diff options
| author | James Smart <jsmart2021@gmail.com> | 2018-05-24 21:08:58 -0700 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2018-05-28 22:40:33 -0400 |
| commit | 4d5e789a2eb111d7f9e032d0ebaecb465a2eca8f (patch) | |
| tree | 2cd682f0d56a385908cca3285dd3021e1189344e /drivers/scsi/lpfc/lpfc_nvme.c | |
| parent | dc19e3b4a80e0bb1e5f080473fffa0ac8c0694a6 (diff) | |
scsi: lpfc: correct oversubscription of nvme io requests for an adapter
Under large configurations, the driver would start to log message 6065 -
NVME out of buffers (exchanges).
The driver is using the ndlp cmd_qdepth value when determining the max
outstanding ios for an adapter. This value, by default, is set to 65536,
which exceeds the maximum exchange counts supported on an adapter. The ndlp
cmd_qdepth has no relevance and outstanding io count should be capped at
the max exchange count with IO requests beyond that level getting bounced
back with an EBUSY status so that they are retried by the block layer.
Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <james.smart@broadcom.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/lpfc/lpfc_nvme.c')
| -rw-r--r-- | drivers/scsi/lpfc/lpfc_nvme.c | 23 |
1 files changed, 19 insertions, 4 deletions
diff --git a/drivers/scsi/lpfc/lpfc_nvme.c b/drivers/scsi/lpfc/lpfc_nvme.c index f5f90d19b215..288dd3caff8a 100644 --- a/drivers/scsi/lpfc/lpfc_nvme.c +++ b/drivers/scsi/lpfc/lpfc_nvme.c @@ -973,9 +973,22 @@ lpfc_nvme_io_cmd_wqe_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pwqeIn, /* Sanity check on return of outstanding command */ if (!lpfc_ncmd || !lpfc_ncmd->nvmeCmd || !lpfc_ncmd->nrport) { + if (!lpfc_ncmd) { + lpfc_printf_vlog(vport, KERN_ERR, + LOG_NODE | LOG_NVME_IOERR, + "6071 Null lpfc_ncmd pointer. No " + "release, skip completion\n"); + return; + } + lpfc_printf_vlog(vport, KERN_ERR, LOG_NODE | LOG_NVME_IOERR, - "6071 Completion pointers bad on wqe %p.\n", - wcqe); + "6066 Missing cmpl ptrs: lpfc_ncmd %p, " + "nvmeCmd %p nrport %p\n", + lpfc_ncmd, lpfc_ncmd->nvmeCmd, + lpfc_ncmd->nrport); + + /* Release the lpfc_ncmd regardless of the missing elements. */ + lpfc_release_nvme_buf(phba, lpfc_ncmd); return; } nCmd = lpfc_ncmd->nvmeCmd; @@ -1537,8 +1550,10 @@ lpfc_nvme_fcp_io_submit(struct nvme_fc_local_port *pnvme_lport, !expedite) { lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_IOERR, "6174 Fail IO, ndlp qdepth exceeded: " - "idx %d DID %x\n", - lpfc_queue_info->index, ndlp->nlp_DID); + "idx %d DID %x pend %d qdepth %d\n", + lpfc_queue_info->index, ndlp->nlp_DID, + atomic_read(&ndlp->cmd_pending), + ndlp->cmd_qdepth); atomic_inc(&lport->xmt_fcp_qdepth); ret = -EBUSY; goto out_fail; |