From owner-freebsd-stable  Mon May 26 02:24:17 1997
Return-Path: <owner-stable>
Received: (from root@localhost)
          by hub.freebsd.org (8.8.5/8.8.5) id CAA08461
          for stable-outgoing; Mon, 26 May 1997 02:24:17 -0700 (PDT)
Received: from agora.rdrop.com (root@agora.rdrop.com [199.2.210.241])
          by hub.freebsd.org (8.8.5/8.8.5) with ESMTP id CAA08440
          for <freebsd-stable@freebsd.org>; Mon, 26 May 1997 02:24:10 -0700 (PDT)
Received: from godzilla.zeta.org.au (godzilla.zeta.org.au [203.2.228.19])
	by agora.rdrop.com (8.8.5/8.8.5) with ESMTP id CAA03564
	for <freebsd-stable@freebsd.org>; Mon, 26 May 1997 02:02:51 -0700 (PDT)
Received: (from bde@localhost) by godzilla.zeta.org.au (8.8.5/8.6.9) id SAA17526; Mon, 26 May 1997 18:55:06 +1000
Date: Mon, 26 May 1997 18:55:06 +1000
From: Bruce Evans <bde@zeta.org.au>
Message-Id: <199705260855.SAA17526@godzilla.zeta.org.au>
To: freebsd-stable@freebsd.org, tomppa@fidata.fi
Subject: Re: 2.2 stable hang or reboot
Sender: owner-stable@freebsd.org
X-Loop: FreeBSD.org
Precedence: bulk

>2.2-stable still hangs or reboots if I do couple mounts too fast on
>shell script or with cut&paste.
>
>Reboot:
>mount -u -o async,noatime /
>mount -u -o async,noatime /u
>mount

Urk.  -current accesses a null pointer in mount() after a few iterations of

	while :; do mount -o async,noatime /; echo -n 1; done

mp->vnodecovered is null in

		mp->mnt_vnodecovered->v_mounted = (struct mount *)0;

Bruce