On Tue, Apr 26, 2005 at 11:18:07AM -0400, Luben Tuikov wrote: > On 04/25/05 14:18, Christoph Hellwig wrote: > > The point is that discovery must happen for each HBA separately because > > we absolutely do not want to have global state. > > OK. > > Can you please define "global state"? Sure, quoting your initial mail: /---------------------------------------------------------------------- | 2. Sysfs SAS Domain | ------------------- | | Represent everything which "sits out there" in the SAS | domain, irrespective of how you connect to it. | | /sys/bus/sas/ | /sys/bus/sas/<WWN_ta0>/ | /sys/bus/sas/<WWN_ta0>/phys/ | | ... \---------------------------------------------------------------------- Here you have a global hiearchy. We are not interested in that, though - we only care for what's visible from a certain HBA. > In SAS, when the domain changes, the controller(s) connected to the > domain get notification and pass it to the discovery process, which > will run again. Same as with fibre channel, and that's fine and expected. > Overall, since the discovery process gets (internally) a "picture" > of the domain out there, it would be appropriate to show this > "picture" to the user. Absolutely. - : send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
