On Thu, Jan 19, 2023 at 02:11:19AM +0000, Al Viro wrote: > PS: Documentation/driver-api/pci/p2pdma.rst seems to imply that those > pages should not be possible to mmap, so either that needs to be > updated, or... how the hell could we run into those in g-u-p, > anyway? Really confused... Yes, that needs an update. That limitation was from before the mmap support was added.