netdev - Re: [PATCH] hyperv: Add netpoll support

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Date:	Wed, 9 Jul 2014 01:43:38 +0200
From:	Francois Romieu <romieu@...zoreil.com>
To:	Richard Weinberger <richard@....at>
Cc:	KY Srinivasan <kys@...rosoft.com>,
	Haiyang Zhang <haiyangz@...rosoft.com>,
	"devel@...uxdriverproject.org" <devel@...uxdriverproject.org>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] hyperv: Add netpoll support

Richard Weinberger <richard@....at> :
> Am 09.07.2014 00:47, schrieb Francois Romieu:
[...]
> > What are you taking about ? netconsole does not need to receive.
> 
> Isn't netconsole is only one user of netpoll ?

Out of tree users are irrelevant. See netpoll related comments in
cd6362befe4cc7bf589a5236d2a780af2d47bcc9

> 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.

It's just the long, illuminating history of netpoll :o)

Some limited Rx netpoll support may be done but it needs more work
than was originally advertised.

> > 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

Sorry, it currently belongs to davem's net-next.

-- 
Ueimor
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