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Mariusz Zaborski cdf89f413c Flush RRD only when TXGs contain data 
This change modifies the behavior of spa_sync_time_logger when
flushing the RRD database.

Previously, once the sync interval elapsed, a flush would always
be generated. On solid-state devices, especially when the pool was
otherwise idle, this caused disks to wake up solely to write RRD
data. Since RRD is best-effort telemetry, this behavior is
unnecessary and wasteful.

With this change, spa_sync_time_logger delays flushing until a TXG
that already contains data is being synced. The RRD update is
appended to that TXG instead of forcing the creation of
a new write-only TXG.

During pool export, flushing is forced regardless of whether
the TXG contains user data. At that stage, data durability takes
precedence and a write must be issued.

Sponsored by: [Wasabi Technology, Inc.; Klara, Inc.]
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Mariusz Zaborski <mariusz.zaborski@klarasystems.com>
Closes #18082
Closes #18138
2026-02-11 11:35:45 -08:00
..
abd.c
Preserve LIFO ordering of kmap ops in abd_raidz_gen_iterate()
2025-12-09 09:12:16 -08:00
aggsum.c
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
arc.c
arc: remove unused l2df_size and l2df_type from l2arc_data_free_t
2026-02-04 10:07:26 -08:00
blake3_zfs.c
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
blkptr.c
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
bplist.c
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
bpobj.c
Pass flags to more DMU write/hold functions
2025-10-29 11:17:51 -07:00
bptree.c
Pass flags to more DMU write/hold functions
2025-10-29 11:17:51 -07:00
bqueue.c
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
brt.c
Add BRT support to zpool prefetch command
2025-11-10 16:16:22 -08:00
btree.c
Prefer VERIFY0P(n) over VERIFY3P(n, ==, NULL)
2025-08-07 11:41:42 -07:00
dataset_kstats.c
ZIL: "crash" the ZIL if the pool suspends during fallback
2025-08-08 16:43:26 -07:00
dbuf_stats.c
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
dbuf.c
Improve caching for dbuf prefetches
2026-02-04 10:12:32 -08:00
ddt_log.c
DDT: Move logs searches out of the lock
2025-12-15 09:17:04 -08:00
ddt_stats.c
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
ddt_zap.c
DDT: Fix compressed entry buffer size
2025-12-15 14:52:44 -08:00
ddt.c
DDT: Add locking for table ZAP destruction
2026-01-13 15:07:15 -08:00
dmu_diff.c
Allow physical rewrite without logical
2025-08-06 10:36:07 -07:00
dmu_direct.c
Prefer VERIFY0P(n) over VERIFY3P(n, ==, NULL)
2025-08-07 11:41:42 -07:00
dmu_object.c
Prefer VERIFY0P(n) over VERIFY3P(n, ==, NULL)
2025-08-07 11:41:42 -07:00
dmu_objset.c
Allow rewrite skip cloned and snapshotted blocks
2026-02-09 10:17:56 -08:00
dmu_recv.c
Fix activating large_microzap on receive
2026-02-05 15:48:03 -08:00
dmu_redact.c
Pass flags to more DMU write/hold functions
2025-10-29 11:17:51 -07:00
dmu_send.c
Prefer VERIFY0P(n) over VERIFY3P(n, ==, NULL)
2025-08-07 11:41:42 -07:00
dmu_traverse.c
Allow physical rewrite without logical
2025-08-06 10:36:07 -07:00
dmu_tx.c
Improve caching for dbuf prefetches
2026-02-04 10:12:32 -08:00
dmu_zfetch.c
tunables: remove legacy FreeBSD aliases
2025-09-08 10:03:01 -07:00
dmu.c
Add BRT support to zpool prefetch command
2025-11-10 16:16:22 -08:00
dnode_sync.c
Prefer VERIFY0P(n) over VERIFY3P(n, ==, NULL)
2025-08-07 11:41:42 -07:00
dnode.c
Update dnode_next_offset_level to accept blkid instead of offset
2025-11-04 13:12:17 -08:00
dsl_bookmark.c
Prefer VERIFY0P(n) over VERIFY3P(n, ==, NULL)
2025-08-07 11:41:42 -07:00
dsl_crypt.c
Prefer VERIFY0P(n) over VERIFY3P(n, ==, NULL)
2025-08-07 11:41:42 -07:00
dsl_dataset.c
Add snapshots_changed_nsecs dataset property
2026-01-06 09:36:20 -08:00
dsl_deadlist.c
Fix missed assertion update in physical rewrite patch
2025-08-13 15:56:25 -04:00
dsl_deleg.c
Prefer VERIFY0(n) over VERIFY(n == 0)
2025-08-07 11:40:59 -07:00
dsl_destroy.c
Prefer VERIFY0P(n) over VERIFY3P(n, ==, NULL)
2025-08-07 11:41:42 -07:00
dsl_dir.c
Prefer VERIFY0(n) over VERIFY(n == 0)
2025-08-07 11:40:59 -07:00
dsl_pool.c
Prefer VERIFY0P(n) over VERIFY(n == NULL)
2025-08-07 11:41:37 -07:00
dsl_prop.c
Prefer VERIFY0(n) over VERIFY(n == 0)
2025-08-07 11:40:59 -07:00
dsl_scan.c
Use reduced precision for scan times
2025-12-18 10:22:11 -08:00
dsl_synctask.c
dmu_tx_assign: make all VERIFY0 calls use DMU_TX_SUSPEND
2025-05-28 10:28:59 -07:00
dsl_userhold.c
Prefer VERIFY0(n) over VERIFY(n == 0)
2025-08-07 11:40:59 -07:00
edonr_zfs.c
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
fm.c
Prefer VERIFY0(n) over VERIFY(n == 0)
2025-08-07 11:40:59 -07:00
gzip.c
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
hkdf.c
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
lz4_zfs.c
SPDX: license tags: BSD-2-Clause
2025-03-13 17:56:46 -07:00
lz4.c
SPDX: license tags: BSD-2-Clause
2025-03-13 17:56:46 -07:00
lzjb.c
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
metaslab.c
Pass flags to more DMU write/hold functions
2025-10-29 11:17:51 -07:00
mmp.c
mmp: claim sequence id before final import
2026-02-09 09:36:01 -08:00
multilist.c
Allow vmem_alloc backed multilists
2025-08-12 13:36:03 -07:00
objlist.c
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
pathname.c
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
range_tree.c
range_tree: drop duplicate zfs_ prefix from rs_set_fill_raw
2025-09-29 16:38:52 -07:00
refcount.c
Implement allocation size ranges and use for gang leaves (#17111)
2025-05-02 15:32:18 -07:00
rrwlock.c
Prefer VERIFY0P(n) over VERIFY(n == NULL)
2025-08-07 11:41:37 -07:00
sa.c
Lock db_mtx around arc_release() in couple places
2026-01-26 21:32:16 -05:00
sha2_zfs.c
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
skein_zfs.c
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
spa_checkpoint.c
Pass flags to more DMU write/hold functions
2025-10-29 11:17:51 -07:00
spa_config.c
spa_misc: add an API for spa_namespace_lock
2025-11-10 14:23:39 -08:00
spa_errlog.c
Allow physical rewrite without logical
2025-08-06 10:36:07 -07:00
spa_history.c
Pass flags to more DMU write/hold functions
2025-10-29 11:17:51 -07:00
spa_log_spacemap.c
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
spa_misc.c
mmp: add spa_load_name() for tryimport
2026-02-09 09:35:03 -08:00
spa_stats.c
Prefer VERIFY0(n) over VERIFY(n == 0)
2025-08-07 11:40:59 -07:00
spa.c
Flush RRD only when TXGs contain data
2026-02-11 11:35:45 -08:00
space_map.c
Pass flags to more DMU write/hold functions
2025-10-29 11:17:51 -07:00
space_reftree.c
Prefer VERIFY0(n) over VERIFY(n == 0)
2025-08-07 11:40:59 -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
txg.c
txg_wait_synced_flags: add TXG_WAIT_SUSPEND flag to not wait if pool suspended
2025-05-28 10:27:46 -07:00
u8_textprep.c
u8_textprep: move into module/zfs
2025-12-22 14:58:36 -08:00
uberblock.c
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
unique.c
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
vdev_draid_rand.c
SPDX: license tags: LicenseRef-OpenZFS-ThirdParty-PublicDomain
2025-03-13 17:57:31 -07:00
vdev_draid.c
Detect a slow raidz child during reads
2025-09-10 15:25:03 -07:00
vdev_file.c
Enable zhack to work properly with 4k sector size disks
2025-09-10 11:13:55 -07:00
vdev_indirect_births.c
Pass flags to more DMU write/hold functions
2025-10-29 11:17:51 -07:00
vdev_indirect_mapping.c
Pass flags to more DMU write/hold functions
2025-10-29 11:17:51 -07:00
vdev_indirect.c
Prefer VERIFY0P(n) over VERIFY3P(n, ==, NULL)
2025-08-07 11:41:42 -07:00
vdev_initialize.c
spa_misc: add an API for spa_namespace_lock
2025-11-10 14:23:39 -08:00
vdev_label.c
mmp: claim sequence id before final import
2026-02-09 09:36:01 -08:00
vdev_mirror.c
Allow physical rewrite without logical
2025-08-06 10:36:07 -07:00
vdev_missing.c
Implement allocation size ranges and use for gang leaves (#17111)
2025-05-02 15:32:18 -07:00
vdev_queue.c
tunables: remove legacy FreeBSD aliases
2025-09-08 10:03:01 -07:00
vdev_raidz_math_aarch64_neon_common.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
vdev_raidz_math_aarch64_neon.c
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
vdev_raidz_math_aarch64_neonx2.c
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
vdev_raidz_math_avx2.c
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
vdev_raidz_math_avx512bw.c
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
vdev_raidz_math_avx512f.c
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
vdev_raidz_math_impl.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
vdev_raidz_math_powerpc_altivec_common.h
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
vdev_raidz_math_powerpc_altivec.c
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
vdev_raidz_math_scalar.c
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
vdev_raidz_math_sse2.c
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
vdev_raidz_math_ssse3.c
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
vdev_raidz_math.c
tunables: don't assert initialisation in impl getters
2025-05-28 16:50:22 -07:00
vdev_raidz.c
RAIDZ: Remove some excessive logging
2025-12-17 14:00:01 -08:00
vdev_rebuild.c
spa_misc: add an API for spa_namespace_lock
2025-11-10 14:23:39 -08:00
vdev_removal.c
spa_misc: add an API for spa_namespace_lock
2025-11-10 14:23:39 -08:00
vdev_root.c
Implement allocation size ranges and use for gang leaves (#17111)
2025-05-02 15:32:18 -07:00
vdev_trim.c
spa_misc: add an API for spa_namespace_lock
2025-11-10 14:23:39 -08:00
vdev.c
FreeBSD: unbreak compilation on i386
2026-01-14 17:02:41 -08:00
zap_leaf.c
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
zap_micro.c
DDT: Add/use zap_lookup_length_uint64_by_dnode()
2025-12-15 14:38:34 -08:00
zap.c
DDT: Add/use zap_lookup_length_uint64_by_dnode()
2025-12-15 14:38:34 -08:00
zcp_get.c
Add snapshots_changed_nsecs dataset property
2026-01-06 09:36:20 -08:00
zcp_global.c
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
zcp_iter.c
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
zcp_set.c
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
zcp_synctask.c
zcp_synctask: add zfs.sync.clone()
2025-06-10 14:53:10 -07:00
zcp.c
Prefer VERIFY0P(n) over VERIFY3P(n, ==, NULL)
2025-08-07 11:41:42 -07:00
zfeature.c
Synchronize the update of feature refcount
2025-08-22 16:35:58 -07:00
zfs_byteswap.c
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
zfs_chksum.c
chksum: run 256K benchmark on demand, preserve chksum_stat_data
2025-12-01 10:14:52 -08:00
zfs_crrd.c
Fix time database update calculations
2025-09-12 16:33:36 -07:00
zfs_debug_common.c
nvlist: Add nvlist_snprintf() and zfs_dbgmsg_nvlist()
2025-04-18 09:22:16 -04:00
zfs_fm.c
Fix snapshot automount expiry cancellation deadlock
2025-12-01 14:43:42 -08:00
zfs_fuid.c
libspl: move SID definitions from zfs_context.h; remove kernel gate
2025-11-12 10:01:48 -08:00
zfs_impl.c
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
zfs_ioctl.c
Fix send:raw permission for send -w -I
2026-02-11 10:30:26 -08:00
zfs_log.c
ZIL: pass commit errors back to ITX callbacks
2025-08-08 16:43:20 -07:00
zfs_onexit.c
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
zfs_quota.c
Bypass snprintf() in quota checks if no quotas set
2025-12-17 21:59:47 -05:00
zfs_ratelimit.c
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
zfs_replay.c
dmu_tx: rename dmu_tx_assign() flags from TXG_* to DMU_TX_* (#17143)
2025-03-18 16:04:22 -07:00
zfs_rlock.c
Prefer VERIFY0(n) over VERIFY3U(n, ==, 0)
2025-08-07 11:41:25 -07:00
zfs_sa.c
ZIL: allow zil_commit() to fail with error
2025-08-08 16:43:09 -07:00
zfs_vnops.c
Restrict cloning with different properties
2026-02-10 09:53:24 -08:00
zfs_znode.c
Add default user/group/project quota properties
2025-04-03 10:35:22 -07:00
zil.c
ZIL: Make allocations more flexible
2025-08-14 08:50:17 -07:00
zio_checksum.c
Prefer VERIFY0(n) over VERIFY(n == 0)
2025-08-07 11:40:59 -07:00
zio_compress.c
Removed unused zio_decompress_fail_fraction variable
2025-08-06 17:10:03 -07:00
zio_inject.c
spa_misc: add an API for spa_namespace_lock
2025-11-10 14:23:39 -08:00
zio.c
DDT: Move logs searches out of the lock
2025-12-15 09:17:04 -08:00
zle.c
SPDX: license tags: CDDL-1.0
2025-03-13 17:56:27 -07:00
zrlock.c
Prefer VERIFY0P(n) over VERIFY3P(n, ==, NULL)
2025-08-07 11:41:42 -07:00
zthr.c
Prefer VERIFY0P(n) over VERIFY3P(n, ==, NULL)
2025-08-07 11:41:42 -07:00
zvol.c
spa_misc: add an API for spa_namespace_lock
2025-11-10 14:23:39 -08:00