virtio-blk set the default queue depth to 64 requests, which was
insufficient for high-IOPS devices. Instead set the blk-queue depth to
the device's virtqueue depth divided by two (each I/O requires at least
two VQ entries).
Signed-off-by: Venkatesh Srinivas <venkateshs@xxxxxxxxxx>
---
drivers/block/virtio_blk.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c
index b1cb3f4..863ab02 100644
--- a/drivers/block/virtio_blk.c
+++ b/drivers/block/virtio_blk.c
@@ -485,7 +485,6 @@ static struct blk_mq_ops virtio_mq_ops = {
static struct blk_mq_reg virtio_mq_reg = {
.ops = &virtio_mq_ops,
.nr_hw_queues = 1,
- .queue_depth = 64,
.numa_node = NUMA_NO_NODE,
.flags = BLK_MQ_F_SHOULD_MERGE,
};
@@ -555,6 +554,7 @@ static int virtblk_probe(struct virtio_device *vdev)
virtio_mq_reg.cmd_size =
sizeof(struct virtblk_req) +
sizeof(struct scatterlist) * sg_elems;
+ virtio_mq_reg.queue_depth = vblk->vq->num_free / 2;
q = vblk->disk->queue = blk_mq_init_queue(&virtio_mq_reg, vblk);
if (!q) {
--
1.9.0.279.gdc9e3eb
_______________________________________________
Virtualization mailing list
Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx
https://lists.linuxfoundation.org/mailman/listinfo/virtualization
