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Illumos #3329, #3330, #3331, #3335

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3329 spa_sync() spends 10-20% of its time in spa_free_sync_cb()
3330 space_seg_t should have its own kmem_cache
3331 deferred frees should happen after sync_pass 1
3335 make SYNC_PASS_* constants tunable

Reviewed by: Adam Leventhal <ahl@delphix.com>
Reviewed by: Matt Ahrens <matthew.ahrens@delphix.com>
Reviewed by: Christopher Siden <chris.siden@delphix.com>
Reviewed by: Eric Schrock <eric.schrock@delphix.com>
Reviewed by: Richard Lowe <richlowe@richlowe.net>
Reviewed by: Dan McDonald <danmcd@nexenta.com>
Approved by: Eric Schrock <eric.schrock@delphix.com>

References:
  illumos/illumos-gate@01f55e48fb
  https://www.illumos.org/issues/3329
  https://www.illumos.org/issues/3330
  https://www.illumos.org/issues/3331
  https://www.illumos.org/issues/3335

Ported-by: Brian Behlendorf <behlendorf1@llnl.gov>
This commit is contained in:
George Wilson
2013-05-06 10:14:52 -07:00
committed by Brian Behlendorf
parent 5853fe790d
commit 55d85d5a8c
9 changed files with 75 additions and 22 deletions
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module/zfs/spa.c
+1 -1
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@@ -6078,7 +6078,7 @@ spa_sync(spa_t *spa, uint64_t txg)
spa_errlog_sync(spa, txg);
dsl_pool_sync(dp, txg);
if (pass <= SYNC_PASS_DEFERRED_FREE) {
if (pass < zfs_sync_pass_deferred_free) {
zio_t *zio = zio_root(spa, NULL, NULL, 0);
bplist_iterate(free_bpl, spa_free_sync_cb,
zio, tx);