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 <[email protected]> --- 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 [email protected] https://lists.linuxfoundation.org/mailman/listinfo/virtualization
