Currently driver sets default queue_depth for VDs at 256 and JBODs based on
interface type,
ie., for SAS JBOD QD will be 64, for SATA JBOD QD will be 32.
During performance runs with scsi-mq enabled, we are seeing better results by
setting QD same as HBA queue_depth.
Signed-off-by: Kashyap Desai <kashyap.de...@broadcom.com>
Signed-off-by: Shivasharan S <shivasharan.srikanteshw...@broadcom.com>
---
drivers/scsi/megaraid/megaraid_sas_base.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/scsi/megaraid/megaraid_sas_base.c
b/drivers/scsi/megaraid/megaraid_sas_base.c
index 0230929..c200f1a 100644
--- a/drivers/scsi/megaraid/megaraid_sas_base.c
+++ b/drivers/scsi/megaraid/megaraid_sas_base.c
@@ -1891,7 +1891,8 @@ static void megasas_set_static_target_properties(struct
scsi_device *sdev,
if (instance->nvme_page_size && max_io_size_kb)
megasas_set_nvme_device_properties(sdev, (max_io_size_kb <<
10));
- scsi_change_queue_depth(sdev, device_qd);
+ if (!shost_use_blk_mq(sdev->host))
+ scsi_change_queue_depth(sdev, device_qd);
}
@@ -5914,6 +5915,9 @@ static int megasas_io_attach(struct megasas_instance
*instance)
host->max_lun = MEGASAS_MAX_LUN;
host->max_cmd_len = 16;
+ if (shost_use_blk_mq(host))
+ host->cmd_per_lun = host->can_queue;
+
/*
* Notify the mid-layer about the new controller
*/
--
2.8.3
