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Matthew Ahrens ca67b33aba Illumos 5376 - arc_kmem_reap_now() should not result in clearing arc_no_grow 
5376 arc_kmem_reap_now() should not result in clearing arc_no_grow
Reviewed by: Christopher Siden <christopher.siden@delphix.com>
Reviewed by: George Wilson <george.wilson@delphix.com>
Reviewed by: Steven Hartland <killing@multiplay.co.uk>
Reviewed by: Richard Elling <richard.elling@richardelling.com>
Approved by: Dan McDonald <danmcd@omniti.com>

References:
  https://www.illumos.org/issues/5376
  https://github.com/illumos/illumos-gate/commit/2ec99e3

Porting Notes:

The good news is that many of the recent changes made upstream to the
ARC tackled issues previously observed by ZoL with similar solutions.
The bad news is those solution weren't identical to the ones we applied.
This patch is designed to split the difference and apply as much of the
upstream work as possible.

* The arc_available_memory() function was removed previous in ZoL but
due to the upstream changes it makes sense to add it back.  This function
has been customized for Linux so that it can be used to determine a low
memory.  This provides the same basic functionality as the illumos version
allowing us to minimize changes through the rest of the code base.  The
exact mechanism used to detect a low memory state remains unchanged so
this change isn't a significant as it might first appear.

* This patch includes the long standing fix for arc_shrink() which was
originally proposed in #2167.  Since there were related changes to this
function it made sense to include that work.

* The arc_init() function has been re-factored.  As before it sets sane
default values for the ARC but then calls arc_tuning_update() to apply
user specific tuning made via module options.  The arc_tuning_update()
function is then called periodically by the arc_reclaim_thread() to
apply changes to the tunings made during normal operation.

Ported-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #3616
Closes #2167
2015-07-23 09:41:28 -07:00
..
fm Improve on the ZFS events documentation 2015-06-09 11:19:19 -07:00
fs Illumos 5027 - zfs large block support 2015-05-11 12:23:16 -07:00
arc_impl.h Illumos 5701 - zpool list reports incorrect "alloc" value for cache devices 2015-06-25 08:51:44 -07:00
arc.h Make arc_prune() asynchronous 2015-06-11 10:27:25 -07:00
avl_impl.h Support custom build directories and move includes 2010-09-08 12:38:56 -07:00
avl.h Illumos 4745 - fix AVL code misspellings 2015-07-10 11:58:37 -07:00
blkptr.h Illumos 4757, 4913 2014-08-01 14:28:05 -07:00
bplist.h Support custom build directories and move includes 2010-09-08 12:38:56 -07:00
bpobj.h Illumos 5810 - zdb should print details of bpobj 2015-05-11 15:10:24 -07:00
bptree.h Illumos 4914 - zfs on-disk bookmark structure should be named *_phys_t 2014-08-06 14:48:41 -07:00
dbuf.h Illumos 5911 - ZFS "hangs" while deleting file 2015-07-06 09:31:42 -07:00
ddt.h Add ddt, ddt_entry, and l2arc_hdr caches 2014-01-07 10:33:11 -08:00
dmu_impl.h Illumos 4757, 4913 2014-08-01 14:28:05 -07:00
dmu_objset.h Illumos 5269 - zpool import slow 2015-06-09 13:48:02 -07:00
dmu_send.h Illumos 5765 - add support for estimating send stream size with lzc_send_space when source is a bookmark 2015-05-13 09:03:59 -07:00
dmu_traverse.h Illumos 4914 - zfs on-disk bookmark structure should be named *_phys_t 2014-08-06 14:48:41 -07:00
dmu_tx.h dmu_tx kstat cleanup 2014-03-04 12:22:24 -08:00
dmu_zfetch.h Fix zstream_t incorrect type 2013-12-10 10:09:27 -08:00
dmu.h Illumos 5175 - implement dmu_read_uio_dbuf() to improve cached read performance 2015-06-29 14:33:23 -07:00
dnode.h Illumos 5056 - ZFS deadlock on db_mtx and dn_holds 2015-04-28 16:25:34 -07:00
dsl_bookmark.h Illumos 4368, 4369. 2014-07-29 10:55:29 -07:00
dsl_dataset.h Illumos 5765 - add support for estimating send stream size with lzc_send_space when source is a bookmark 2015-05-13 09:03:59 -07:00
dsl_deadlist.h Support custom build directories and move includes 2010-09-08 12:38:56 -07:00
dsl_deleg.h Illumos 4368, 4369. 2014-07-29 10:55:29 -07:00
dsl_destroy.h Illumos #3888 2013-11-04 11:18:14 -08:00
dsl_dir.h Illumos 5056 - ZFS deadlock on db_mtx and dn_holds 2015-04-28 16:25:34 -07:00
dsl_pool.h Illumos 5981 - Deadlock in dmu_objset_find_dp 2015-07-06 09:31:35 -07:00
dsl_prop.h Illumos #3464 2013-09-04 16:01:24 -07:00
dsl_scan.h Illumos 4914 - zfs on-disk bookmark structure should be named *_phys_t 2014-08-06 14:48:41 -07:00
dsl_synctask.h Illumos 4951 - ZFS administrative commands should use reserved space 2015-05-04 09:41:10 -07:00
dsl_userhold.h Illumos #3740 2013-11-04 11:17:48 -08:00
efi_partition.h Move partition scanning from userspace to module. 2012-07-17 09:17:31 -07:00
Makefile.am Illumos 5497 - lock contention on arcs_mtx 2015-06-11 10:27:25 -07:00
metaslab_impl.h Illumos 4976-4984 - metaslab improvements 2014-08-18 08:40:49 -07:00
metaslab.h Illumos 5213 - panic in metaslab_init due to space_map_open returning ENXIO 2014-11-14 15:37:45 -08:00
multilist.h Illumos 5497 - lock contention on arcs_mtx 2015-06-11 10:27:25 -07:00
nvpair_impl.h Support custom build directories and move includes 2010-09-08 12:38:56 -07:00
nvpair.h Replace __va_list with va_list 2014-08-13 10:35:00 -07:00
range_tree.h Illumos #4374 2014-07-30 09:20:35 -07:00
refcount.h Illumos #3464 2013-09-04 16:01:24 -07:00
rrwlock.h Illumos 5008 - lock contention (rrw_exit) while running a read only load 2015-07-06 09:34:13 -07:00
sa_impl.h Illumos 5056 - ZFS deadlock on db_mtx and dn_holds 2015-04-28 16:25:34 -07:00
sa.h Illumos 5056 - ZFS deadlock on db_mtx and dn_holds 2015-04-28 16:25:34 -07:00
sdt.h Swap DTRACE_PROBE* with Linux tracepoints 2014-11-17 11:13:55 -08:00
spa_boot.h Support custom build directories and move includes 2010-09-08 12:38:56 -07:00
spa_impl.h Illumos 5818 - zfs {ref}compressratio is incorrect with 4k sector size 2015-06-10 16:24:01 -07:00
spa.h Illumos 5027 - zfs large block support 2015-05-11 12:23:16 -07:00
space_map.h Illumos 5164-5165 - space map fixes 2014-10-23 15:30:32 -07:00
space_reftree.h Illumos #4101, #4102, #4103, #4105, #4106 2014-07-22 09:39:16 -07:00
trace_acl.h Remove duplicate typedefs from trace.h 2015-01-06 16:53:24 -08:00
trace_arc.h Remove l2ad_evict from zfs_l2arc_evict_class 2015-06-29 09:21:58 -07:00
trace_dbgmsg.h Remove duplicate typedefs from trace.h 2015-01-06 16:53:24 -08:00
trace_dbuf.h Remove duplicate typedefs from trace.h 2015-01-06 16:53:24 -08:00
trace_dmu.h Remove duplicate typedefs from trace.h 2015-01-06 16:53:24 -08:00
trace_dnode.h Remove duplicate typedefs from trace.h 2015-01-06 16:53:24 -08:00
trace_multilist.h Illumos 5497 - lock contention on arcs_mtx 2015-06-11 10:27:25 -07:00
trace_txg.h Remove duplicate typedefs from trace.h 2015-01-06 16:53:24 -08:00
trace_zil.h Remove duplicate typedefs from trace.h 2015-01-06 16:53:24 -08:00
trace_zrlock.h Add NULL guard in zfs_zrlock_class event class 2015-03-27 14:45:32 -07:00
trace.h Remove duplicate typedefs from trace.h 2015-01-06 16:53:24 -08:00
txg_impl.h Illumos #4045 write throttle & i/o scheduler performance work 2013-12-06 09:32:43 -08:00
txg.h Illumos 4753 - increase number of outstanding async writes when sync task is waiting 2014-09-23 13:50:55 -07:00
u8_textprep_data.h Support custom build directories and move includes 2010-09-08 12:38:56 -07:00
u8_textprep.h Support custom build directories and move includes 2010-09-08 12:38:56 -07:00
uberblock_impl.h Support custom build directories and move includes 2010-09-08 12:38:56 -07:00
uberblock.h Illumos 5347 - idle pool may run itself out of space 2015-07-14 10:35:21 -07:00
uio_impl.h Add basic uio support 2011-02-10 09:21:43 -08:00
unique.h Illumos #3742 2013-11-04 10:55:25 -08:00
uuid.h Support custom build directories and move includes 2010-09-08 12:38:56 -07:00
vdev_disk.h cstyle: Resolve C style issues 2013-12-18 16:46:35 -08:00
vdev_file.h Update all default taskq settings 2015-06-25 08:58:16 -07:00
vdev_impl.h Illumos 5818 - zfs {ref}compressratio is incorrect with 4k sector size 2015-06-10 16:24:01 -07:00
vdev.h Illumos 5269 - zpool import slow 2015-06-09 13:48:02 -07:00
xvattr.h Add xvattr support 2011-03-02 11:43:50 -08:00
zap_impl.h Illumos 5027 - zfs large block support 2015-05-11 12:23:16 -07:00
zap_leaf.h Illumos 5056 - ZFS deadlock on db_mtx and dn_holds 2015-04-28 16:25:34 -07:00
zap.h Illumos 3654,3656 2015-05-04 09:41:09 -07:00
zfeature.h Illumos 4370, 4371 2014-07-28 14:29:58 -07:00
zfs_acl.h Illumos #3742 2013-11-04 10:55:25 -08:00
zfs_context.h Illumos 5376 - arc_kmem_reap_now() should not result in clearing arc_no_grow 2015-07-23 09:41:28 -07:00
zfs_ctldir.h Linux 3.7 compat, schedule_delayed_work() 2012-12-12 10:47:05 -08:00
zfs_debug.h Swap DTRACE_PROBE* with Linux tracepoints 2014-11-17 11:13:55 -08:00
zfs_delay.h cstyle: Resolve C style issues 2013-12-18 16:46:35 -08:00
zfs_dir.h Prototype/structure update for Linux 2011-02-10 09:27:21 -08:00
zfs_fuid.h Prototype/structure update for Linux 2011-02-10 09:27:21 -08:00
zfs_ioctl.h zfsdev_getminor() should check for invalid file handles 2015-06-22 17:02:13 -07:00
zfs_onexit.h Support custom build directories and move includes 2010-09-08 12:38:56 -07:00
zfs_rlock.h Illumos #3742 2013-11-04 10:55:25 -08:00
zfs_sa.h Illumos 5027 - zfs large block support 2015-05-11 12:23:16 -07:00
zfs_stat.h Support custom build directories and move includes 2010-09-08 12:38:56 -07:00
zfs_vfsops.h Illumos 5008 - lock contention (rrw_exit) while running a read only load 2015-07-06 09:34:13 -07:00
zfs_vnops.h Add zfs_iput_async() interface 2014-08-11 16:11:43 -07:00
zfs_znode.h Illumos 5008 - lock contention (rrw_exit) while running a read only load 2015-07-06 09:34:13 -07:00
zil_impl.h Illumos 5027 - zfs large block support 2015-05-11 12:23:16 -07:00
zil.h Illumos 5269 - zpool import slow 2015-06-09 13:48:02 -07:00
zio_checksum.h Constify structures containing function pointers 2013-03-04 08:49:32 -08:00
zio_compress.h Illumos #3742 2013-11-04 10:55:25 -08:00
zio_impl.h Illumos #3836 2013-11-05 12:14:56 -08:00
zio.h Illumos 5661 - ZFS: "compression = on" should use lz4 if feature is enabled 2015-07-10 12:11:45 -07:00
zpl.h Restructure per-filesystem reclaim 2015-03-20 10:35:20 -07:00
zrlock.h Support custom build directories and move includes 2010-09-08 12:38:56 -07:00
zvol.h Remove ZFC_IOC_*_MINOR ioctl()s 2013-12-16 09:15:57 -08:00