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OpenZFS 9700 - ZFS resilvered mirror does not balance reads

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Authored by: Jerry Jelinek <jerry.jelinek@joyent.com>
Reviewed by: Toomas Soome <tsoome@me.com>
Reviewed by: Sanjay Nadkarni <sanjay.nadkarni@nexenta.com>
Reviewed by: George Wilson <george.wilson@delphix.com>
Reviewed-by: George Melikov <mail@gmelikov.ru>
Reviewed-by: Richard Elling <Richard.Elling@RichardElling.com>
Approved by: Matthew Ahrens <mahrens@delphix.com>
Ported-by: Brian Behlendorf <behlendorf1@llnl.gov>

OpenZFS-issue: https://illumos.org/issues/9700
OpenZFS-commit: https://github.com/openzfs/openzfs/commit/82f63c3c
Closes #7973
This commit is contained in:
Jerry Jelinek 2018-08-30 13:13:30 +00:00 committed by Brian Behlendorf
parent cb110f254e
commit f65fbee1e7
1 changed files with 4 additions and 0 deletions
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4
module/zfs/spa.c
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@ -28,6 +28,7 @@
* Copyright (c) 2014 Integros [integros.com]
* Copyright 2016 Toomas Soome <tsoome@me.com>
* Copyright (c) 2016 Actifio, Inc. All rights reserved.
* Copyright 2018 Joyent, Inc.
* Copyright (c) 2017 Datto Inc.
* Copyright 2017 Joyent, Inc.
* Copyright (c) 2017, Intel Corporation.
@ -6703,6 +6704,7 @@ spa_vdev_resilver_done_hunt(vdev_t *vd)
/*
* Check for a completed resilver with the 'unspare' flag set.
* Also potentially update faulted state.
*/
if (vd->vdev_ops == &vdev_spare_ops) {
vdev_t *first = vd->vdev_child[0];
@ -6724,6 +6726,8 @@ spa_vdev_resilver_done_hunt(vdev_t *vd)
!vdev_dtl_required(oldvd))
return (oldvd);
vdev_propagate_state(vd);
/*
* If there are more than two spares attached to a disk,
* and those spares are not required, then we want to