Trying to upgrade to snv_91 (same thing when I did snv_90), I get a
very unhelpful error message.  When I dig deeper, I grow concerned
that I am hitting a stupid limit of zfs.  Perhaps someone here can
shed some light on whether this is a known issue that is being worked.

# pkg image-update
DOWNLOAD                                    PKGS       FILES     XFER (MB)
Completed                                554/554 15277/15277 1299.27/1299.27

PHASE                                        ACTIONS
Removal Phase                              3211/3211
Update Phase                             14622/14622
Install Phase                              6261/6261
pkg: unable to activate 2008.05-1

# truss beadm activate 2008.05-1
...
ioctl(3, ZFS_IOC_PROMOTE, 0x08044800)           Err#28 ENOSPC
...

# zfs promote rpool/ROOT/2008.05-1
cannot promote 'rpool/ROOT/2008.05-1': out of space

# zfs list
NAME                                                  USED  AVAIL
REFER  MOUNTPOINT
rpool                                                4.85G  2.47G  55.5K  /rpool
rpool/ROOT                                           4.82G  2.47G    18K  none
rpool/ROOT/2008.05                                   2.91G  2.47G  2.88G  legacy
rpool/ROOT/[EMAIL PROTECTED]:-:2008-06-21-23:55:51      3.76M      -  2.88G  -
rpool/ROOT/2008.05-1                                 1.91G  2.47G  3.47G  legacy
rpool/ROOT/2008.05-1/opt                                 0  2.47G  22.3M  legacy
rpool/ROOT/2008.05/opt                               22.3M  2.47G  22.3M  legacy
rpool/ROOT/2008.05/[EMAIL PROTECTED]:-:2008-06-21-23:55:51      0      -  22.3M 
 -
rpool/export                                         28.7M  2.47G
19K  /export
rpool/export/home                                    28.6M  2.47G
28.6M  /export/home

Notice that the pool has 2.47G available but it can't promote the root
file system for the new boot environment.  This is an operation that,
to the best of my understanding, should take only a few kilobytes.

FWIW, I posted to zfs-discuss a while back
(http://mail.opensolaris.org/pipermail/zfs-discuss/2008-June/048207.html)
and got not a lot of useful help.  This is a disconcerting trend with
zfs-discuss - particularly as I have run across reproducible zfs
related panics (unrelated to Indiana).  I mention my concern with the
helpfulness of zfs-discuss here because it is kinda important to the
OpenSolaris strategy.

-- 
Mike Gerdts
http://mgerdts.blogspot.com/
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