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Message-ID: <1397756852.13168.42.camel@LTIRV-MCHAN1.corp.ad.broadcom.com>
Date:	Thu, 17 Apr 2014 10:47:32 -0700
From:	Michael Chan <mchan@...adcom.com>
To:	Ivan Vecera <ivecera@...hat.com>
CC:	<netdev@...r.kernel.org>
Subject: Re: [PATCH net] tg3: update rx_jumbo_pending ring param only when
 jumbo frames are enabled

On Thu, 2014-04-17 at 14:51 +0200, Ivan Vecera wrote: 
> The patch fixes a problem with dropped jumbo frames after usage of
> 'ethtool -G ... rx'.
> 
> Scenario:
> 1. ip link set eth0 up
> 2. ethtool -G eth0 rx N # <- This zeroes rx-jumbo
> 3. ip link set mtu 9000 dev eth0
> 
> The ethtool command set rx_jumbo_pending to zero so any received jumbo
> packets are dropped and you need to use 'ethtool -G eth0 rx-jumbo N'
> to workaround the issue.
> The patch changes the logic so rx_jumbo_pending value is changed only if
> jumbo frames are enabled (MTU > 1500).
> 
> Signed-off-by: Ivan Vecera <ivecera@...hat.com>

Acked-by: Michael Chan <mchan@...adcom.com>


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