From: Bernd Eckenfels <ecki-news2002-09@lina.inka.de> Date: Sat, 7 Sep 2002 00:58:25 +0200 thats why it makes sence to have zerocopy with hw-checksum. there is only a marginal time needed for a copy+chksum, but it is totally wasted time on zero copy environment. You don't understand. Because it is too complicated to zerocopy arbitrary anonymous user pages, we have to copy it into a stable kernel buffer. Because we have to copy, we checksum at the same time. If you want zerocopy for user created data, create a file for the process, mmap() it, write your contents, then sendfile() the thing to the socket. End of story. - : 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
