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[SCSI] lpfc 8.2.8 v2 : Add sysfs control of target queue depth handling

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Added new sysfs attribute lpfc_max_scsicmpl_time. Attribute, when enabled,
will control target queue depth based on I/O completion time.

Signed-off-by: James Smart <james.smart@emulex.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
This commit is contained in:
James Smart
2008-09-07 11:52:04 -04:00
committed by James Bottomley
parent b522d7d42d
commit 977b5a0af6
6 changed files with 85 additions and 0 deletions
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6
drivers/scsi/lpfc/lpfc.h
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@@ -34,6 +34,11 @@ struct lpfc_sli2_slim;
#define LPFC_IOCB_LIST_CNT 2250 /* list of IOCBs for fast-path usage. */
#define LPFC_Q_RAMP_UP_INTERVAL 120 /* lun q_depth ramp up interval */
#define LPFC_VNAME_LEN 100 /* vport symbolic name length */
#define LPFC_TGTQ_INTERVAL 40000 /* Min amount of time between tgt
queue depth change in millisecs */
#define LPFC_TGTQ_RAMPUP_PCENT 5 /* Target queue rampup in percentage */
#define LPFC_MIN_TGT_QDEPTH 100
#define LPFC_MAX_TGT_QDEPTH 0xFFFF
/*
* Following time intervals are used of adjusting SCSI device
@@ -363,6 +368,7 @@ struct lpfc_vport {
uint32_t cfg_log_verbose;
uint32_t cfg_max_luns;
uint32_t cfg_enable_da_id;
uint32_t cfg_max_scsicmpl_time;
uint32_t dev_loss_tmo_changed;