Re: [PATCH 0/8] Convert USB over to the runtime PM framework

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On Wed, Feb 10, 2010 at 05:18:15PM +0100, Oliver Neukum wrote:
> Am Mittwoch, 10. Februar 2010 17:14:36 schrieb Greg KH:
> > On Wed, Feb 10, 2010 at 10:29:16AM -0500, Alan Stern wrote:
> > > For the moment, it's possible to autosuspend a card reader by setting
> > > its power/level attribute to "auto" and unbinding it from usb-storage.  
> > > Obviously this isn't suitable as a long-term solution but maybe it will 
> > > help satisfy the people nudging you.
> > 
> > I have those same people nudging me, and no, that will not work, as we
> > need to be able to support noticing a card has been put into the device
> > and mount it for the user :(
> 
> But not necessarily within 1 second. We could get some savings, if eg.
> we could lower the frequency of polling to 0.1 Hz or so.

So we should load/unload the usbstorage driver every few seconds?  That
would hit the disk and cause it to wake up, when at idle, we want it to
spin down and go to sleep as well.

thanks,

greg k-h
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