From owner-freebsd-current  Sun Jun 27  8:50:20 1999
Delivered-To: freebsd-current@freebsd.org
Received: from ftp.dns.ne.jp (ftp.dns.ne.jp [210.155.3.5])
	by hub.freebsd.org (Postfix) with ESMTP
	id C31B114F34; Sun, 27 Jun 1999 08:50:13 -0700 (PDT)
	(envelope-from tanimura@sakuramail.com)
Received: from silver.carrots (yksk0422.ppp.infoweb.ne.jp [210.131.91.230])
	by ftp.dns.ne.jp (8.9.2/8.8.5) with ESMTP id AAA21178;
	Mon, 28 Jun 1999 00:49:42 +0900 (JST)
Received: from localhost (localhost [127.0.0.1])
	by silver.carrots (8.9.3+3.2W/3.7W) with ESMTP id AAA04335;
	Mon, 28 Jun 1999 00:49:21 +0900 (JST)
To: hibma@skylink.it
Cc: current@FreeBSD.ORG, mckusick@FreeBSD.ORG,
	Peter Wemm <peter@netplex.com.au>
Cc: Seigo Tanimura <tanimura@naklab.dnj.ynu.ac.jp>
Subject: Re: lockmgr panics
From: Seigo Tanimura <tanimura@naklab.dnj.ynu.ac.jp>
In-Reply-To: Your message of "Sun, 27 Jun 1999 14:15:06 +0200 (CEST)"
	<Pine.BSF.3.96.990627140352.2769A-100000@heidi.plazza.it>
References: <Pine.BSF.3.96.990627140352.2769A-100000@heidi.plazza.it>
X-Mailer: Mew version 1.93 on Emacs 19.34 / Mule 2.3 (SUETSUMUHANA)
Mime-Version: 1.0
Content-Type: Text/Plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
Message-Id: <19990628004921U.tanimura@sakuramail.com>
Date: Mon, 28 Jun 1999 00:49:21 +0900
X-Dispatcher: imput version 980905(IM100)
Lines: 32
Sender: owner-freebsd-current@FreeBSD.ORG
Precedence: bulk
X-Loop: FreeBSD.ORG

From: Nick Hibma <hibma@skylink.it>
Subject: lockmgr panics
Date: Sun, 27 Jun 1999 14:15:06 +0200 (CEST)
Message-ID: <Pine.BSF.3.96.990627140352.2769A-100000@heidi.plazza.it>

hibma> lockmgr: pid <some pid>, not exclusive lock holder -2 unlocking


Did you really get that message? if the unlocking process is
pid -2(LK_KERNPROC), we can unlock, as in:

[sys/kern/kern_lock.c:lockmgr()]
>         case LK_RELEASE:
>                 if (lkp->lk_exclusivecount != 0) {
> #if !defined(MAX_PERF)
>                         if (lkp->lk_lockholder != pid &&
>                             lkp->lk_lockholder != LK_KERNPROC) /* FALSE */
>                                 panic("lockmgr: pid %d, not %s %d unlocking",
>                                     pid, "exclusive lock holder",
>                                     lkp->lk_lockholder);

Although the fixes by Peter seemed to have solved the problem, I saw

lockmgr: pid -2, not exclusive lock holder 48 unlocking

on savecore(8) after another panic reboot.


I have to go to bed now... I will see what is going on tomorrow.


Seigo TANIMURA <tanimura@naklab.dnj.ynu.ac.jp>


To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-current" in the body of the message