linux-kernel - RE: [PATCH net-next 12/14] r8152: replace netif_rx withnetif_receive

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Date:	Wed, 19 Feb 2014 11:01:51 +0800
From:	hayeswang <hayeswang@...ltek.com>
To:	'Francois Romieu' <romieu@...zoreil.com>
CC:	<netdev@...r.kernel.org>, <nic_swsd@...ltek.com>,
	<linux-kernel@...r.kernel.org>, <linux-usb@...r.kernel.org>
Subject: RE: [PATCH net-next 12/14] r8152: replace netif_rx withnetif_receive_skb

 Francois Romieu [mailto:romieu@...zoreil.com] 
> Sent: Wednesday, February 19, 2014 7:29 AM
> To: Hayes Wang
> Cc: netdev@...r.kernel.org; nic_swsd@...ltek.com; 
> linux-kernel@...r.kernel.org; linux-usb@...r.kernel.org
> Subject: Re: [PATCH net-next 12/14] r8152: replace netif_rx 
> withnetif_receive_skb
> 
> Hayes Wang <hayeswang@...ltek.com> :
> > Replace netif_rx with netif_receive_skb to avoid disabling irq frequently
> > for increasing the efficiency.
> 
> read_bulk_callback is issued in irq context. It could thus use plain
> spin_lock / spin_unlock instead of the irq disabling version.

The rx_bottom() is called in tasklet, so I just think I could use
netif_receive_skb directly. The netif_rx seems to queue the packet,
and local_irq_disable() would be called before dequeuing the skb.
 
Best Regards,
Hayes

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