Messages in this thread | | | From | Oliver Neukum <> | Subject | Re: Questions about Runtime Power Management | Date | Mon, 17 Jun 2013 00:15:30 +0200 |
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On Sunday 16 June 2013 23:07:36 Ming Lei wrote: > On Mon, Jun 10, 2013 at 12:28 AM, Morales, Alejandra > <alejandra.morales@tum.de> wrote: > > > - Is runtime power management supported by net devices? > > Currently, 'struct net_device' doesn't support runtime power management, > and I submitted one patch to add the support for solving accessing > suspended device by 'ethtool', but it was rejected. > > http://marc.info/?t=135054860600003&r=1&w=2
And the discussion is still useful and true.
> But the physical device of the net device can support runtime PM, for example, > some PCIe network devices support runtime PM on link change, and usbnet > devices support auto suspend.
There is a design behind runtime PM. Runtime PM is involved if a device looses capabilities in a power saving state. Or if it is a dependency among runtime PM of devices. Therefore it is not used for things like Energy Efficient Ethernet.
Regards Oliver
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