From mboxrd@z Thu Jan 1 00:00:00 1970 From: "John T. Williams" Subject: Re: About PID...???!!! Date: Wed, 10 Sep 2003 14:03:21 -0400 Sender: linux-newbie-owner@vger.kernel.org Message-ID: <007901c377c5$d2983940$ed64a8c0@descartes> References: <20030910142344.8594.qmail@web20008.mail.yahoo.com> <5.1.0.14.1.20030910084359.01f35750@celine> Reply-To: "John T. Williams" Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Return-path: List-Id: Content-Type: text/plain; charset="us-ascii" To: Ray Olszewski , linux-newbie@vger.kernel.org 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" To: 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