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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.