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Subject: Re: sendfile support in linux
From: Gianni Tedesco <gianni@ecsc.co.uk>
To: Stanley Yee <SYee@snapappliance.com>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
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On Tue, 2003-01-28 at 01:45, Stanley Yee wrote:
> I'm trying to find out more about sendfile(2).  So far, from what I've
> gathered, it sounds like the requirements for it are (please correct me i=
f
> I'm wrong):
>=20
> 1.  A kernel with sendfile support (i.e. 2.4.X)
> 2.  A network card capable of doing the TCP checksum in the hardware
> 3.  The application must support sendfile=20

Those are the user requirements yes. Of course the programmer only needs
to assume (1) to start writing applications. Oh and its probably worth
mentioning:

 4. You can't do zero-copy receive.

> Do you know what applications support zerocopy (sendfile)?  I noticed tha=
t a
> zerocopy NFS patch was added to the 2.5.x tree.  Does the 2.4.X NFS daemo=
n
> support zerocopy?  Does samba support zerocopy and if so what version?

Samba, tux2, apache?, all the big stuff.

Dunno about NFS.

--=20
// Gianni Tedesco (gianni at scaramanga dot co dot uk)
lynx --source www.scaramanga.co.uk/gianni-at-ecsc.asc | gpg --import
8646BE7D: 6D9F 2287 870E A2C9 8F60 3A3C 91B5 7669 8646 BE7D

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