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Date: Wed, 2 Apr 2003 15:36:53 -0500
From: Jeff Garzik <jgarzik@pobox.com>
To: Dennis Cook <cook@sandgate.com>
Cc: linux-kernel@vger.kernel.org, kernelnewbies@nl.linux.org
Subject: Re: Deactivating TCP checksumming
Message-ID: <20030402203653.GA2503@gtf.org>
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On Wed, Apr 02, 2003 at 02:22:59PM -0500, Dennis Cook wrote:
> Using RH Linux kernel 2.4.18, setting "features" bit NETIF_F_IP_CSUM does
> not appear
> to keep a valid IP checksum from being computed in packets presented to my
> driver
> for transmission. So having HW compute outgoing checksum buys nothing.

You are not using sendfile(2), which is required to activate h/w csum.

	Jeff