Re: question on flushing buffers and spinning down disk
Oliver Neukum <[email protected]>
| Newsgroups | gmane.linux.usb.devel,gmane.linux.scsi |
|---|---|
| Message-ID | <[email protected]> |
Am Donnerstag 27 September 2007 schrieb Alan Stern: > On Thu, 27 Sep 2007, Oliver Neukum wrote: > > > Am Dienstag 25 September 2007 schrieb Alan Stern: > > > Getting all this to work will be tricky, because sd is a block device > > > driven by requests issued through the block layer in atomic context, > > > whereas suspend and resume require a process context. Probably the > > > SCSI core would have to get involved in managing the synchronization. > > > > > > Well, > > > > here's a patch that seems to do what needs to be done to make it work. > > Oliver, I'm surprised at you! This patch is a big hack, not to mention > a layering violation and an inversion of the proper calling sequence. Well, 1. autosuspend should not be specific to USB 2. I like to view the generic SCSI code as a library 3. The low level drivers will have to decide whether to suspend devices, as the generic code doesn't know whether the bus is shared. Regards Oliver ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2005. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ [email protected] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel