netdev - Re: qlge packet receive

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Message-ID: <20090203160815.GA11735@linux-ox1b.qlogic.org>
Date:	Tue, 3 Feb 2009 08:08:15 -0800
From:	Ron Mercer <ron.mercer@...gic.com>
To:	David Miller <davem@...emloft.net>
Cc:	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Re: qlge packet receive

On Mon, Feb 02, 2009 at 02:01:15PM -0800, David Miller wrote:
> 
> I wanted to mention a bug that I noticed in the qlge driver
> while perusing NAPI capable drivers last week.
> 
> Although qlge uses NAPI polling, it passes packets into the
> stack using netif_rx() and vlan_hwaccel_rx().
> 
> That's wrong and incredibly inefficient, because these routines
> are for the cases where the driver receives packets in hardware
> interrupt context, so they schedule a new software interrupt to
> process the frames.
> 
> NAPI ->poll() executes in software interrupt context so you can
> pass the packets directly into the stack using netif_receive_skb()
> and vlan_hwaccel_receive_skb().


Thanks Dave.  I've changed this and also added gro to my net-next
branch.  I will send up this bugfix up for 2.6.29 in a few days.

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