diff options
| author | James Smart <jsmart2021@gmail.com> | 2017-11-20 16:00:29 -0800 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2017-12-04 20:32:53 -0500 |
| commit | 81b96eda5ff8077873072facd20b9d85a80c61bd (patch) | |
| tree | 3e08e45371e2cc28910eb6693d422f7c381a119e /drivers/scsi/lpfc/lpfc_nvme.h | |
| parent | c73455e1b5ef165aed82e36ae04e74a71d2d7d5b (diff) | |
scsi: lpfc: Expand WQE capability of every NVME hardware queue
Hardware queues are a fast staging area to push commands into the
adapter. The adapter should drain them extremely quickly. However,
under heavy io load, the host cpu is pushing commands faster than the
drain rate of the adapter causing the driver to resource busy commands.
Enlarge the hardware queue (wq & cq) to support a larger number of queue
entries (4x the prior size) before backpressure. Enlarging the queue
requires larger contiguous buffers (16k) per logical page for the
hardware. This changed calling sequences that were expecting 4K page
sizes that now must pass a parameter with the page sizes. It also
required use of a new version of an adapter command that can vary the
page size values.
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.h')
| -rw-r--r-- | drivers/scsi/lpfc/lpfc_nvme.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/scsi/lpfc/lpfc_nvme.h b/drivers/scsi/lpfc/lpfc_nvme.h index d192bb268f99..fbfc1786cd04 100644 --- a/drivers/scsi/lpfc/lpfc_nvme.h +++ b/drivers/scsi/lpfc/lpfc_nvme.h @@ -22,7 +22,8 @@ ********************************************************************/ #define LPFC_NVME_DEFAULT_SEGS (64 + 1) /* 256K IOs */ -#define LPFC_NVME_WQSIZE 256 +#define LPFC_NVME_WQSIZE 1024 +#define LPFC_NVME_CQSIZE 4096 #define LPFC_NVME_ERSP_LEN 0x20 |