svn commit: r268121 - vendor-sys/illumos/dist/common/zfs vendor-sys/illumos/dist/uts/common/fs/zfs vendor/illumos/dist/man/man5

[Xin LI]

Author: delphij
Date: Tue Jul  1 21:19:10 2014
New Revision: 268121
URL: http://svnweb.freebsd.org/changeset/base/268121

Log:
  4924 LZ4 Compression for metadata
  Reviewed by Matthew Ahrens <mahrens at delphix.com>
  Reviewed by Saso Kiselkov <skiselkov.ml at gmail.com>
  Approved by: Christopher Siden <christopher.siden at delphix.com>
  
  illumos/illumos-gate at b8289d24d866c1af02d7007348f7f057693c15d3

Modified:
  vendor/illumos/dist/man/man5/zpool-features.5

Changes in other areas also in this revision:
Modified:
  vendor-sys/illumos/dist/common/zfs/zfeature_common.c
  vendor-sys/illumos/dist/uts/common/fs/zfs/dmu.c
  vendor-sys/illumos/dist/uts/common/fs/zfs/spa.c
  vendor-sys/illumos/dist/uts/common/fs/zfs/zfs_ioctl.c

Modified: vendor/illumos/dist/man/man5/zpool-features.5
==============================================================================
--- vendor/illumos/dist/man/man5/zpool-features.5	Tue Jul  1 21:16:27 2014	(r268120)
+++ vendor/illumos/dist/man/man5/zpool-features.5	Tue Jul  1 21:19:10 2014	(r268121)
@@ -243,13 +243,14 @@ giving approximately 10% better compress
 
 When the \fBlz4_compress\fR feature is set to \fBenabled\fR, the
 administrator can turn on \fBlz4\fR compression on any dataset on the
-pool using the \fBzfs\fR(1M) command. Please note that doing so will
-immediately activate the \fBlz4_compress\fR feature on the underlying
-pool (even before any data is written), and the feature will not be
-deactivated. Since this feature is not read-only compatible, this
-operation will render the pool unimportable on systems without support
-for the \fBlz4_compress\fR feature. Booting off of \fBlz4\fR-compressed
-root pools is supported.
+pool using the \fBzfs\fR(1M) command. Also, all newly written metadata
+will be compressed with \fBlz4\fR algorithm. Since this feature is not
+read-only compatible, this operation will render the pool unimportable
+on systems without support for the \fBlz4_compress\fR feature. Booting
+off of \fBlz4\fR-compressed root pools is supported.
+
+This feature becomes \fBactive\fR as soon as it is enabled and will
+never return to being \fBenabled\fB.
 .RE
 
 .sp