https://bugs.freedesktop.org/show_bug.cgi?id=106175
--- Comment #20 from Michel Dänzer michel@daenzer.net --- Note that the ioctls don't literally run "in parallel"; both ioctls are called by the Xorg main thread, so they can't preempt each other. What I mean is that any number of cursor ioctls can happen while a page flip is pending.