I'm sending this mail for another chance of review. Thanks, SeongJae Park On Thu, May 3, 2018 at 6:53 PM SeongJae Park <sj38.park@xxxxxxxxx> wrote: > This commit sets QUEUE_FLAG_NONROT and clears up QUEUE_FLAG_ADD_RANDOM > to mark the ramdisks as non-rotational device. > Signed-off-by: SeongJae Park <sj38.park@xxxxxxxxx> > --- > drivers/block/brd.c | 4 ++++ > 1 file changed, 4 insertions(+) > diff --git a/drivers/block/brd.c b/drivers/block/brd.c > index 66cb0f857f64..39c5b90cc187 100644 > --- a/drivers/block/brd.c > +++ b/drivers/block/brd.c > @@ -402,6 +402,10 @@ static struct brd_device *brd_alloc(int i) > set_capacity(disk, rd_size * 2); > disk->queue->backing_dev_info->capabilities |= BDI_CAP_SYNCHRONOUS_IO; > + /* Tell the block layer that this is not a rotational device */ > + blk_queue_flag_set(QUEUE_FLAG_NONROT, disk->queue); > + blk_queue_flag_clear(QUEUE_FLAG_ADD_RANDOM, disk->queue); > + > return brd; > out_free_queue: > -- > 2.13.0
