Re: [PATCH RFC 0/3] add fc transport events

[Mike Christie <michaelc@cs.wisc.edu>]

Martin Peschke3 wrote:
> 
> 
> 
>>There are still some other large outstanding issues. For example the
>>kobject_hotplug function must be called from a process context. I was not
>>sure if the transport class should provide this, or is it the drivers
>>responsibilty (some drivers have threads for work already),
>>or should SCSI ML supply this as it may have to if it is going
>>to provide events too.
> 
> 
> The zfcp lldd also deploys threads to do link recovery. But I am not sure
> whether the event
> notifications we have been discussing would always fit into it. Other
> lldd's might have no
> threads at all. I tend to say that the midlayer should make sure that the
> actual hotplug
> calls are done in the right context in order to avoid duplicate pain in
> various lldds.

I will post my patch to handle this with a SCSI-ML workqueue. All transports
and SCSI-ML can then send an event without worrying about process context.