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Illumos #3552, #3564

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3552 condensing one space map burns 3 seconds of CPU in spa_sync() thread
3564 spa_sync() spends 5-10% of its time in metaslab_sync() (when not condensing)
Reviewed by: Adam Leventhal <ahl@delphix.com>
Reviewed by: Dan Kimmel <dan.kimmel@delphix.com>
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Approved by: Richard Lowe <richlowe@richlowe.net>

References:
  illumos/illumos-gate@16a4a80742
  https://www.illumos.org/issues/3552
  https://www.illumos.org/issues/3564

Ported-by: Tim Chase <tim@chase2k.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #1513
This commit is contained in:
George Wilson
2013-06-14 22:30:35 -05:00
committed by Brian Behlendorf
parent c99c90015e
commit e51be06697
6 changed files with 327 additions and 112 deletions
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module/zfs/vdev.c
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@@ -1855,6 +1855,7 @@ vdev_dtl_sync(vdev_t *vd, uint64_t txg)
space_map_truncate(smo, mos, tx);
space_map_sync(&smsync, SM_ALLOC, smo, mos, tx);
space_map_vacate(&smsync, NULL, NULL);
space_map_destroy(&smsync);