From: "David S. Miller" <davem@redhat.com>
To: roy@karlsbakk.net
Cc: linux-kernel@vger.kernel.org
Subject: Re: [Q] e1000 hardware checksumming support?
Date: Wed, 16 Oct 2002 14:36:34 -0700 (PDT) [thread overview]
Message-ID: <20021016.143634.106131797.davem@redhat.com> (raw)
In-Reply-To: <200210161654.05783.roy@karlsbakk.net>
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
prev parent reply other threads:[~2002-10-16 21:39 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-10-16 14:54 Roy Sigurd Karlsbakk
2002-10-16 21:36 ` David S. Miller [this message]
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