netdev - Re: b44: Reset due to FIFO overflow.

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Date:	Wed, 30 Jun 2010 20:35:55 +0100
From:	James Courtier-Dutton <james.dutton@...il.com>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	Mitchell Erblich <erblichs@...thlink.net>, netdev@...r.kernel.org
Subject: Re: b44: Reset due to FIFO overflow.

On 29 June 2010 06:17, Eric Dumazet <eric.dumazet@...il.com> wrote:
>
> rx ring buffer is about 200 frames on b44. One single tcp flow should
> fit.
>
> Limit is 511. James, did you try to increase rx ring ?
>
> ethtool -G eth0 rx 511
>

Any value given to that command results in a non operating NIC.
rmmod b44
modprobe b44 fixes that.

I have narrowed down the problem now.
I can now reset the RX fifo after the RFO in less than 20 ms without
the Ethernet Link going down.
When I get a moment, I will post a patch so other people can test it.

Kind Regards

James
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