Hello, Luis.

On Mon, Sep 08, 2014 at 06:04:23PM -0700, Luis R. Rodriguez wrote:

quoted

I have no idea how the selection should be.  It could be per-insmod or
maybe just a system-wide flag with explicit exceptions marked on
drivers is good enough.  I don't know.

Its perfectly understandable if we don't know what path to take yet
and its also understandable for it to take time to figure out --
meanwhile though systemd already has merged a policy of a 30 second
timeout for *all drivers* though so we therefore need:

I'm not too convinced this is such a difficult problem to figure out.
We already have most of logic in place and the only thing missing is
how to switch it.  Wouldn't something like the following work?

* Add a sysctl knob to enable asynchronous device probing on module
  load and enable asynchronous probing globally if the knob is set.

* Identify cases which can't be asynchronous and make them
  synchronous.  e.g. keep who's doing request_module() and avoid
  asynchronous probing if current is probing one of those.

Thanks.

-- 
tejun