From 7d116b626b843c66b17630a62d696e044d049bfc Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Fernando=20Luis=20V=C3=A1zquez=20Cao?= Date: Mon, 27 Oct 2008 18:45:15 +0900 Subject: [PATCH] virtio_blk: set queue paravirt flag As a paravirt front-end driver, virtio_blk is not a rotational device so we want do avoid idling in AS/CFQ. Tell the block layer about this. Signed-off-by: Fernando Luis Vazquez Cao Signed-off-by: Jens Axboe --- drivers/block/virtio_blk.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c index 85d79a02d487..f151592ecf73 100644 --- a/drivers/block/virtio_blk.c +++ b/drivers/block/virtio_blk.c @@ -237,6 +237,8 @@ static int virtblk_probe(struct virtio_device *vdev) goto out_put_disk; } + queue_flag_set_unlocked(QUEUE_FLAG_VIRT, vblk->disk->queue); + if (index < 26) { sprintf(vblk->disk->disk_name, "vd%c", 'a' + index % 26); } else if (index < (26 + 1) * 26) {