On Thu, Feb 17, 2022 at 09:54:30PM -0500, Theodore Ts'o wrote: > process_vm_writev() uses [un]pin_user_pages_remote() which is the same > interface uses for RDMA. But it's not clear this is ever supposed to > work for memory which is mmap'ed region backed by a file. > pin_user_pages_remote() appears to assume that it is an anonymous > region, since the get_user_pages functions in mm/gup.c don't call > read_page() to read data into any pages that might not be mmaped in. ... it doesn't end up calling handle_mm_fault() in faultin_page()?
