On Thu, Sep 24 2020 at 2:51am -0400, Christoph Hellwig <hch@xxxxxx> wrote: > Drivers shouldn't really mess with the readahead size, as that is a VM > concept. Instead set it based on the optimal I/O size by lifting the > algorithm from the md driver when registering the disk. Also set > bdi->io_pages there as well by applying the same scheme based on > max_sectors. To ensure the limits work well for stacking drivers a > new helper is added to update the readahead limits from the block > limits, which is also called from disk_stack_limits. > > Signed-off-by: Christoph Hellwig <hch@xxxxxx> > Acked-by: Coly Li <colyli@xxxxxxx> > Reviewed-by: Johannes Thumshirn <johannes.thumshirn@xxxxxxx> Thanks for adding blk_queue_update_readahead() Reviewed-by: Mike Snitzer <snitzer@xxxxxxxxxx>
