On Fri, 13 Jun 2014, David Herrmann wrote: > Setting SEAL_WRITE is not possible if there're pending GUP users. This > commit adds selftests for memfd+sealing that use FUSE to create pending > page-references. FUSE is very helpful here in that it allows us to delay > direct-IO operations for an arbitrary amount of time. This way, we can > force the kernel to pin pages and then run our normal selftests. > > Signed-off-by: David Herrmann <dh.herrmann@xxxxxxxxx> I had a number of problems in getting this working (on openSUSE 13.1): rpm told me I had fuse installed, yet I had to download and install the tarball to get header files needed; then "make fuse_mnt" told me to add -D_FILE_OFFSET_BITS=64 to the compile flags; after which I got "undefined reference to `fuse_main_real'"; but then I tried "make run_fuse" as root, and it seemed to sort these issues out for itself, aside from "./run_fuse_test.sh: Permission denied" - which was within my bounds of comprehension unlike the rest! No complaint, thanks for providing the test (though I didn't check the source to convince myself that "DONE" has done what's claimed): some rainy day someone can get the Makefile working more smoothly, no need to delay the patchset for this. Hugh -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>