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Date: Wed, 16 Oct 2002 14:36:34 -0700 (PDT)
Message-Id: <20021016.143634.106131797.davem@redhat.com>
To: roy@karlsbakk.net
Cc: linux-kernel@vger.kernel.org
Subject: Re: [Q] e1000 hardware checksumming support?
From: "David S. Miller" <davem@redhat.com>
In-Reply-To: <200210161654.05783.roy@karlsbakk.net>
References: <200210161654.05783.roy@karlsbakk.net>
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   From: Roy Sigurd Karlsbakk <roy@karlsbakk.net>
   Date: Wed, 16 Oct 2002 16:54:05 +0200
   
   Can Linux 2.4 use the hardware checksumming in the e1000 adapter?

Two things:

1) On output you only get checksumming if your applications
   use sendfile()

2) On input, since we have to copy the data anyways, we use
   csum_partial_copy because it costs the same as a memcpy.

   Actually, on some x86 cpus the checksum+copy is faster
   than the memcpy, but that is being fixed in current 2.5.x

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