PERFORCE change 39284 for review
Warner Losh
imp at FreeBSD.org
Mon Oct 6 19:47:22 PDT 2003
http://perforce.freebsd.org/chv.cgi?CH=39284
Change 39284 by imp at imp_koguchi on 2003/10/06 19:46:55
update a little
Affected files ...
.. //depot/projects/power/notes#7 edit
Differences ...
==== //depot/projects/power/notes#7 (text+ko) ====
@@ -51,14 +51,9 @@
# methods should be unique. Command interfaces to userland should dispatch
# the right method. Otherwise we've reinvented ioctl :-)
- convert to a model of suspending the device via device_suspend()/resume()
- rather than detach()/attach()
+ rather than detach()/attach() for turning devices on/off.
- This may require fixes to drivers so that they continue to function
appropriately when their hardware has been suspended
- # NO. This cannot be implemented reliably. pccard bridges do not tell
- # us that a device has been removed while the system was asleep. That's
- # why we detach/reattach on suspend/resume for devices on pccard/cardbus
- # bridges. usb bridges can tell about this, and they properly use the
- # suspend/resume functions.
The second stage will be to make the powering off of devices more automated.
This is still in early design stage. It may involve a powerd, it may
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