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Commit 96b6ce4e authored by Don Brace's avatar Don Brace Committed by Martin K. Petersen
Browse files

scsi: hpsa: remove coalescing settings for ioaccel2 



- Setting coalescing has a significant negative impact on low
  queue-depth performance.
- Does not help high queue-depth performance.

Signed-off-by: default avatarDon Brace <don.brace@microsemi.com>
Reviewed-by: default avatarScott Benesh <scott.benesh@microsemi.com>
Reviewed-by: default avatarScott Teel <scott.teel@microsemi.com>
Reviewed-by: default avatarKevin Barnett <kevin.barnett@microsemi.com>
Reviewed-by: default avatarHannes Reinecke <hare@suse.com>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
parent 526db94e

drivers/scsi/hpsa.c

+2 −6
Original line number Diff line number Diff line
@@ -9263,13 +9263,9 @@ static int hpsa_enter_performant_mode(struct ctlr_info *h, u32 trans_support) 
		access = SA5_ioaccel_mode1_access;

		writel(10, &h->cfgtable->HostWrite.CoalIntDelay);

		writel(4, &h->cfgtable->HostWrite.CoalIntCount);

	} else {

		if (trans_support & CFGTBL_Trans_io_accel2) {

	} else

		if (trans_support & CFGTBL_Trans_io_accel2)

			access = SA5_ioaccel_mode2_access;

			writel(10, &h->cfgtable->HostWrite.CoalIntDelay);

			writel(4, &h->cfgtable->HostWrite.CoalIntCount);

		}

	}

	writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL);

	if (hpsa_wait_for_mode_change_ack(h)) {

		dev_err(&h->pdev->dev,