Le 16/09/2010 08:32, Brice Goglin a écrit : > I am the guy doing KNEM so I can comment on this. The I/OAT part of KNEM > was mostly a research topic, it's mostly useless on current machines > since the memcpy performance is much larger than I/OAT DMA Engine. We > also have an offload model with a kernel thread, but it wasn't used a > lot so far. These features can be ignored for the current discussion. I've just created a knem branch where I removed all the above, and some other stuff that are not necessary for normal users. So it just contains the region management code and two commands to copy between regions or between a region and some local iovecs. Commands are visible at (still uses ioctls since it doesn't matter while discussing the features): https://gforge.inria.fr/scm/viewvc.php/*checkout*/branches/kernel/driver/linux/knem_main.c?root=knem&content-type=text%2Fplain And the actual driver is at: https://gforge.inria.fr/scm/viewvc.php/*checkout*/branches/kernel/common/knem_io.h?root=knem&content-type=text%2Fplain Brice -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>