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virtio_blk: set queue paravirt flag

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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 <fernando@oss.ntt.co.jp>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
This commit is contained in:
Fernando Luis Vázquez Cao 2008-10-27 18:45:15 +09:00 committed by Jens Axboe
parent 88e740f165
commit 7d116b626b
1 changed files with 2 additions and 0 deletions
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2
drivers/block/virtio_blk.c
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@ -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) {