On Sat, Apr 07, 2012, Steven wrote about "source for virt io backend driver": > Hi, > I would like to know where I can find the source for backend driver of > virtio device. For example, I know that the front-end net driver is >... > Can anyone help to point out where the source of net virtio backend in > the host kernel? If you use "normal" virtio, the backend is in qemu, i.e., host user space, *not* in the host kernel. So you need to look for it in qemu, not kvm. If you want the backend to be in the kernel, then you probably mean vhost-net. This you can find in drivers/vhost/net.c (and drivers/vhost/vhost.c for the generic vhost infrastructure for virtio drivers in the host kernel). Of course, also with vhost-net, qemu is involved in setting up this device. But qemu doesn't need to get involved in the data path (data, interrupts, etc.) which is done completely in the kernel, and therefore much more efficiently. -- Nadav Har'El | Sunday, Apr 8 2012, nyh@xxxxxxxxxxxxxxxxxxx |----------------------------------------- Phone +972-523-790466, ICQ 13349191 |Lottery: You need a dollar and a dream. http://nadav.harel.org.il |We'll take the dollar, you keep the dream. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
