[systemd-devel] Need help with a systemd/mdadm interaction.

[Greg KH]

On Tue, Nov 12, 2013 at 11:31:45AM +1100, NeilBrown wrote:
> Alternately, is there some "all devices have been probed, nothing new will
> appear unless it is hot-plugged" event.  That would be equally useful (and
> probably mirrors what hardware-RAID cards do).

No, there's no way to ever know this in a hotplug world, sorry.
Especially with USB devices, they show up when they show up, there's no
"oh look, the bus is all scanned now and all devices currently plugged
in are found" type knowledge at all.

Then there are hotplug PCI systems where people slam in PCI cards
whenever they feel like it (remember, thunderbolt is PCI express...)

Sorry,

greg k-h