netdev - Re: [RFC] net: napi fix

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Date:	Wed, 12 Dec 2007 15:05:26 +0900
From:	"Joonwoo Park" <joonwpark81@...il.com>
To:	"Stephen Hemminger" <shemminger@...ux-foundation.org>
Cc:	"David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, jgarzik@...ox.com,
	baum@...utinetworks.net, andy@...yhouse.net
Subject: Re: [RFC] net: napi fix

2007/12/12, Stephen Hemminger <shemminger@...ux-foundation.org>:
> Isn't this a better fix for all drivers, rather than peppering every
> driver with the special case. This is how the logic worked up until
> 2.6.24.
>
>
> --- a/net/core/dev.c    2007-12-11 12:16:20.000000000 -0800
> +++ b/net/core/dev.c    2007-12-11 21:43:39.000000000 -0800
> @@ -2184,7 +2184,7 @@ static void net_rx_action(struct softirq
>
>                have = netpoll_poll_lock(n);
>
> -               weight = n->weight;
> +               weight = min(n->weight, budget);
>
>                /* This NAPI_STATE_SCHED test is for avoiding a race
>                 * with netpoll's poll_napi().  Only the entity which
>

Stephen,
Could you explain how it fix the problem?
IMHO I think your patch cannot solve the problem.
The drivers can call netif_rx_complete and net_rx_action can do
list_move_tail also.
Am I missing something?

Thanks
Joonwoo
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