From owner-freebsd-hackers  Wed Dec  6 11:16:44 1995
Return-Path: owner-hackers
Received: (from root@localhost)
          by freefall.freebsd.org (8.7.3/8.7.3) id LAA12107
          for hackers-outgoing; Wed, 6 Dec 1995 11:16:44 -0800 (PST)
Received: from phaeton.artisoft.com (phaeton.Artisoft.COM [198.17.250.211])
          by freefall.freebsd.org (8.7.3/8.7.3) with SMTP id LAA12098
          for <freebsd-hackers@FreeBSD.org>; Wed, 6 Dec 1995 11:16:41 -0800 (PST)
Received: (from terry@localhost) by phaeton.artisoft.com (8.6.11/8.6.9) id MAA01689; Wed, 6 Dec 1995 12:15:29 -0700
From: Terry Lambert <terry@lambert.org>
Message-Id: <199512061915.MAA01689@phaeton.artisoft.com>
Subject: Re: samaphore remains
To: m_tanaka@pa.yokogawa.co.jp (Mihoko Tanaka)
Date: Wed, 6 Dec 1995 12:15:29 -0700 (MST)
Cc: freebsd-hackers@FreeBSD.org
In-Reply-To: <9512061002.AA16768@cabbage.pa.yokogawa.co.jp> from "Mihoko Tanaka" at Dec 6, 95 07:02:51 pm
X-Mailer: ELM [version 2.4 PL24]
MIME-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
Sender: owner-hackers@FreeBSD.org
Precedence: bulk

> Currently I'm using FreeBSD-R2.1.0-RELEASE on GATEWAY 2000 P5-90.
> 
> I found the trouble that if a program using semaphore died
> anbormally, the semaphore which was created remains on kernel.
> I think it should be released by kernel's exit() function.
> 
> Although one of the UNIX implementation calls semexit() routine from
> exit(), FreeBSD doesn't call semexit() from anywhere.
> Is there any reason for this?
> 
> 
> I tried to fix the exit() as follows and it seems working well.
> 
> ------------- cut here ---------------
> *** kern_exit.c Tue May 30 17:05:25 1995
> --- kern_exit.c.new     Wed Dec  6 15:12:28 1995
> ***************
> *** 130,135 ****
> --- 130,139 ----
>          */
>         fdfree(p);
>   
> + #ifdef SYSVSEM
> +       semexit(p);
> + #endif
> + 
>         /* The next two chunks should probably be moved to vmspace_exit. */
>         vm = p->p_vmspace;
>   #ifdef SYSVSHM
> ------------- cut here ---------------
> 
> 
> --
> Mihoko Tanaka 
> <m_tanaka@pa.yokogawa.co.jp>     

This looks exactly right.


					Terry Lambert
					terry@lambert.org
---
Any opinions in this posting are my own and not those of my present
or previous employers.