diff options
| author | James Smart <james.smart@emulex.com> | 2010-07-14 15:32:10 -0400 |
|---|---|---|
| committer | James Bottomley <James.Bottomley@suse.de> | 2010-07-28 09:05:41 -0500 |
| commit | 7dc517df3ace15b5a29b331abe0af86ed4836236 (patch) | |
| tree | 7f95a4b9833b1549078244c28d4ddcde56d847ed /drivers/scsi/lpfc/lpfc_scsi.c | |
| parent | 3804dc84b8c11038ef75d97fd11e43658f623665 (diff) | |
[SCSI] lpfc 8.3.15: Add target queue depth throttling
Signed-off-by: Alex Iannicelli <alex.iannicelli@emulex.com>
Signed-off-by: James Smart <james.smart@emulex.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Diffstat (limited to 'drivers/scsi/lpfc/lpfc_scsi.c')
| -rw-r--r-- | drivers/scsi/lpfc/lpfc_scsi.c | 15 |
1 files changed, 8 insertions, 7 deletions
diff --git a/drivers/scsi/lpfc/lpfc_scsi.c b/drivers/scsi/lpfc/lpfc_scsi.c index d6089c985c3..c818a725596 100644 --- a/drivers/scsi/lpfc/lpfc_scsi.c +++ b/drivers/scsi/lpfc/lpfc_scsi.c @@ -2458,14 +2458,16 @@ lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn, } spin_unlock_irqrestore(shost->host_lock, flags); } else if (pnode && NLP_CHK_NODE_ACT(pnode)) { - if ((pnode->cmd_qdepth < LPFC_MAX_TGT_QDEPTH) && + if ((pnode->cmd_qdepth < vport->cfg_tgt_queue_depth) && time_after(jiffies, pnode->last_change_time + msecs_to_jiffies(LPFC_TGTQ_INTERVAL))) { spin_lock_irqsave(shost->host_lock, flags); - pnode->cmd_qdepth += pnode->cmd_qdepth * - LPFC_TGTQ_RAMPUP_PCENT / 100; - if (pnode->cmd_qdepth > LPFC_MAX_TGT_QDEPTH) - pnode->cmd_qdepth = LPFC_MAX_TGT_QDEPTH; + depth = pnode->cmd_qdepth * LPFC_TGTQ_RAMPUP_PCENT + / 100; + depth = depth ? depth : 1; + pnode->cmd_qdepth += depth; + if (pnode->cmd_qdepth > vport->cfg_tgt_queue_depth) + pnode->cmd_qdepth = vport->cfg_tgt_queue_depth; pnode->last_change_time = jiffies; spin_unlock_irqrestore(shost->host_lock, flags); } @@ -2920,8 +2922,7 @@ lpfc_queuecommand(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *)) cmnd->result = ScsiResult(DID_TRANSPORT_DISRUPTED, 0); goto out_fail_command; } - if (vport->cfg_max_scsicmpl_time && - (atomic_read(&ndlp->cmd_pending) >= ndlp->cmd_qdepth)) + if (atomic_read(&ndlp->cmd_pending) >= ndlp->cmd_qdepth) goto out_host_busy; lpfc_cmd = lpfc_get_scsi_buf(phba); |