On 4/8/20 7:29 AM, Xiaoguang Wang wrote: > In io_read_prep() or io_write_prep(), io_req_map_rw() takes > struct io_async_rw's fast_iov as argument to call io_import_iovec(), > and if io_import_iovec() uses struct io_async_rw's fast_iov as > valid iovec array, later indeed io_req_map_rw() does not need > to do the memcpy operation, because they are same pointers. Applied, thanks. -- Jens Axboe