diff options
| author | Jamie Wellnitz <Jamie.Wellnitz@emulex.com> | 2006-02-28 19:25:21 -0500 |
|---|---|---|
| committer | James Bottomley <jejb@mulgrave.il.steeleye.com> | 2006-02-28 18:56:23 -0600 |
| commit | b28485acb930f67c014024bc3b9c01129124e566 (patch) | |
| tree | 1fcbc64296d1b592457f56474ce82f3870513627 | |
| parent | 406d6041ace581b63a7898f3c1ef036c58c74989 (diff) | |
| download | lwn-b28485acb930f67c014024bc3b9c01129124e566.tar.gz lwn-b28485acb930f67c014024bc3b9c01129124e566.zip | |
[SCSI] lpfc 8.1.2: Add module parameter to limit number of outstanding commands per lpfc HBA
Add module parameter to limit number of outstanding commands per lpfc HBA
Signed-off-by: Jamie Wellnitz <Jamie.Wellnitz@emulex.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
| -rw-r--r-- | drivers/scsi/lpfc/lpfc_attr.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/scsi/lpfc/lpfc_attr.c b/drivers/scsi/lpfc/lpfc_attr.c index 5625a8c2a8fd..b897e522a966 100644 --- a/drivers/scsi/lpfc/lpfc_attr.c +++ b/drivers/scsi/lpfc/lpfc_attr.c @@ -520,6 +520,16 @@ LPFC_ATTR_R(lun_queue_depth, 30, 1, 128, "Max number of FCP commands we can queue to a specific LUN"); /* +# hba_queue_depth: This parameter is used to limit the number of outstanding +# commands per lpfc HBA. Value range is [32,8192]. If this parameter +# value is greater than the maximum number of exchanges supported by the HBA, +# then maximum number of exchanges supported by the HBA is used to determine +# the hba_queue_depth. +*/ +LPFC_ATTR_R(hba_queue_depth, 8192, 32, 8192, + "Max number of FCP commands we can queue to a lpfc HBA"); + +/* # Some disk devices have a "select ID" or "select Target" capability. # From a protocol standpoint "select ID" usually means select the # Fibre channel "ALPA". In the FC-AL Profile there is an "informative @@ -649,6 +659,7 @@ struct class_device_attribute *lpfc_host_attrs[] = { &class_device_attr_lpfc_drvr_version, &class_device_attr_lpfc_log_verbose, &class_device_attr_lpfc_lun_queue_depth, + &class_device_attr_lpfc_hba_queue_depth, &class_device_attr_lpfc_nodev_tmo, &class_device_attr_lpfc_fcp_class, &class_device_attr_lpfc_use_adisc, @@ -1411,5 +1422,9 @@ lpfc_get_cfgparam(struct lpfc_hba *phba) default: phba->cfg_hba_queue_depth = LPFC_DFT_HBA_Q_DEPTH; } + + if (phba->cfg_hba_queue_depth > lpfc_hba_queue_depth) + lpfc_hba_queue_depth_init(phba, lpfc_hba_queue_depth); + return; } |