Messages in this thread | | | Date | Fri, 15 Aug 2008 00:11:06 +0200 | From | Stefan Richter <> | Subject | Re: Power management for SCSI |
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Pavel Machek wrote: >> https://lists.linux-foundation.org/pipermail/linux-pm/2008-March/016849.html ... > First the general comments/questions: > > # > #1. It's done at the wrong level: suspend "device" is actually a target > #function. There's no way on a multi-lun device we want to keep the > #flags and last_busy anywhere but in the target > > So... if there's one device with Lun0==cdrom1 and Lun1==cdrom2, it is a > single target, and we want to keep flags/last busy common to all that?
Actually a command set driver like sd surely wants last_busy (time of last use) separate for each LU for auto-spindown, doesn't it?
I'm not sure about the rest, i.e. delay, counter, flags.
> What is good data structure to add? I see scsi_tgt*.h, but it is very > short, and there does not seem to be good structure to hook into.
include/scsi/scsi_tgt*.h are for local target implementations. The representation of "remote" targets, as seen by local initiators, is include/scsi/scsi_device.h's struct scsi_target. -- Stefan Richter -=====-==--- =--- -===- http://arcgraph.de/sr/
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