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Message-ID: <3436418.fmSDhCQZH6@linux-5eaq.site> Date: Mon, 17 Jun 2013 00:15:30 +0200 From: Oliver Neukum <oliver@...kum.org> To: Ming Lei <tom.leiming@...il.com> Cc: "Morales, Alejandra" <alejandra.morales@....de>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org> Subject: Re: Questions about Runtime Power Management On Sunday 16 June 2013 23:07:36 Ming Lei wrote: > On Mon, Jun 10, 2013 at 12:28 AM, Morales, Alejandra > <alejandra.morales@....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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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