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Ryan Moeller 6fe3498ca3
Import vdev ashift optimization from FreeBSD 
Many modern devices use physical allocation units that are much
larger than the minimum logical allocation size accessible by
external commands. Two prevalent examples of this are 512e disk
drives (512b logical sector, 4K physical sector) and flash devices
(512b logical sector, 4K or larger allocation block size, and 128k
or larger erase block size). Operations that modify less than the
physical sector size result in a costly read-modify-write or garbage
collection sequence on these devices.

Simply exporting the true physical sector of the device to ZFS would
yield optimal performance, but has two serious drawbacks:

 1. Existing pools created with devices that have different logical
    and physical block sizes, but were configured to use the logical
    block size (e.g. because the OS version used for pool construction
    reported the logical block size instead of the physical block
    size) will suddenly find that the vdev allocation size has
    increased. This can be easily tolerated for active members of
    the array, but ZFS would prevent replacement of a vdev with
    another identical device because it now appears that the smaller
    allocation size required by the pool is not supported by the new
    device.

 2. The device's physical block size may be too large to be supported
    by ZFS. The optimal allocation size for the vdev may be quite
    large. For example, a RAID controller may export a vdev that
    requires read-modify-write cycles unless accessed using 64k
    aligned/sized requests. ZFS currently has an 8k minimum block
    size limit.

Reporting both the logical and physical allocation sizes for vdevs
solves these problems. A device may be used so long as the logical
block size is compatible with the configuration. By comparing the
logical and physical block sizes, new configurations can be optimized
and administrators can be notified of any existing pools that are
sub-optimal.

Reviewed-by: Ryan Moeller <ryan@iXsystems.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Co-authored-by: Matthew Macy <mmacy@freebsd.org>
Signed-off-by: Matt Macy <mmacy@FreeBSD.org>
Closes #10619
 		2020-08-21 12:53:17 -07:00
..
Makefile.in Add device rebuild feature 2020-07-03 11:05:50 -07:00
THIRDPARTYLICENSE.cityhash OpenZFS 8484 - Implement aggregate sum and use for arc counters 2018-06-06 09:35:59 -07:00
THIRDPARTYLICENSE.cityhash.descrip OpenZFS 8484 - Implement aggregate sum and use for arc counters 2018-06-06 09:35:59 -07:00
abd.c Add gang ABD child to parent gang ABD 2020-07-24 21:09:20 -07:00
aggsum.c Reduce number of atomic_add() calls in aggsum 2020-02-06 13:21:06 -08:00
arc.c Import vdev ashift optimization from FreeBSD 2020-08-21 12:53:17 -07:00
blkptr.c Add zstd support to zfs 2020-08-20 10:30:06 -07:00
bplist.c Fast Clone Deletion 2019-07-26 10:54:14 -07:00
bpobj.c Rename refcount.h to zfs_refcount.h 2020-07-29 16:35:33 -07:00
bptree.c Rename refcount.h to zfs_refcount.h 2020-07-29 16:35:33 -07:00
bqueue.c Implement Redacted Send/Receive 2019-06-19 09:48:12 -07:00
btree.c Fix typo in btree.c 2020-08-17 15:25:37 -07:00
dataset_kstats.c Fix panic on DilOS with kstat per dataset statistics 2019-09-03 12:12:31 -07:00
dbuf.c Add zstd support to zfs 2020-08-20 10:30:06 -07:00
dbuf_stats.c Mark functions as static 2020-06-18 12:20:38 -07:00
ddt.c Remove dead code 2020-06-18 12:21:18 -07:00
ddt_zap.c Refactor dnode dirty context from dbuf_dirty 2020-02-26 16:09:17 -08:00
dmu.c Add zstd support to zfs 2020-08-20 10:30:06 -07:00
dmu_diff.c Mark write_record static 2019-12-03 09:51:44 -08:00
dmu_object.c Add include files for prototypes 2020-06-18 12:21:25 -07:00
dmu_objset.c Add zstd support to zfs 2020-08-20 10:30:06 -07:00
dmu_recv.c Add zstd support to zfs 2020-08-20 10:30:06 -07:00
dmu_redact.c dmu_objset_from_ds must be called with dp_config_rwlock held 2020-03-12 10:55:02 -07:00
dmu_send.c Add zstd support to zfs 2020-08-20 10:30:06 -07:00
dmu_traverse.c Make module tunables cross platform 2019-09-05 14:49:49 -07:00
dmu_tx.c Refactor dnode dirty context from dbuf_dirty 2020-02-26 16:09:17 -08:00
dmu_zfetch.c Make module tunables cross platform 2019-09-05 14:49:49 -07:00
dnode.c Fix indentation in dnode_free_range() 2020-08-20 11:45:20 -07:00
dnode_sync.c Make use of ZFS_DEBUG consistent within kmod sources 2020-07-25 20:07:44 -07:00
dsl_bookmark.c Fix typos 2020-06-09 21:24:09 -07:00
dsl_crypt.c Mark functions as static 2020-06-18 12:20:38 -07:00
dsl_dataset.c Add zstd support to zfs 2020-08-20 10:30:06 -07:00
dsl_deadlist.c Fix i/o error handling of livelists and zap iteration 2020-08-05 10:22:09 -07:00
dsl_deleg.c Reduce loaded range tree memory usage 2019-10-09 10:36:03 -07:00
dsl_destroy.c Fix i/o error handling of livelists and zap iteration 2020-08-05 10:22:09 -07:00
dsl_dir.c Fix i/o error handling of livelists and zap iteration 2020-08-05 10:22:09 -07:00
dsl_pool.c Mark functions as static 2020-06-18 12:20:38 -07:00
dsl_prop.c Replace sprintf()->snprintf() and strcpy()->strlcpy() 2020-06-07 11:42:12 -07:00
dsl_scan.c Add device rebuild feature 2020-07-03 11:05:50 -07:00
dsl_synctask.c Fix typos in module/zfs/ 2019-09-02 17:56:41 -07:00
dsl_userhold.c Replace sprintf()->snprintf() and strcpy()->strlcpy() 2020-06-07 11:42:12 -07:00
edonr_zfs.c Add include files for prototypes 2020-06-18 12:21:25 -07:00
fm.c Enable zpool events tunables and tests on FreeBSD 2020-02-18 11:22:56 -08:00
gzip.c Add include files for prototypes 2020-06-18 12:21:25 -07:00
hkdf.c Encryption patch follow-up 2017-10-11 16:54:48 -04:00
lz4.c Prefix zfs internal endian checks with _ZFS 2020-07-28 13:02:49 -07:00
lzjb.c Add include files for prototypes 2020-06-18 12:21:25 -07:00
metaslab.c Use zfs_dbgmsg to log metaslab_load/unload 2020-08-12 10:10:50 -07:00
mmp.c Add zfs_multihost_interval tunable handler for FreeBSD 2020-06-23 13:32:42 -07:00
multilist.c Make use of ZFS_DEBUG consistent within kmod sources 2020-07-25 20:07:44 -07:00
objlist.c Implement Redacted Send/Receive 2019-06-19 09:48:12 -07:00
pathname.c Disable unused pathname::pn_path* (unneeded in Linux) 2019-07-15 13:57:56 -07:00
range_tree.c Clarify error message when a range-tree double-add occurs 2020-08-07 14:13:13 -07:00
refcount.c Rename refcount.h to zfs_refcount.h 2020-07-29 16:35:33 -07:00
rrwlock.c Rename refcount.h to zfs_refcount.h 2020-07-29 16:35:33 -07:00
sa.c Mark functions as static 2020-06-18 12:20:38 -07:00
sha256.c Add include files for prototypes 2020-06-18 12:21:25 -07:00
skein_zfs.c Add include files for prototypes 2020-06-18 12:21:25 -07:00
spa.c Import vdev ashift optimization from FreeBSD 2020-08-21 12:53:17 -07:00
spa_boot.c Add include files for prototypes 2020-06-18 12:21:25 -07:00
spa_checkpoint.c Refactor dnode dirty context from dbuf_dirty 2020-02-26 16:09:17 -08:00
spa_config.c Import vdev ashift optimization from FreeBSD 2020-08-21 12:53:17 -07:00
spa_errlog.c Fix typos in module/zfs/ 2019-09-02 17:56:41 -07:00
spa_history.c Make spa_history_zone platform-dependent in kernel 2020-03-02 09:43:30 -08:00
spa_log_spacemap.c Make module tunables cross platform 2019-09-05 14:49:49 -07:00
spa_misc.c Add zstd support to zfs 2020-08-20 10:30:06 -07:00
space_map.c Rename refcount.h to zfs_refcount.h 2020-07-29 16:35:33 -07:00
space_reftree.c Reduce loaded range tree memory usage 2019-10-09 10:36:03 -07:00
txg.c Use boot_ncpus in place of max_ncpus in taskq_create 2020-05-20 10:07:21 -07:00
uberblock.c MMP interval and fail_intervals in uberblock 2019-03-21 12:47:57 -07:00
unique.c Reduce loaded range tree memory usage 2019-10-09 10:36:03 -07:00
vdev.c Import vdev ashift optimization from FreeBSD 2020-08-21 12:53:17 -07:00
vdev_cache.c Replace ASSERTV macro with compiler annotation 2019-12-05 12:37:00 -08:00
vdev_indirect.c Import vdev ashift optimization from FreeBSD 2020-08-21 12:53:17 -07:00
vdev_indirect_births.c Fixes: #8934 Large kmem_alloc 2019-07-10 15:54:49 -07:00
vdev_indirect_mapping.c Replace ASSERTV macro with compiler annotation 2019-12-05 12:37:00 -08:00
vdev_initialize.c Rename refcount.h to zfs_refcount.h 2020-07-29 16:35:33 -07:00
vdev_label.c Add device rebuild feature 2020-07-03 11:05:50 -07:00
vdev_mirror.c Import vdev ashift optimization from FreeBSD 2020-08-21 12:53:17 -07:00
vdev_missing.c Import vdev ashift optimization from FreeBSD 2020-08-21 12:53:17 -07:00
vdev_queue.c Add device rebuild feature 2020-07-03 11:05:50 -07:00
vdev_raidz.c Import vdev ashift optimization from FreeBSD 2020-08-21 12:53:17 -07:00
vdev_raidz_math.c FreeBSD: Fixes required to build ZFS on PowerPC 2020-07-25 11:00:23 -07:00
vdev_raidz_math_aarch64_neon.c Linux 5.0 compat: SIMD compatibility 2019-07-12 09:31:20 -07:00
vdev_raidz_math_aarch64_neon_common.h FreeBSD: fix the build with Clang 11 2020-08-17 15:40:17 -07:00
vdev_raidz_math_aarch64_neonx2.c Linux 5.0 compat: SIMD compatibility 2019-07-12 09:31:20 -07:00
vdev_raidz_math_avx2.c FreeBSD: fix the build with Clang 11 2020-08-17 15:40:17 -07:00
vdev_raidz_math_avx512bw.c Refactor ccompile.h to not include system headers 2020-07-25 20:09:50 -07:00
vdev_raidz_math_avx512f.c FreeBSD: fix the build with Clang 11 2020-08-17 15:40:17 -07:00
vdev_raidz_math_impl.h Fix const-correctness in raidz math 2020-02-03 10:52:41 -08:00
vdev_raidz_math_powerpc_altivec.c Prefix zfs internal endian checks with _ZFS 2020-07-28 13:02:49 -07:00
vdev_raidz_math_powerpc_altivec_common.h FreeBSD: fix the build with Clang 11 2020-08-17 15:40:17 -07:00
vdev_raidz_math_scalar.c Linux 5.3: Fix switch() fall though compiler errors 2019-08-21 09:29:23 -07:00
vdev_raidz_math_sse2.c FreeBSD: fix the build with Clang 11 2020-08-17 15:40:17 -07:00
vdev_raidz_math_ssse3.c Refactor ccompile.h to not include system headers 2020-07-25 20:09:50 -07:00
vdev_rebuild.c Add missed thread_exit() to vdev_{autotrim,rebuild}_thread 2020-08-05 10:17:07 -07:00
vdev_removal.c Trim L2ARC 2020-06-09 10:15:08 -07:00
vdev_root.c Import vdev ashift optimization from FreeBSD 2020-08-21 12:53:17 -07:00
vdev_trim.c Add missed thread_exit() to vdev_{autotrim,rebuild}_thread 2020-08-05 10:17:07 -07:00
zap.c Rename refcount.h to zfs_refcount.h 2020-07-29 16:35:33 -07:00
zap_leaf.c Refactor dnode dirty context from dbuf_dirty 2020-02-26 16:09:17 -08:00
zap_micro.c Rename refcount.h to zfs_refcount.h 2020-07-29 16:35:33 -07:00
zcp.c filesystem_limit/snapshot_limit is incorrectly enforced against root 2020-07-11 17:18:02 -07:00
zcp_get.c Add include files for prototypes 2020-06-18 12:21:25 -07:00
zcp_global.c OpenZFS 8600 - ZFS channel programs - snapshot 2018-02-08 15:29:24 -08:00
zcp_iter.c Fix typos in module/zfs/ 2019-09-02 17:56:41 -07:00
zcp_set.c Support setting user properties in a channel program 2020-02-14 13:41:42 -08:00
zcp_synctask.c filesystem_limit/snapshot_limit is incorrectly enforced against root 2020-07-11 17:18:02 -07:00
zfeature.c Replace ASSERTV macro with compiler annotation 2019-12-05 12:37:00 -08:00
zfs_byteswap.c Mark functions as static 2020-06-18 12:20:38 -07:00
zfs_fm.c Add zpool status -s (slow I/Os) and -p (parseable) 2018-11-08 16:47:24 -08:00
zfs_fuid.c FreeBSD: Fix UNIX permissions checking 2020-08-18 09:57:07 -07:00
zfs_ioctl.c Add zstd support to zfs 2020-08-20 10:30:06 -07:00
zfs_log.c Add prototypes 2020-06-18 12:21:32 -07:00
zfs_onexit.c Remove deduplicated send/receive code 2020-04-23 10:06:57 -07:00
zfs_quota.c File incorrectly zeroed when receiving incremental stream that toggles -L 2020-06-09 10:41:01 -07:00
zfs_ratelimit.c Change checksum & IO delay ratelimit values 2018-03-04 17:34:51 -08:00
zfs_replay.c Simplify FreeBSD's locking requirements in zfs_replay.c 2020-01-22 17:55:56 -08:00
zfs_rlock.c Add a "try" operation for range locks 2020-07-06 11:53:31 -07:00
zfs_sa.c Add convenience wrappers for common uio usage 2020-06-14 10:09:55 -07:00
zil.c Mark functions as static 2020-06-18 12:20:38 -07:00
zio.c Add zstd support to zfs 2020-08-20 10:30:06 -07:00
zio_checksum.c Mark functions as static 2020-06-18 12:20:38 -07:00
zio_compress.c Add zstd support to zfs 2020-08-20 10:30:06 -07:00
zio_inject.c Replace ASSERTV macro with compiler annotation 2019-12-05 12:37:00 -08:00
zle.c Add include files for prototypes 2020-06-18 12:21:25 -07:00
zrlock.c Remove dead code 2020-06-18 12:21:18 -07:00
zthr.c Introduce names for ZTHRs 2020-07-29 09:43:33 -07:00
zvol.c Fix typos 2020-06-09 21:24:09 -07:00