Paul Dagnelie 893a6d62c1 Allow metaslab to be unloaded even when not freed from
On large systems, the memory used by loaded metaslabs can become
a concern. While range trees are a fairly efficient data structure, 
on heavily fragmented pools they can still consume a significant 
amount of memory. This problem is amplified when we fail to unload 
metaslabs that we aren't using. Currently, we only unload a metaslab 
during metaslab_sync_done; in order for that function to be called 
on a given metaslab in a given txg, we have to have dirtied that 
metaslab in that txg. If the dirtying was the result of an allocation, 
we wouldn't be unloading it (since it wouldn't be 8 txgs since it 
was selected), so in effect we only unload a metaslab during txgs 
where it's being freed from.

We move the unload logic from sync_done to a new function, and 
call that function on all metaslabs in a given vdev during 
vdev_sync_done().

Reviewed-by: Richard Elling <Richard.Elling@RichardElling.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Paul Dagnelie <pcd@delphix.com>
Closes #8837
2019-06-06 19:10:43 -07:00
..
2019-05-07 15:18:44 -07:00
2019-03-29 09:13:20 -07:00
2017-10-05 19:28:00 -07:00
2016-01-08 15:08:19 -08:00
2019-05-07 15:18:44 -07:00
2018-09-05 18:33:36 -07:00
2019-05-07 15:18:44 -07:00
2018-10-09 14:05:13 -07:00
2019-05-07 15:18:44 -07:00
2019-05-07 15:18:44 -07:00
2019-03-13 10:58:39 -07:00
2018-10-01 10:40:11 -07:00
2013-11-04 11:17:48 -08:00
2017-01-03 11:31:18 -06:00
2017-12-07 10:28:50 -08:00
2017-10-11 16:54:48 -04:00
2019-03-29 09:13:20 -07:00
2019-03-29 09:13:20 -07:00
2018-05-29 16:00:33 -07:00
2018-10-03 15:30:55 -07:00
2016-04-21 09:49:25 -07:00
2016-06-07 09:16:52 -07:00
2018-02-13 14:54:54 -08:00
2019-03-29 09:13:20 -07:00
2019-05-09 10:08:05 -07:00
2015-01-06 16:53:24 -08:00
2019-03-29 09:13:20 -07:00
2017-07-13 13:54:00 -04:00
2013-11-04 10:55:25 -08:00
2019-03-29 09:13:20 -07:00
2019-03-29 09:13:20 -07:00
2019-03-29 09:13:20 -07:00
2019-03-29 09:13:20 -07:00
2018-02-08 15:28:18 -08:00
2018-02-08 15:28:18 -08:00
2018-06-15 15:10:42 -07:00
2018-02-13 14:54:54 -08:00
2017-03-10 09:51:33 -08:00
2019-03-29 09:13:20 -07:00
2018-05-29 16:00:33 -07:00
2018-05-29 16:00:33 -07:00
2019-05-07 15:18:44 -07:00
2018-02-13 14:54:54 -08:00
2018-02-13 14:54:54 -08:00
2018-09-06 21:44:52 -07:00
2017-03-29 12:24:51 -07:00
2019-03-29 09:13:20 -07:00
2019-03-29 09:13:20 -07:00
2019-03-29 09:13:20 -07:00
2017-07-12 13:05:37 -07:00