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a8b2e30685
freebsd-nq/include/sys
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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
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
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
bpobj.h
bptree.h
bqueue.h
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
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
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
dsl_deleg.h Native Encryption for ZFS on Linux 2017-08-14 10:36:48 -07:00
dsl_destroy.h
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
dsl_scan.h Sequential scrub and resilvers 2017-11-15 17:27:01 -08:00
dsl_synctask.h
dsl_userhold.h
edonr.h
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
multilist.h OpenZFS 7968 - multi-threaded spa_sync() 2017-03-20 18:36:00 -07:00
nvpair_impl.h
nvpair.h
pathname.h
policy.h
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
sa_impl.h
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
skein.h
spa_boot.h
spa_checksum.h
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
space_reftree.h
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
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
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
u8_textprep.h
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
unique.h
uuid.h
vdev_disk.h
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
zap.h OpenZFS 1300 - filename normalization doesn't work for removes 2017-02-02 14:13:41 -08:00
zfeature.h
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
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
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
zfs_stat.h
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
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
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