freebsd-nq/include
Ned Bass 417104bdd3 Use cached feature info in spa_add_feature_stats()
Avoid issuing I/O to the pool when retrieving feature flags information.
Trying to read the ZAPs from disk means that zpool clear would hang if
the pool is suspended and recovery would require a reboot. To keep the
feature stats resident in memory, we hang a cached nvlist off of the
spa.  It is built up from disk the first time spa_add_feature_stats() is
called, and refreshed thereafter using the cached feature reference
counts. spa_add_feature_stats() gets called at pool import time so we
can be sure the cached nvlist will be available if the pool is later
suspended.

Signed-off-by: Ned Bass <bass6@llnl.gov>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #3082
2015-03-05 14:11:10 -08:00
..
linux Linux 4.0 compat: bdi_setup_and_register() 2015-03-03 10:49:45 -08:00
sys Use cached feature info in spa_add_feature_stats() 2015-03-05 14:11:10 -08:00
libnvpair.h Support custom build directories and move includes 2010-09-08 12:38:56 -07:00
libuutil_common.h Support custom build directories and move includes 2010-09-08 12:38:56 -07:00
libuutil_impl.h Support custom build directories and move includes 2010-09-08 12:38:56 -07:00
libuutil.h Support custom build directories and move includes 2010-09-08 12:38:56 -07:00
libzfs_core.h Illumos 4757, 4913 2014-08-01 14:28:05 -07:00
libzfs_impl.h Illumos 4368, 4369. 2014-07-29 10:55:29 -07:00
libzfs.h Read spl_hostid module parameter before gethostid() 2015-02-04 16:44:53 -08:00
Makefile.am Kernel header installation should respect --prefix 2014-10-28 09:37:06 -07:00
zfeature_common.h Illumos 4757, 4913 2014-08-01 14:28:05 -07:00
zfs_comutil.h Illumos #2882, #2883, #2900 2013-09-04 15:49:00 -07:00
zfs_deleg.h Illumos 4368, 4369. 2014-07-29 10:55:29 -07:00
zfs_fletcher.h Support custom build directories and move includes 2010-09-08 12:38:56 -07:00
zfs_namecheck.h Illumos 4368, 4369. 2014-07-29 10:55:29 -07:00
zfs_prop.h Check the dataset type more rigorously when fetching properties. 2014-05-06 10:41:46 -07:00
zpios-ctl.h Update code to use misc_register()/misc_deregister() 2014-10-17 14:58:44 -07:00
zpios-internal.h cstyle: Resolve C style issues 2013-12-18 16:46:35 -08:00