From: Matthew Wilcox <Matthew.Wilcox@genedata.com>
To: Andries.Brouwer@cwi.nl
Cc: ralf@uni-koblenz.de, alan@lxorguk.ukuu.org.uk, bishop@sekure.org,
daniel.kobras@student.uni-tuebingen.de, drepper@cygnus.com,
linux-kernel@vger.rutgers.edu, mingo@chiara.csoma.elte.hu
Subject: Re: size of pid_t (was: Re: NR_TASKS as config option)
Date: Mon, 14 Jun 1999 11:08:38 +0200 [thread overview]
Message-ID: <19990614110838.J1415@mencheca.ch.genedata.com> (raw)
In-Reply-To: <UTC199906131847.UAA26622.aeb@eland.cwi.nl>; from Andries.Brouwer@cwi.nl on Sun, Jun 13, 1999 at 08:47:08PM +0200
On Sun, Jun 13, 1999 at 08:47:08PM +0200, Andries.Brouwer@cwi.nl wrote:
> #define PID_MAX 0x8000
> in <linux/tasks.h>, and at first sight not much goes wrong
> if we pick some larger number for PID_MAX, like 0x7fffffff.
> (There are some comparisons around, so for simplicity we should
> keep PID_MAX positive.)
Also, a negative pid_t is used to represent the process group in some
calls, notably the SIOCSPGRP and SIOCGPGRP ioctls.
--
Matthew Wilcox <willy@bofh.ai>
"Windows and MacOS are products, contrived by engineers in the service of
specific companies. Unix, by contrast, is not so much a product as it is a
painstakingly compiled oral history of the hacker subculture." - N Stephenson
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next prev parent reply other threads:[~1999-06-14 9:09 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
1999-06-13 18:47 Andries.Brouwer
1999-06-13 19:48 ` Pavel Machek
1999-06-15 0:43 ` Mike Touloumtzis
1999-06-14 9:08 ` Matthew Wilcox [this message]
1999-06-14 9:22 ` Ralf Baechle
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