Now I understand it. I was missing this crucial link. Thanx for the answers. tomar On Mon, 18 Aug 2003, David S. Miller wrote: > On Sun, 17 Aug 2003 23:18:58 +0530 (IST) > Nagendra Singh Tomar <nagendra_tomar@adaptec.com> wrote: > > > My statement, that buffer gets copied to an skbuff, is not for the > > senfile(), but for sendmsg() case. The counterpart for this in the > > case of sendfile() (using mmaped temp file) is the copy from the user > > buffer to the file's page cache, when we write to the pointer returned > by > > mmap() on the temp file. > > I can not see any difference in number of copies. > > You don't understand, the mmap()'d temp file _IS_ the user's > buffer. > > Instead of storing into a malloc()'d or local stack buffer, > the user stores it's data directly into the mmap() area. > - : send the line "unsubscribe linux-net" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
