On Tue, 22 Sep 2020 at 15:04, Daniel Vetter <daniel.vetter@xxxxxxxx> wrote: > On Tue, Sep 22, 2020 at 3:36 PM Marius Vlad <marius.vlad@xxxxxxxxxxxxx> wrote: > > Gentle ping. I've tried out Linus's master tree and, and like Pekka, > > I've noticed this isn't integrated/added. > > Defacto the uapi we have now is that userspace needs to ignore "spurious" EBUSY. This really, really, really, bites. I think we need a guarantee that this never happens if ALLOW_MODESET is always used in blocking mode, plus in future a cap we can use to detect that we won't be getting spurious EBUSY events. I really don't want to ever paper over this, because it's one of the clearest indications that userspace has its timing/signalling wrong. Cheers, Daniel
