kern/52916: vinum causes panic after start/stop/... cycle, easy to reproduce

[Pawel Malachowski]

The following reply was made to PR kern/52916; it has been noted by GNATS.

From: "Pawel Malachowski" <pawmal at unia.3lo.lublin.pl>
To: Greg 'groggy' Lehey <grog at FreeBSD.org>
Cc: Freebsd-gnats-submit at FreeBSD.org
Subject: Re: kern/52916: vinum causes panic after start/stop/... cycle, easy to reproduce
Date: Mon, 23 Jun 2003 23:40:36 +0200

 On 6 Jun 2003 at 14:52, Greg 'groggy' Lehey wrote:
 
 > I'm guessing this has something to do with md devices.  Do you use
 > any?  I don't, and every 'vinum start' created one.  I've committed a
 > fix to vinum(8) (revision 1.31.2.6 of src/sbin/vinum/commands.c).
 > Please try it and tell me if it fixes the problem.
 
 Problem appears when we call (f)sync() while `vinum start' command is working.
 After killing syslogd (which was using fsync(), I have both /var/log and /dev
 on / fs with SoftUpdates enabled), stability increased.
 
 I was running /bin/sync frequently during vinum start/stop loop and sometimes I
 can see `rm' (and other commands called from make_devices(), src/sbin/vinum/v.c)
 complaining it was not possible to remove/recreate device files in /dev/vinum.
 Panic happened within few seconds.
 
 
 -- 
 Pawe³ Ma³achowski