Hello!

On Sat, May 13, 2017 at 12:02:13PM +0800, Muhui Jiang wrote:

> Thanks for your great answer. you mentioned that sendfile() is to copy
> between kernel space and userland. I am curious, why this whole process
> don't need to malloc any memory? Could you please explain more on the
> detail implementation of the sendfile(). Many Thanks

No, I said that sendfile() avoids copying between kernel space and
userland. The sendfile() system call is to send a file to a
socket. As such, it allows nginx to simply open the file
requested by a client and then call sendfile() to instruct OS to
transfer it to the socket.

--
Maxim Dounin
http://nginx.org/
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