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OpenZFS 9434 - Speculative prefetch is blocked by device removal code 

Device removal code does not set spa_indirect_vdevs_loaded for pools
that never experienced device removal.  At least one visual consequence
of it is completely blocked speculative prefetcher.  This patch sets
the variable in such situations.

Authored by: Alexander Motin <mav@FreeBSD.org>
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Reviewed by: Prashanth Sreenivasa <pks@delphix.com>
Reviewed-by: George Melikov <mail@gmelikov.ru>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Tim Chase <tim@chase2k.com>
Approved by: Matt Ahrens <mahrens@delphix.com>
Ported-by: Giuseppe Di Natale <dinatale2@llnl.gov>

OpenZFS-issue: https://www.illumos.org/issues/9434
OpenZFS-commit: https://github.com/openzfs/openzfs/commit/16127b627b
Closes #7480
This commit is contained in:
Alexander Motin 2018-04-03 14:57:15 -04:00 committed by Brian Behlendorf
parent eb201f50ac
commit 20507534d4
1 changed files with 1 additions and 0 deletions
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1
module/zfs/vdev_removal.c
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@ -352,6 +352,7 @@ spa_remove_init(spa_t *spa)
spa->spa_removing_phys.sr_state = DSS_NONE;
spa->spa_removing_phys.sr_removing_vdev = -1;
spa->spa_removing_phys.sr_prev_indirect_vdev = -1;
spa->spa_indirect_vdevs_loaded = B_TRUE;
return (0);
} else if (error != 0) {
return (error);