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OS-1566 filesystem limits for ZFS datasets

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          --- old/usr/src/man/man5/zpool-features.5
          +++ new/usr/src/man/man5/zpool-features.5
   1    1  '\" te
   2    2  .\" Copyright (c) 2012 by Delphix. All rights reserved.
        3 +.\" Copyright (c) 2012 Joyent, Inc. All rights reserved.
   3    4  .\" The contents of this file are subject to the terms of the Common Development
   4    5  .\" and Distribution License (the "License").  You may not use this file except
   5    6  .\" in compliance with the License. You can obtain a copy of the license at
   6    7  .\" usr/src/OPENSOLARIS.LICENSE or http://www.opensolaris.org/os/licensing.
   7    8  .\"
   8    9  .\" See the License for the specific language governing permissions and
   9   10  .\" limitations under the License. When distributing Covered Code, include this
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  12   13  .\" CDDL HEADER, with the fields enclosed by brackets "[]" replaced with your
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  15      -.TH ZPOOL-FEATURES 5 "Mar 16, 2012"
       16 +.TH ZPOOL-FEATURES 5 "Oct 24, 2012"
  16   17  .SH NAME
  17   18  zpool\-features \- ZFS pool feature descriptions
  18   19  .SH DESCRIPTION
  19   20  .sp
  20   21  .LP
  21   22  ZFS pool on\-disk format versions are specified via "features" which replace
  22   23  the old on\-disk format numbers (the last supported on\-disk format number is
  23   24  28). To enable a feature on a pool use the \fBupgrade\fR subcommand of the
  24   25  \fBzpool\fR(1M) command, or set the \fBfeature@\fR\fIfeature_name\fR property
  25   26  to \fBenabled\fR.
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 190  191  When there are many snapshots, each snapshot uses many Block Pointer
 191  192  Objects (bpobj's) to track blocks associated with that snapshot.
 192  193  However, in common use cases, most of these bpobj's are empty.  This
 193  194  feature allows us to create each bpobj on-demand, thus eliminating the
 194  195  empty bpobjs.
 195  196  
 196  197  This feature is \fBactive\fR while there are any filesystems, volumes,
 197  198  or snapshots which were created after enabling this feature.
 198  199  .RE
 199  200  
      201 +.sp
      202 +.ne 2
      203 +.na
      204 +\fB\fBfilesystem_limits\fR\fR
      205 +.ad
      206 +.RS 4n
      207 +.TS
      208 +l l .
      209 +GUID    com.joyent:filesystem_limits
      210 +READ\-ONLY COMPATIBLE   yes
      211 +DEPENDENCIES    none
      212 +.TE
      213 +
      214 +This feature enables filesystem and snapshot limits. These limits can be used
      215 +to control how many filesystems and/or snapshots can be created at the point in
      216 +the tree on which the limits are set.
      217 +
      218 +This feature is \fBactive\fR once either of the limit properties has been
      219 +set on a dataset and is deactivated when the last limit is removed.
      220 +.RE
      221 +
 200  222  .SH "SEE ALSO"
 201  223  \fBzpool\fR(1M)
    
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