From: Steve Whitehouse <steve@gw.chygwyn.com>
To: davem@redhat.com (David S. Miller)
Cc: ionut@cs.columbia.edu (Ion Badulescu),
kuznet@ms2.inr.ac.ru, linux-kernel@vger.kernel.org,
andrewm@uow.EDU.AU (Andrew Morton)
Subject: Re: [UPDATE] Zerocopy patches, against 2.4.1-pre10
Date: Thu, 25 Jan 2001 21:29:44 +0000 (GMT) [thread overview]
Message-ID: <200101252129.VAA13948@gw.chygwyn.com> (raw)
In-Reply-To: <14960.38705.859136.36297@pizda.ninka.net> from "David S. Miller" at Jan 25, 2001 01:14:25 PM
Hi,
Do you mean that devices will not be able to indicate support of SG seperately
from hw checksum or that the IP zerocopy will simply ignore devices which
do not have both ?
DECnet assumes that the mac level checksum will detect all errors and does
not have a checksum of its own on data, so it would only need SG to benefit
from the zerocopy framework,
Steve.
>
>
> Ion Badulescu writes:
> > I'm just wondering, if a card supports sg but *not* TX csum, is it worth
> > it to make use of sg? eepro100 falls into this category..
>
> No, not worth it for now. In fact I'm going to mark that combination
> (sg without csum) as illegal in the final zerocopy patch I end up
> sending to Linus.
>
> Later,
> David S. Miller
> davem@redhat.com
> -
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next prev parent reply other threads:[~2001-01-25 21:32 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <200101242123.NAA00986@pizda.ninka.net>
2001-01-25 1:40 ` [UPDATE] Zerocopy patches, against 2.4.1-pre10 Andrew Morton
2001-01-25 19:29 ` kuznet
2001-01-25 20:28 ` Ion Badulescu
2001-01-25 20:36 ` kuznet
2001-01-25 20:43 ` David S. Miller
2001-01-25 21:11 ` Ion Badulescu
2001-01-26 19:43 ` kuznet
2001-01-29 22:02 ` David S. Miller
2001-01-25 21:14 ` David S. Miller
2001-01-25 21:29 ` Steve Whitehouse [this message]
2001-01-31 16:04 ` Alan Cox
2001-03-11 20:55 ` NBD Fix (attempt #2) Steve Whitehouse
2001-01-25 21:38 ` [UPDATE] Zerocopy patches, against 2.4.1-pre10 David S. Miller
2001-01-26 6:06 ` Ion Badulescu
2001-01-26 13:13 ` David S. Miller
2001-01-26 20:43 ` Ion Badulescu
2001-01-27 0:55 ` Ion Badulescu
2001-01-27 18:39 ` kuznet
2001-01-27 21:18 ` Ion Badulescu
2001-01-30 6:02 ` David S. Miller
2001-01-26 1:27 ` Andrew Morton
2001-01-25 9:29 ` David S. Miller
2001-01-24 21:52 Jonathan Earle
2001-01-24 23:33 ` Peter Samuelson
-- strict thread matches above, loose matches on Subject: below --
2001-01-24 21:34 Jonathan Earle
2001-01-24 21:45 ` Mathieu Chouquet-Stringer
2001-01-31 22:42 ` Rogerio Brito
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