Commit faf0a5f8 authored Sep 10, 2018 by James Smart Committed by Martin K. Petersen Sep 11, 2018

scsi: lpfc: Raise nvme defaults to support a larger io and more connectivity



When nvme is enabled, change the default for two parameters:
 sg_seg_cnt - raise the per-io sg list size so that 1MB ios are
     supported (based on a 4k buffer per element).
 iocb_cnt - raise the number of buffers used for things like
     NVME LS request/responses to allow more concurrent requests
     to for larger nvme configs.

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>

parent 5b9e70b2

drivers/scsi/lpfc/lpfc_attr.c

+10 −0

Original line number	Diff line number	Diff line
		@@ -6641,6 +6641,16 @@ lpfc_get_cfgparam(struct lpfc_hba *phba)
		lpfc_sli_mode_init(phba, lpfc_sli_mode);
		phba->cfg_enable_dss = 1;
		lpfc_enable_mds_diags_init(phba, lpfc_enable_mds_diags);

		/* If the NVME FC4 type is enabled, scale the sg_seg_cnt to
		* accommodate 512K and 1M IOs in a single nvme buf and supply
		* enough NVME LS iocb buffers for larger connectivity counts.
		*/
		if (phba->cfg_enable_fc4_type & LPFC_ENABLE_NVME) {
		phba->cfg_sg_seg_cnt = LPFC_MAX_NVME_SEG_CNT;
		phba->cfg_iocb_cnt = 5;
		}

		return;
		}

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