Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> wrote: > From a quick look, what you were doing was checking that the patterns > you set up in user space came through ok. Dammit, what's wrong with > just using read()/write() on a pipe, or splice, or whatever. It will > test exactly the same iov_iter thing. I was trying to make it possible to do these tests before starting userspace as there's a good chance that if the UBUF/IOVEC iterators don't work right then your system can't be booted. Anyway, if I drop patches 5, 6, 7 and 10 (ie. the ones doing stuff with UBUF and IOVEC-type iterators), would you be okay with the rest? David