netdev - [RFC] r8169 : why SG / TX checksum are default disabled

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Message-ID: <1342564781.2626.1264.camel@edumazet-glaptop>
Date:	Wed, 18 Jul 2012 00:39:41 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Francois Romieu <romieu@...zoreil.com>
Cc:	netdev@...r.kernel.org, Hayes Wang <hayeswang@...ltek.com>
Subject: [RFC] r8169 : why SG / TX checksum are default disabled

Hi Francois

I was wondering why Scatter Gather (NETIF_F_SG) and TX checksum
(NETIF_F_IP_CSUM) were disabled by default on r8169.

Couldnt we enable them by default, maybe for a whitelist of "good"
nics ?

(I found that activating them with ethtool automatically enables GSO,
 and performance with GSO is not good)

Thanks


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