When opening a log device during import its allocation bias will
not yet have been set by vdev_load(). This results in the log
device's ashift being incorrectly applied to the maximum ashift
of the vdevs in the normal class. Which in turn prevents the
removal of any top-level devices due to the ashift check in the
spa_vdev_remove_top_check() function.
This issue is resolved by including vdev_islog in the check since
it will be set correctly during vdev_open().
Reviewed-by: Matt Ahrens <mahrens@delphix.com>
Reviewed-by: Igor Kozhukhov <igor@dilos.org>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes#8735
