Re: [linux-pm] [PATCH 02/11] PM: extend PM QoS with per-device wake-up constraints

On Saturday, August 20, 2011, Mark Brown wrote:

On Sat, Aug 20, 2011 at 09:48:25AM -0400, Alan Stern wrote:

quoted

No, I as wasking about driver- and subsystem-specific interfaces to
userspace that translate into things users are already doing.  Kevin's
example was a touchscreen (although that was really an example of
setting a power usage level, not a latency constraint).  Do you have
any others?

Any sort of media streaming would be an obvious example - the
application picks the amount of data it buffers and how often it's
notified of progress depending on the usage which then controls how
quickly the system needs to handle things.

Well, what about other types of devices?