diff options
Diffstat (limited to 'module/zfs/vdev.c')
| -rw-r--r-- | module/zfs/vdev.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/module/zfs/vdev.c b/module/zfs/vdev.c index 7751683d1..4c67792c9 100644 --- a/module/zfs/vdev.c +++ b/module/zfs/vdev.c @@ -793,6 +793,17 @@ vdev_remove_parent(vdev_t *cvd) cvd->vdev_orig_guid = cvd->vdev_guid; cvd->vdev_guid += guid_delta; cvd->vdev_guid_sum += guid_delta; + + /* + * If pool not set for autoexpand, we need to also preserve + * mvd's asize to prevent automatic expansion of cvd. + * Otherwise if we are adjusting the mirror by attaching and + * detaching children of non-uniform sizes, the mirror could + * autoexpand, unexpectedly requiring larger devices to + * re-establish the mirror. + */ + if (!cvd->vdev_spa->spa_autoexpand) + cvd->vdev_asize = mvd->vdev_asize; } cvd->vdev_id = mvd->vdev_id; vdev_add_child(pvd, cvd); |