Also, in the meantime, maybe the problem can be prevented by preventing the balance from resuming when mounting. First umount then mount with -o skip_balance.
Chris Murphy -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html