Tom Caputi a8b2e30685 Support re-prioritizing asynchronous prefetches ...

When sequential scrubs were merged, all calls to arc_read()
(including prefetch IOs) were given ZIO_PRIORITY_ASYNC_READ.
Unfortunately, this behaves badly with an existing issue where
prefetch IOs cannot be re-prioritized after the issue. The
result is that synchronous reads end up in the same vdev_queue
as the scrub IOs and can have (in some workloads) multiple
seconds of latency.

This patch incorporates 2 changes. The first ensures that all
scrub IOs are given ZIO_PRIORITY_SCRUB to allow the vdev_queue
code to differentiate between these I/Os and user prefetches.
Second, this patch introduces zio_change_priority() to provide
the missing capability to upgrade a zio's priority.

Reviewed by: George Wilson <george.wilson@delphix.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Tom Caputi <tcaputi@datto.com>
Closes #6921 
Closes #6926

2017-12-21 09:13:06 -08:00

..

crypto

OpenZFS 4185 - add new cryptographic checksums to ZFS: SHA-512, Skein, Edon-R

2016-10-03 14:51:15 -07:00

fm

Native Encryption for ZFS on Linux

2017-08-14 10:36:48 -07:00

fs

Unbreak the scan status ABI

2017-11-30 09:40:13 -08:00

sysevent

Emit history events for 'zpool create'

2017-10-23 09:45:59 -07:00

abd.h

OpenZFS 8416 - abd.h is not C++ friendly

2017-06-30 11:11:01 -07:00

arc_impl.h

Support re-prioritizing asynchronous prefetches

2017-12-21 09:13:06 -08:00

arc.h

Sequential scrub and resilvers

2017-11-15 17:27:01 -08:00

avl_impl.h

Support custom build directories and move includes

2010-09-08 12:38:56 -07:00

avl.h

Remove dead code from AVL tree

2017-10-05 19:28:00 -07:00

blkptr.h

OpenZFS 8067 - zdb should be able to dump literal embedded block pointer

2017-07-07 11:28:01 -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

bqueue.h

Illumos 5960, 5925

2016-01-08 15:08:19 -08:00

dbuf.h

OpenZFS 7531 - Assign correct flags to prefetched buffers

2017-11-11 20:24:34 -08:00

ddt.h

Native Encryption for ZFS on Linux

2017-08-14 10:36:48 -07:00

dmu_impl.h

OpenZFS 7793 - ztest fails assertion in dmu_tx_willuse_space

2017-03-07 09:51:59 -08:00

dmu_objset.h

Native Encryption for ZFS on Linux

2017-08-14 10:36:48 -07:00

dmu_send.h

Free objects when receiving full stream as clone

2017-10-10 15:30:51 -07:00

dmu_traverse.h

Native Encryption for ZFS on Linux

2017-08-14 10:36:48 -07:00

dmu_tx.h

OpenZFS 7793 - ztest fails assertion in dmu_tx_willuse_space

2017-03-07 09:51:59 -08:00

dmu_zfetch.h

OpenZFS 6322 - ZFS indirect block predictive prefetch

2016-08-30 14:26:55 -07:00

dmu.h

OpenZFS 8585 - improve batching done in zil_commit()

2017-12-05 09:39:16 -08:00

dnode.h

Improved dnode allocation and dmu_hold_impl()

2017-09-05 16:15:04 -07:00

dsl_bookmark.h

Illumos 4368, 4369.

2014-07-29 10:55:29 -07:00

dsl_crypt.h

Native Encryption for ZFS on Linux

2017-08-14 10:36:48 -07:00

dsl_dataset.h

Typo in dsl_dataset.h

2017-10-12 17:10:38 -07:00

dsl_deadlist.h

Support custom build directories and move includes

2010-09-08 12:38:56 -07:00

dsl_deleg.h

Native Encryption for ZFS on Linux

2017-08-14 10:36:48 -07:00

dsl_destroy.h

Illumos #3888

2013-11-04 11:18:14 -08:00

dsl_dir.h

Native Encryption for ZFS on Linux

2017-08-14 10:36:48 -07:00

dsl_pool.h

Sequential scrub and resilvers

2017-11-15 17:27:01 -08:00

dsl_prop.h

Illumos 6171 - dsl_prop_unregister() slows down dataset eviction.

2016-01-12 10:53:12 -08:00

dsl_scan.h

Sequential scrub and resilvers

2017-11-15 17:27:01 -08:00

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

edonr.h

OpenZFS 4185 - add new cryptographic checksums to ZFS: SHA-512, Skein, Edon-R

2016-10-03 14:51:15 -07:00

efi_partition.h

Fix spelling

2017-01-03 11:31:18 -06:00

frame.h

Suppress incorrect objtool warnings

2017-12-07 10:28:50 -08:00

hkdf.h

Encryption patch follow-up

2017-10-11 16:54:48 -04:00

Makefile.am

Suppress incorrect objtool warnings

2017-12-07 10:28:50 -08:00

metaslab_impl.h

OpenZFS 7613 - ms_freetree[4] is only used in syncing context

2017-01-26 15:27:19 -08:00

metaslab.h

OpenZFS 7303 - dynamic metaslab selection

2017-01-12 11:52:56 -08:00

mmp.h

Add callback for zfs_multihost_interval

2017-07-25 13:22:20 -04:00

mntent.h

Make zfs mount according to relatime config in dataset

2016-04-05 18:55:59 -07:00

multilist.h

OpenZFS 7968 - multi-threaded spa_sync()

2017-03-20 18:36:00 -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

pathname.h

Add pn_alloc()/pn_free() functions

2016-04-21 09:49:25 -07:00

policy.h

Add zfs allow and zfs unallow support

2016-06-07 09:16:52 -07:00

range_tree.h

Sequential scrub and resilvers

2017-11-15 17:27:01 -08:00

refcount.h

OpenZFS 8081 - Compiler warnings in zdb

2017-10-27 12:46:35 -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

Implement large_dnode pool feature

2016-06-24 13:13:21 -07:00

sa.h

Remove unused sa_update_from_cb()

2016-12-01 16:39:06 -07:00

sdt.h

Add line info and SET_ERROR() to ZFS debug log

2017-07-25 23:09:48 -07:00

sha2.h

OpenZFS 4185 - add new cryptographic checksums to ZFS: SHA-512, Skein, Edon-R

2016-10-03 14:51:15 -07:00

skein.h

OpenZFS 4185 - add new cryptographic checksums to ZFS: SHA-512, Skein, Edon-R

2016-10-03 14:51:15 -07:00

spa_boot.h

Support custom build directories and move includes

2010-09-08 12:38:56 -07:00

spa_checksum.h

Implementation of AVX2 optimized Fletcher-4

2016-06-02 14:30:51 -07:00

spa_impl.h

Sequential scrub and resilvers

2017-11-15 17:27:01 -08:00

spa.h

Undo c89 workarounds to match with upstream

2017-11-04 13:25:13 -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

sysevent.h

OpenZFS 6939 - add sysevents to zfs core for commands

2017-07-12 21:28:13 -07:00

trace_acl.h

Fix build-it compilation regression

2017-01-24 08:50:15 -08:00

trace_arc.h

Support re-prioritizing asynchronous prefetches

2017-12-21 09:13:06 -08:00

trace_common.h

OpenZFS 6531 - Provide mechanism to artificially limit disk performance

2016-05-26 10:11:51 -07:00

trace_dbgmsg.h

Add line info and SET_ERROR() to ZFS debug log

2017-07-25 23:09:48 -07:00

trace_dbuf.h

Crash in dbuf_evict_one with DTRACE_PROBE

2017-08-09 11:04:41 -07:00

trace_dmu.h

OpenZFS 7793 - ztest fails assertion in dmu_tx_willuse_space

2017-03-07 09:51:59 -08:00

trace_dnode.h

Fix build-it compilation regression

2017-01-24 08:50:15 -08:00

trace_multilist.h

Fix build-it compilation regression

2017-01-24 08:50:15 -08:00

trace_txg.h

Fix build-it compilation regression

2017-01-24 08:50:15 -08:00

trace_zil.h

OpenZFS 8585 - improve batching done in zil_commit()

2017-12-05 09:39:16 -08:00

trace_zio.h

Use cstyle -cpP in make cstyle check

2016-12-12 10:46:26 -08:00

trace_zrlock.h

Use cstyle -cpP in make cstyle check

2016-12-12 10:46:26 -08:00

trace.h

Remove duplicate typedefs from trace.h

2015-01-06 16:53:24 -08:00

txg_impl.h

Fix spelling

2017-01-03 11:31:18 -06:00

txg.h

OpenZFS 8063 - verify that we do not attempt to access inactive txg

2017-05-10 13:52:22 -04:00

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

OpenZFS 8491 - uberblock on-disk padding to reserve space for smoothly merging zpool checkpoint & MMP in ZFS

2017-07-24 13:47:51 -04:00

uberblock.h

Multi-modifier protection (MMP)

2017-07-13 13:54:00 -04:00

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

Remove custom root pool import code

2016-08-11 11:19:34 -07:00

vdev_file.h

Use a dedicated taskq for vdev_file

2016-12-21 10:47:15 -08:00

vdev_impl.h

Sequential scrub and resilvers

2017-11-15 17:27:01 -08:00

vdev_raidz_impl.h

Use cstyle -cpP in make cstyle check

2016-12-12 10:46:26 -08:00

vdev_raidz.h

Use cstyle -cpP in make cstyle check

2016-12-12 10:46:26 -08:00

vdev.h

Support re-prioritizing asynchronous prefetches

2017-12-21 09:13:06 -08:00

xvattr.h

Fix spelling

2017-01-03 11:31:18 -06:00

zap_impl.h

OpenZFS 7793 - ztest fails assertion in dmu_tx_willuse_space

2017-03-07 09:51:59 -08:00

zap_leaf.h

Illumos 5056 - ZFS deadlock on db_mtx and dn_holds

2015-04-28 16:25:34 -07:00

zap.h

OpenZFS 1300 - filename normalization doesn't work for removes

2017-02-02 14:13:41 -08:00

zfeature.h

Revert "zhack: Add 'feature disable' command"

2016-05-17 11:52:07 -07:00

zfs_acl.h

Rename zfs_sb_t -> zfsvfs_t

2017-03-10 09:51:33 -08:00

zfs_context.h

OpenZFS 640 - number_to_scaled_string is duplicated in several commands

2017-10-30 14:47:20 -07:00

zfs_ctldir.h

Rename zfs_sb_t -> zfsvfs_t

2017-03-10 09:51:33 -08:00

zfs_debug.h

Add line info and SET_ERROR() to ZFS debug log

2017-07-25 23:09:48 -07:00

zfs_delay.h

cstyle: Resolve C style issues

2013-12-18 16:46:35 -08:00

zfs_dir.h

Rename zfs_sb_t -> zfsvfs_t

2017-03-10 09:51:33 -08:00

zfs_fuid.h

Rename zfs_sb_t -> zfsvfs_t

2017-03-10 09:51:33 -08:00

zfs_ioctl.h

Send / Recv Fixes following b52563

2017-08-23 16:54:24 -07:00

zfs_onexit.h

Support custom build directories and move includes

2010-09-08 12:38:56 -07:00

zfs_ratelimit.h

Add missing *_destroy/*_fini calls

2017-05-04 19:26:28 -04:00

zfs_rlock.h

Rename zfs_sb_t -> zfsvfs_t

2017-03-10 09:51:33 -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

Linux 4.12 compat: super_setup_bdi_name()

2017-05-02 09:46:18 -07:00

zfs_vnops.h

Rename zfs_* functions

2017-03-10 09:51:35 -08:00

zfs_znode.h

OpenZFS 8081 - Compiler warnings in zdb

2017-10-27 12:46:35 -07:00

zil_impl.h

OpenZFS 8603 - rename zilog's "zl_writer_lock" to "zl_issuer_lock"

2017-12-06 11:38:10 -08:00

zil.h

OpenZFS 8585 - improve batching done in zil_commit()

2017-12-05 09:39:16 -08:00

zio_checksum.h

Remove dependency on linear ABD

2017-03-29 12:24:51 -07:00

zio_compress.h

DLPX-44812 integrate EP-220 large memory scalability

2016-11-29 14:34:27 -08:00

zio_crypt.h

Encryption patch follow-up

2017-10-11 16:54:48 -04:00

zio_impl.h

Native Encryption for ZFS on Linux

2017-08-14 10:36:48 -07:00

zio_priority.h

Add -lhHpw options to "zpool iostat" for avg latency, histograms, & queues

2016-05-12 12:36:32 -07:00

zio.h

Support re-prioritizing asynchronous prefetches

2017-12-21 09:13:06 -08:00

zpl.h

Use cstyle -cpP in make cstyle check

2016-12-12 10:46:26 -08:00

zrlock.h

OpenZFS 6328 - Fix cstyle errors in zfs codebase

2017-01-12 09:42:11 -08:00

zvol.h

Add port of FreeBSD 'volmode' property

2017-07-12 13:05:37 -07:00