"If the swap partition is busy, then you can't change the partition table *at all* and expect the kernel to notice. (Well, you could change the partition table on a different disk.)"
This is no longer the case today; as long as you don't change the swap partition itself, then there's no need to unmount it.
"If the swap partition is busy, then you can't change the partition table *at all* and expect the kernel to notice. (Well, you could change the partition table on a different disk.)"
This is no longer the case today; as long as you don't change the swap partition itself, then there's no need to unmount it.