list: send the line "unsubscribe linux-newbie" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.linux-learn.org/faqs