From 96b6ce4e8b66b009396799843d6191fefcc36c33 Mon Sep 17 00:00:00 2001 From: Don Brace Date: Mon, 30 Jan 2017 16:05:17 -0600 Subject: [PATCH] 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: Don Brace Reviewed-by: Scott Benesh Reviewed-by: Scott Teel Reviewed-by: Kevin Barnett Reviewed-by: Hannes Reinecke Signed-off-by: Martin K. Petersen --- drivers/scsi/hpsa.c | 8 ++------ 1 file changed, 2 insertions(+), 6 deletions(-) diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c index cbc0c5fe5a60..4323ddcf9718 100644 --- a/drivers/scsi/hpsa.c +++ b/drivers/scsi/hpsa.c @@ -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, -- 2.20.1