a167aa7cd4
Be sure to invalidate a vdev's cache before performing a zpool labelclear. There are cases where the cache is stale because we did some operation that bypassed it, and since we are doing an open with only O_RDWR, we should invalidate it to be safe. Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Giuseppe Di Natale <dinatale2@llnl.gov> Closes #6009