diff options
| author | James Smart <jsmart2021@gmail.com> | 2018-08-01 03:23:22 +0300 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2018-08-02 22:45:19 +0300 |
| commit | 2a5b7d626ed2256fd0ef0e799ebc6ef47b7bd283 (patch) | |
| tree | 63fb5737e68253ae59db6fa2d5a46fab21b90b02 /drivers/scsi/lpfc/lpfc_nportdisc.c | |
| parent | 93a3922da428ec0752e8b2ab00c42dadbbf805a9 (diff) | |
| download | linux-2a5b7d626ed2256fd0ef0e799ebc6ef47b7bd283.tar.xz | |
scsi: lpfc: Limit tracking of tgt queue depth in fast path
Performance is affected when target queue depth is tracked. An atomic
counter is incremented on the submission path which competes with it being
decremented on the completion path. In addition, multiple CPUs can
simultaniously be manipulating this counter for the same ndlp.
Reduce the overhead by only performing the target increment/decrement when
the target queue depth is less than the overall adapter depth, thus is
actually meaningful.
Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/lpfc/lpfc_nportdisc.c')
| -rw-r--r-- | drivers/scsi/lpfc/lpfc_nportdisc.c | 6 |
1 files changed, 0 insertions, 6 deletions
diff --git a/drivers/scsi/lpfc/lpfc_nportdisc.c b/drivers/scsi/lpfc/lpfc_nportdisc.c index 843e765db86d..bd9bce9d9974 100644 --- a/drivers/scsi/lpfc/lpfc_nportdisc.c +++ b/drivers/scsi/lpfc/lpfc_nportdisc.c @@ -1985,12 +1985,6 @@ lpfc_cmpl_prli_prli_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, if (bf_get_be32(prli_disc, nvpr)) ndlp->nlp_type |= NLP_NVME_DISCOVERY; - /* This node is an NVME target. Adjust the command - * queue depth on this node to not exceed the available - * xris. - */ - ndlp->cmd_qdepth = phba->sli4_hba.nvme_xri_max; - /* * If prli_fba is set, the Target supports FirstBurst. * If prli_fb_sz is 0, the FirstBurst size is unlimited, |