kern/171865: [geom] g_wither_washer() keeping a core busy

[Fabian Keil]

The following reply was made to PR kern/171865; it has been noted by GNATS.

From: Fabian Keil <fk at fabiankeil.de>
To: Jaakko Heinonen <jh at FreeBSD.org>
Cc: bug-followup at FreeBSD.org, luigi at FreeBSD.org
Subject: Re: kern/171865: [geom] g_wither_washer() keeping a core busy
Date: Wed, 26 Sep 2012 17:41:16 +0200

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 Jaakko Heinonen <jh at FreeBSD.org> wrote:
 
 > On 2012-09-22, Fabian Keil wrote:
 > > I recently found a way to reproduce the problem without using
 > > ZFS or writing to the device.
 > > >How-To-Repeat:
 > > geli onetime /dev/md0
 > > geom sched insert -a rr /dev/md0.eli
 > > geli detach /dev/md0.eli.sched.
 >=20
 > It seems that if you "insert" a sched geom and do "geli detach" on it,
 > the geli geom can't be destroyed.
 >=20
 > After your commands "md0.eli" still exists:
 =20
 > I didn't find a way to destroy it. I suspect a geom_sched bug. luigi@
 > cc'd.
 
 While I can't rule out a geom_sched bug, I usually run into the
 problem while only using glabel+geli+ZFS on an USB device that
 disappears as described in the initial report at:
 http://lists.freebsd.org/pipermail/freebsd-fs/2011-June/011855.html
 
 It's just less convenient to reproduce as it requires more steps
 and the disappearance can also lead to panics like these:
 http://www.freebsd.org/cgi/query-pr.cgi?pr=3Dkern/162010
 http://www.freebsd.org/cgi/query-pr.cgi?pr=3Dkern/162036
 
 Fabian
 
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