From: Andrew Theurer <andrewt@austin.rr.com>
To: linux-kernel@vger.kernel.org
Subject: Re: TCP zero-copy
Date: Fri, 3 Aug 2001 10:28:53 -0500 [thread overview]
Message-ID: <01080310285302.02989@linux> (raw)
In-Reply-To: <663CE32D.1D4A9213.0F45C3B8@netscape.net> <3B6A7B96.1591.241743@localhost>
In-Reply-To: <3B6A7B96.1591.241743@localhost>
On Friday 03 August 2001 04:23, wrote:
> I believe this behaviour is only possible for cards which have the
> ability to dma what appears as a list of skb data fragments and
> also has the ability to checksum the data. Namely the Alteon, now
> 3com, ACENIC and the sun hme device.
Intel now has an e1000 driver as well.
> Does this kernel modification completely remove the need for a
> copy/checksum of the data between user and kernel space on both
> transmit and receive ?
Transmit for sure. You should no longer see csum_partial_copy_generic() when
using zerocopy.
> I have written a driver for an Intel ixf1002 chip, which has some
> surrounding HW, and is capable of checksumming and processing
> dma in fragments. Is there any information on what changes I
> would have to make to the driver to support zerocopy/checksum ?
Which card is this?
Andrew Theurer
next prev parent reply other threads:[~2001-08-03 15:29 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <15210.4821.318434.454971@pizda.ninka.net>
2001-08-02 18:23 ` TCP zero-copy hochakhung
2001-08-03 9:23 ` simon
2001-08-03 15:28 ` Andrew Theurer [this message]
2001-08-06 0:32 ` Andi Kleen
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=01080310285302.02989@linux \
--to=andrewt@austin.rr.com \
--cc=linux-kernel@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox