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scsi: lpfc: Change default SCSI LUN QD to 64

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The default lun queue depth by the driver has been 30 for many years.
However, this value, when used with more recent hardware, has actually
throttled some tests that concentrate io on a lun.

Increase the default lun queue depth to 64.

Queue full handling, reported by the target, remains in effect and
unchanged.

Link: https://lore.kernel.org/r/20200323161935.40341-1-jsmart2021@gmail.com
Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Dick Kennedy 2020-03-23 09:19:35 -07:00 • committed by Martin K. Petersen
parent c6e085c881
commit 763a18cbf7
1 changed files with 2 additions and 2 deletions
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4
drivers/scsi/lpfc/lpfc_attr.c
View file

@ -3805,9 +3805,9 @@ LPFC_VPORT_ATTR_R(enable_da_id, 1, 0, 1,
/*
# lun_queue_depth: This parameter is used to limit the number of outstanding
# commands per FCP LUN. Value range is [1,512]. Default value is 30.
# commands per FCP LUN.
*/
LPFC_VPORT_ATTR_R(lun_queue_depth, 30, 1, 512,
LPFC_VPORT_ATTR_R(lun_queue_depth, 64, 1, 512,
"Max number of FCP commands we can queue to a specific LUN");
/*