2003-02-06 22:58:03

by Venkat Raghu

[permalink] [raw]
Subject: zero copy



Hi,

What is zero copy mechanism in ethernet drivers.

Regards
Venkat

__________________________________________________
Do you Yahoo!?
Yahoo! Mail Plus - Powerful. Affordable. Sign up now.
http://mailplus.yahoo.com


2003-02-07 09:55:29

by Emiliano Gabrielli

[permalink] [raw]
Subject: Re: zero copy



<quote who="Venkat Raghu">
>
>
> Hi,
>
> What is zero copy mechanism in ethernet drivers.
>
> Regards
> Venkat

Zero copy is intended to bypass the need of copying the user space buffer in kernel
space via copy_from_user.

It is achieved by mapping dma buffer in user space for exaple so that eth driver can
directly use them for dma

--
Emiliano Gabrielli

dip. di Fisica
2? Universit? di Roma "Tor Vergata"


--
Emiliano Gabrielli

dip. di Fisica
2? Universit? di Roma "Tor Vergata"