linux-kernel - Re: [RFC] net: napi fix

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Message-Id: <20071213.143425.142750733.davem@davemloft.net>
Date:	Thu, 13 Dec 2007 14:34:25 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	jarkao2@...il.com
Cc:	auke-jan.h.kok@...el.com, gallatin@...i.com, joonwpark81@...il.com,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	jgarzik@...ox.com, shemminger@...ux-foundation.org,
	jesse.brandeburg@...el.com
Subject: Re: [RFC] net: napi fix

From: Jarek Poplawski <jarkao2@...il.com>
Date: Thu, 13 Dec 2007 23:28:41 +0100

> ...I'm afraid I can't understand: I mean doing the same but without
> passing this info with 'work == weight': if driver sends this info,
> why it can't instead call something like napi_continue() with
> this list_move_tail() (and probably additional local_irq_disable()/
> enble() - but since it's unlikely()?) which looks much more readable,
> and saves one whole unlikely if ()?

Because the poll list is private to net_rx_action() and we don't
want to expose implementation details like that to every
->poll() implementation.
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