Re: copy offload support in Linux - new system call needed?

On 12/14/2011 11:59 AM, Jeremy Allison wrote:

quoted

Can we resurrect this effort? Is copyfile() still a good way to go,
or should we look at other hooks?

Windows uses a COPYCHUNK call, which specifies the
following parameters:

Definition of a copy "chunk":

hyper source_off;
hyper target_off;
uint32 length;

and an array of these chunks which is passed
into their kernel.

This is what we have to implement in Samba.

Could we do this by (re-)allowing sendfile() between two files?

	-hpa