Hi Stefan, this indeed helps, thank you. Keqian
On Mon, 16 Jan 2023 at 03:20, zhukeqian via <qemu-devel@nongnu.org<mailto:qemu-devel@nongnu.org>> wrote: > And if IO operation is blocked, is vCPU thread will blocked when do > deactivate? Yes, blk_drain() is a synchronous function. It blocks until in-flight I/O has finished. The vcpu thread will be blocked in virtio_pci_common_write(). Stefan
