I see the same with a Windows 10 guest on a Gentoo host. I tried setting nonblocking = 0; in vl.c as https://rafalcieslak.wordpress.com/2015/11/20/qemu-main-loop-warning-io-thread-spun-for-1000-iterations/ suggests, but that didn't solve the problem for me: the message is still there.
I see the same with a Windows 10 guest on a Gentoo host. I tried setting nonblocking = 0; in vl.c as https:/ /rafalcieslak. wordpress. com/2015/ 11/20/qemu- main-loop- warning- io-thread- spun-for- 1000-iterations / suggests, but that didn't solve the problem for me: the message is still there.