On Mon, 24 Sep 2007, Oliver Neukum wrote: > Am Montag 24 September 2007 schrieb Alan Stern: > > On Mon, 24 Sep 2007, Oliver Neukum wrote: > > > > > > subsystem implements its own form of runtime PM support, then you'll be > > > > able to use it properly. But until then, there isn't anything much you > > > > can do. > > > > > > Well, we can't simply cut power. Buffers must be flushed and the disk > > > spun down. The suspend() method of the storage driver will have to become > > > complex. > > > > That's right, if the device is a real disk. If it's a flash memory > > device then of course these issues don't arise. Unfortunately the > > driver isn't able to tell one from the other; the user will have to > > do that for us. > > So those devices which draw most power we don't suspend :-( > Furthermore for many devices it will take real user intervention to > determine what is in the enclosure. This isn't very good. I think > we can do better. If by "we" you mean the Linux kernel in general, then I agree. If by "we" you mean the USB developers, then I disagree. Help is needed from the SCSI people. Alan Stern - To unsubscribe from this list: 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
