Hi On Tue, Apr 21, 2015 at 11:35 AM, One Thousand Gnomes <gno...@lxorguk.ukuu.org.uk> wrote: >> On top of that, I think that someone into resource management needs to >> seriously consider whether having a broadcast send do get_user_pages >> or the equivalent on pages supplied by untrusted recipients (plural!) >> is a good idea. > > Oh but its so much fun if you pass pages belonging to a device driver, or > pass bits of a GEM object thereby keeping entire graphics textures > referenced 8)
We do not use GUP, nor do we pass around pinned pages. All we use is __vfs_read() / __vfs_write() on shmem. Whether generic_file_write() / copy_from_user() internally relies on GUP or not, is an orthogonal issue that does not belong here. Thanks David -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
