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Date:      Mon, 23 Jun 2003 15:30:13 -0700 (PDT)
From:      "Greg 'groggy' Lehey" <grog@FreeBSD.org>
To:        freebsd-bugs@FreeBSD.org
Subject:   Re: kern/52916: vinum causes panic after start/stop/... cycle, easy to reproduce
Message-ID:  <200306232230.h5NMUDH2053447@freefall.freebsd.org>

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

From: Greg 'groggy' Lehey <grog@FreeBSD.org>
To: Pawel Malachowski <pawmal@unia.3lo.lublin.pl>
Cc: Freebsd-gnats-submit@FreeBSD.org
Subject: Re: kern/52916: vinum causes panic after start/stop/... cycle, easy to reproduce
Date: Tue, 24 Jun 2003 07:52:35 +0930

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 On Monday, 23 June 2003 at 23:40:36 +0200, Pawel Malachowski wrote:
 > 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.
 
 I'd appreciate answers to my questions.  Also a backtrace would help.
 
 Greg
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