On 06/30/2017 10:30 AM, Shivasharan S wrote: > 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.desai@xxxxxxxxxxxx> > Signed-off-by: Shivasharan S <shivasharan.srikanteshwara@xxxxxxxxxxxx> > --- > 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 > */ > Is this bit really necessary? It will be adjusted by the above hunk, would it not? Cheers, Hannes -- Dr. Hannes Reinecke Teamlead Storage & Networking hare@xxxxxxx +49 911 74053 688 SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg GF: F. Imendörffer, J. Smithard, J. Guild, D. Upmanyu, G. Norton HRB 21284 (AG Nürnberg)
