On Fri, Nov 15, 2019 at 11:06 AM Rafael J. Wysocki <rjw@xxxxxxxxxxxxx> wrote: > > On Wednesday, November 6, 2019 12:54:59 PM CET Zhenzhong Duan wrote: > > dev->poll_limit_ns could be zeroed in certain cases (e.g. by > > guest_halt_poll_ns = 0). If guest_halt_poll_grow_start is zero, > > dev->poll_limit_ns will never be bigger than zero. > > Given that haltpoll_enable_device() sets dev->poll_limit_ns = 0 to start with, > I don't think that the statement above is correct. Scratch this, I misread it.