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Subject: Re: Changes to kern.geom.debugflags?
From: Chris Ross <cross+freebsd@distal.com>
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Date: Mon, 7 Jan 2013 20:53:51 -0500
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To: Marius Strobl <marius@alchemy.franken.de>
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Cc: freebsd-sparc64@freebsd.org, avg@freebsd.org, Kurt Lidl <lidl@pix.net>
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On Jan 7, 2013, at 17:41 , Chris Ross <cross+freebsd@distal.com> wrote:
>  Okay.  I've completed this search.  SVN rev 242228 works, boots up, =
the first call
> to dnode_read() (in sys/boot/zfs/zfsimpl.c) (well, "first" call after =
the console is initialized)
> shows (due to a printf I added) :
>=20
> dnode_read(): offset 512, bsize 16384, dn_datablkszsec 32
>=20
>  I notice in all of the many following calls that bsize is always 512 =
or 16384, and
> dn_datablkszsec is sometimes as small as 1, or as large as 68, but =
always non-zero.
>=20
>  SVN revision 242230 fails in the same way the head of stable/9 does.  =
The first output
> I see from my printf in dnode_read() is (and the following trap):
>=20
> dnode_read(): offset 512, bsize 0, dn_datablkszsec 0
> ERROR: Last Trap: Division by Zero
>=20
>  I didn't test 242229,. but could if needed, because both 242229 and =
242230 were
> ZFS changes in the boot code, and by the same person.

  Out of curiosity, I did try 242229. It boots.  So. the problem =
occurred with 242230, which=20
came from 241289.  FYI.

               - Chris