Re: [PATCH] hyperv: Add netpoll support
From: Richard Weinberger
Date: Tue Jul 08 2014 - 18:53:35 EST
Am 09.07.2014 00:47, schrieb Francois Romieu:
> Richard Weinberger <richard@xxxxxx> :
>> This won't work as netpoll runs with IRQs disabled.
>> ->ndo_poll_controller() has to make sure that SKBs can be received and transmitted
>> while IRQs are off. I thought calling the channel callback by hand would be
>> enough to receive SKBs.
> What are you taking about ? netconsole does not need to receive.
Isn't netconsole is only one user of netpoll?
Of course netconsole needs only to transmit SKBs.
But if you look at other ->ndo_poll_controller implementations
you'll notice that they care also about receiving.
> hyperv start_xmit handler almost does its own Tx completion as you have
> noticed. The situation is imho close to a virtual device one as was veth
> in bb446c19fefd7b4435adb12a9dd7666adc5b553a.
Bad commit reference: bb446c19fefd7b4435adb12a9dd7666adc5b553a
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