On Wed, 30 Jan 2019 14:22:07 +0100 Cornelia Huck <cohuck@xxxxxxxxxx> wrote: > When we get a solicited interrupt, the start function may have > been cleared by a csch, but we still have a channel program > structure allocated. Make it safe to call the cp accessors in > any case, so we can call them unconditionally. I read this like it is supposed to be safe regardless of parallelism and threads. However I don't see any explicit synchronization done for cp->initialized. I've managed to figure out how is that supposed to be safe for the cp_free() (which is probably our main concern) in vfio_ccw_sch_io_todo(), but if fail when it comes to the one in vfio_ccw_mdev_notifier(). Can you explain us how does the synchronization work? Regards, Halil
