Re: Linux Zero Copy

From: Jamie Lokier (jamie@shareable.org)
Date: Wed Aug 13 2003 - 11:10:02 EST


Nagendra Singh Tomar wrote:
> Code walkthru of Linux 2.4.18 kernel reveals that we do copy from user
> space for both linear and nonlinear skbuffs. What is this zerocopy thing
> then ?

Take a look at the sendfile() system call. There is no user space
data; it can do zerocopy from the page cache.

-- Jamie
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