Comment 2 for bug 1885419

I too get this after an upgrade and I can add only a couple of things to Viktor's report. I've tried both aio=native and aio=threads with same result. Unlike Viktor, I'm using virtio-blk-pci with raw images.

With both aio=native and aio=threads:
qemu-system-x86_64: /build/qemu-v_zvmu/qemu-2.11+dfsg/util/aio-posix.c:592: aio_poll: Assertion `in_aio_context_home_thread(ctx)' failed.

$ apt-cache policy qemu-kvm
qemu-kvm:
  Installed: 1:2.11+dfsg-1ubuntu7.27
  Candidate: 1:2.11+dfsg-1ubuntu7.27