On Monday 14 May 2007 14:05, Avi Kivity wrote: > But I agree that the growing code base is a problem. With the block > driver we can probably keep the host side in userspace, but to do the > same for networking is much more work. I do think (now) that it is doable.
Interesting. What kind of userspace networking do you have in mind? One of the first trys from Carsten was to use tun/tap, which proved to be slow performance-wise. What I had in mind was some kind of switch in userspace. That would allow non-root guests to define there own private networks. We could use Linux fast pipe implementation for guest-to-guest communication. The questions is how to connect user space networks to the host ones? - tun/tap is quite slow - last time we checked, netfiler offered only IP hooks (if you dont use the bridging code) - raw sockets get tricky if you do in/out at the same time because you have to manually deal with loops This reminds me, that we actually have another party doing virtual networking between guests: UML. User mode linux actually can do networking/switching in userspace, but I cannot tell how well UMLs concept works out. Christian ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ kvm-devel mailing list kvm-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kvm-devel
