From owner-freebsd-current  Tue May 19 08:43:48 1998
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From: Kevin Day <toasty@home.dragondata.com>
Message-Id: <199805191543.KAA00412@home.dragondata.com>
Subject: Re: SMP related panic on reboot
In-Reply-To: <199805141615.SAA21189@pat.idi.ntnu.no> from Tor Egge at "May 14, 98 06:15:46 pm"
To: Tor.Egge@idi.ntnu.no (Tor Egge)
Date: Tue, 19 May 1998 10:43:27 -0500 (CDT)
Cc: current@FreeBSD.ORG
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This patch appears to work - can anyone else test it?

Kevin


> > 
> > I booted a machine, realized I had forgotten something, and rebooted it
> > instantly after it was done booting.. It panic'ed during the reboot. This is
> > a kernel from ~Feb 25th.
> > 
> > Any questions/ideas?
> > 
> > 
> > boot() called on cpu#0
> > 
> > syncing disks... 3 3 3 1 done
> > panic: lockmgr: pid 195, not exclusive lock holder 1 unlocking
> 
> The following patch might help.
> 
> Index: vfs_subr.c
> ===================================================================
> RCS file: /home/ncvs/src/sys/kern/vfs_subr.c,v
> retrieving revision 1.152
> diff -u -r1.152 vfs_subr.c
> --- vfs_subr.c	1998/04/19 23:32:03	1.152
> +++ vfs_subr.c	1998/04/24 23:42:45
> @@ -2149,9 +2159,13 @@
>  vfs_unmountall()
>  {
>  	struct mount *mp, *nmp;
> -	struct proc *p = initproc;	/* XXX XXX should this be proc0? */
> +	struct proc *p;
>  	int error;
>  
> +	if (curproc)
> +		p = curproc;
> +	else
> +		p = initproc;	/* XXX XXX should this be proc0? */
>  	/*
>  	 * Since this only runs when rebooting, it is not interlocked.
>  	 */
> 
> 
> - Tor Egge
> 


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