On 22/07/2020 08:27, Christoph Hellwig wrote: > + q->backing_dev_info->ra_pages = > + max(queue_io_opt(q) * 2 / PAGE_SIZE, VM_READAHEAD_PAGES); Dumb question, wouldn't a '>> PAGE_SHIFT' be better instead of a potentially costly division? Or aren't we caring at all as it's a) not in the fast-path and b) compilers can optimize it to a shift?
