On 28/11/2016 16:29, Stefan Hajnoczi wrote: > Thanks for sharing the link. I'll let you know before embarking on an > effort to make epoll support busy_loop. > > At the moment I'm still evaluating whether the good results we've gotten > from polling in QEMU userspace are preserved when polling is shifted to > the kernel. > > FWIW I've prototyped ioctl(EVENTFD_SET_POLL_INFO) but haven't had a > chance to test it yet: > https://github.com/stefanha/linux/commit/133e8f1da8eb5364cd5c5f7162decbc79175cd13
This would add a system call every time the main loop processes a vring, wouldn't it? Paolo
