From: Bodo Stroesser <bstroesser@xxxxxxxxxxxxxx>
Hi James,
We had some performance problems with RAID systems connected to LPe12k.
AFAICS, the reason is a small bug in lpfc.ko, causing the IO-size to
be smaller than expected.
The patch below fixes it for us.
Please CC me, I'm not on the list.
Best regards
Bodo
------------------------------------------------------
Currently the module parameter lpfc_sg_seg_count does not have effect
for sli3 devices.
In lpfc_sli_driver_resource_setup(), which is used for sli3, the code
writes the configured sg_seg_cnt into lpfc_template.sg_tablesize.
But lpfc_template is the template used for sli4 only. Thus the value should
correctly be written to lpfc_template_s3->sg_tablesize.
This patch is for kernel 4.1-rc5, but is tested with lpfc 10.2.405.26 only.
Signed-off-by: Bodo Stroesser <bstroesser@xxxxxxxxxxxxxx>
Signed-off-by: James Smart <james.smart@xxxxxxxxxxxxx>
---
drivers/scsi/lpfc/lpfc_init.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/scsi/lpfc/lpfc_init.c b/drivers/scsi/lpfc/lpfc_init.c
index da9b6fc..81bfb2d 100644
--- a/drivers/scsi/lpfc/lpfc_init.c
+++ b/drivers/scsi/lpfc/lpfc_init.c
@@ -4994,7 +4994,7 @@ lpfc_sli_driver_resource_setup(struct lpfc_hba *phba)
/* Initialize the host templates the configured values. */
lpfc_vport_template.sg_tablesize = phba->cfg_sg_seg_cnt;
- lpfc_template.sg_tablesize = phba->cfg_sg_seg_cnt;
+ lpfc_template_s3.sg_tablesize = phba->cfg_sg_seg_cnt;
/* There are going to be 2 reserved BDEs: 1 FCP cmnd + 1 FCP rsp */
if (phba->cfg_enable_bg) {
--
1.7.11.7
--
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