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
..
2017-08-14 10:36:48 -07:00
2019-05-07 15:18:44 -07:00
2018-05-29 16:00:33 -07:00
2019-01-17 15:25:00 -08:00
2018-05-01 11:24:20 -07:00
2019-05-07 15:18:44 -07:00
2019-05-07 15:18:44 -07:00
2019-05-07 15:18:44 -07:00
2018-08-15 09:53:44 -07:00
2019-05-23 13:46:33 -07:00
2018-05-29 16:00:33 -07:00
2019-04-12 11:30:59 -07:00
2018-05-29 16:00:33 -07:00
2018-05-29 16:00:33 -07:00
2017-10-11 16:54:48 -04:00
2019-05-02 16:46:04 -07:00
2019-03-29 09:13:20 -07:00
2018-05-29 16:00:33 -07:00
2018-05-29 16:00:33 -07:00
2018-10-01 10:42:05 -07:00
2018-03-15 10:53:58 -07:00
2018-05-29 16:00:33 -07:00
2019-05-23 19:17:00 -07:00
2019-05-09 10:08:05 -07:00
2018-05-29 16:00:33 -07:00
2019-03-29 09:13:20 -07:00
2019-03-29 09:13:20 -07:00
2019-04-14 11:03:06 -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
2018-05-29 16:00:33 -07:00
2018-05-29 16:00:33 -07:00
2018-05-29 16:00:33 -07:00
2018-05-29 16:00:33 -07:00
2018-02-13 14:54:54 -08:00
2019-05-25 14:29:10 -07:00
2019-04-16 10:01:45 -07:00
2019-03-15 14:14:31 -07:00
2019-04-04 18:57:06 -07:00
2018-02-09 10:08:05 -08:00
2018-05-29 16:00:33 -07:00
2019-05-08 10:04:04 -07:00