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Subject: Re: [PATCH] Linux-2.5 fix/improve get_pid()
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Helge Hafting <helgehaf@aitel.hist.no>
Cc: "Albert D. Cahalan" <acahalan@cs.uml.edu>, linux-kernel@vger.kernel.org
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Date: 09 Aug 2002 11:32:33 +0100
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On Fri, 2002-08-09 at 09:48, Helge Hafting wrote:
> Use 32-bit PID's, but with an additional rule for wraparound.
> Simply wrap the PID when 
> (nextPID > 2*number_of_processes && nextPID > 30000)
> The latter one just to avoid wrapping at 10 when there are 
> 5 processes.  

Its much simpler to put max_pid into /proc/sys/kernel. That way we can
boot with 32000 process ids, which will ensure ancient stuff which has
16bit pid_t (old old libc) and also any old kernel interfaces which
expose it - does ipc ? 

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