On Mon, 26 Jul 2021 20:09:06 -0300 Jason Gunthorpe <jgg@xxxxxxxxxx> wrote: > On Mon, Jul 26, 2021 at 07:07:04PM +0200, Cornelia Huck wrote: > > > But I wonder why nobody else implements this? Lack of surprise removal? > > The only implementation triggers an eventfd that seems to be the same > eventfd as the interrupt.. > > Do you know how this works in userspace? I'm surprised that the > interrupt eventfd can trigger an observation that the kernel driver > wants to be unplugged? I think we're talking about ccw, but I see QEMU registering separate eventfds for each of the 3 IRQ indexes and the mdev driver specifically triggering the req_trigger...? Thanks, Alex
