On Tue, May 29, 2018 at 3:59 PM, Christoph Hellwig <hch@xxxxxxxxxxxxx> wrote: >> vfs: add f_op->pre_mmap() > > We've been through these pre-mmap games a few times, and always rejected > them, why is this any different? Don't know what the other cases were. Overlayfs case is completely state free. It just does a copy-up in the case of a shared mapping so that subsequent modifications of that file get reflected in the shared mapping. Can't do the copy-up with mmap_sem held due to locking depencencies. > >> vfs: export vfs_dedupe_file_range_one() to modules > > Please use EXPORT_SYMBOL_GPL for all these crazy low-level exports. > > To be homest I'd really like to see the whole thing as a patch series > instead of a pull request. Very little seems to have gotten any > reviewed-by tags which makes me very suspicious. Did a couple of iterations and got some good feedback. But can post the current version, if you think that's useful. Thanks, Miklos
