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ea85a20cd5
linux/drivers/scsi/lpfc
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James Smart ea85a20cd5 scsi: lpfc: Remove lock contention target write path 
Lower IOps performance with write operations. Perf tool shows lock
contention in dma_pool_alloc and dma_pool_free related to the
txrdy_payload_pool.

The allocations are for dma buffers for XFER_RDY's, which actually are not
needed for the FCP_TRECEIVE command as the command contents are used by the
adapter to generate the IU.

Remove the allocations and the associated buffer pool.  Rather than leaving
NULLs in buffer pointer locations, set command and sgl to indicate skipped
SGLE indexes.

Link: https://lore.kernel.org/r/20191018211832.7917-10-jsmart2021@gmail.com
Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-10-24 21:02:05 -04:00
..
lpfc_attr.c scsi: lpfc: fix lpfc_nvmet_mrq to be bound by hdw queue count 2019-10-24 21:02:04 -04:00
lpfc_attr.h scsi: lpfc: Revise copyright for new company language 2018-07-10 22:15:09 -04:00
lpfc_bsg.c scsi: lpfc: Migrate to %px and %pf in kernel print calls 2019-08-19 22:41:11 -04:00
lpfc_bsg.h scsi: lpfc: Update Copyright in driver version 2019-03-19 13:15:10 -04:00
lpfc_compat.h scsi: lpfc: Revise copyright for new company language 2018-07-10 22:15:09 -04:00
lpfc_crtn.h scsi: lpfc: Fix NVMe ABTS in response to receiving an ABTS 2019-09-30 22:07:10 -04:00
lpfc_ct.c scsi: lpfc: Fix list corruption in lpfc_sli_get_iocbq 2019-09-30 22:07:10 -04:00
lpfc_debugfs.c scsi: lpfc: Remove bg debugfs buffers 2019-08-29 18:08:58 -04:00
lpfc_debugfs.h scsi: lpfc: Merge per-protocol WQ/CQ pairs into single per-cpu pair 2019-08-19 22:41:12 -04:00
lpfc_disc.h scsi: lpfc: Add NVMe sequence level error recovery support 2019-08-19 22:41:12 -04:00
lpfc_els.c scsi: lpfc: fix coverity error of dereference after null check 2019-10-24 21:02:05 -04:00
lpfc_hbadisc.c scsi: lpfc: Fix list corruption in lpfc_sli_get_iocbq 2019-09-30 22:07:10 -04:00
lpfc_hw4.h scsi: lpfc: Fix reporting of read-only fw error errors 2019-10-24 21:02:04 -04:00
lpfc_hw.h scsi: lpfc: Fix ELS field alignments 2019-08-19 22:41:08 -04:00
lpfc_ids.h scsi: lpfc: Revise copyright for new company language 2018-07-10 22:15:09 -04:00
lpfc_init.c scsi: lpfc: Remove lock contention target write path 2019-10-24 21:02:05 -04:00
lpfc_logmsg.h scsi: lpfc: Revise copyright for new company language 2018-07-10 22:15:09 -04:00
lpfc_mbox.c SCSI misc on 20190306 2019-03-09 16:53:47 -08:00
lpfc_mem.c scsi: lpfc: Remove lock contention target write path 2019-10-24 21:02:05 -04:00
lpfc_nl.h scsi: lpfc: Revise copyright for new company language 2018-07-10 22:15:09 -04:00
lpfc_nportdisc.c scsi: lpfc: Fix SLI3 hba in loop mode not discovering devices 2019-10-24 21:02:04 -04:00
lpfc_nvme.c scsi: lpfc: Slight fast-path performance optimizations 2019-10-24 21:02:05 -04:00
lpfc_nvme.h SCSI misc on 20190306 2019-03-09 16:53:47 -08:00
lpfc_nvmet.c scsi: lpfc: Remove lock contention target write path 2019-10-24 21:02:05 -04:00
lpfc_nvmet.h scsi: lpfc: Remove lock contention target write path 2019-10-24 21:02:05 -04:00
lpfc_scsi.c scsi: lpfc: Slight fast-path performance optimizations 2019-10-24 21:02:05 -04:00
lpfc_scsi.h scsi: lpfc: Update 12.2.0.0 file copyrights to 2019 2019-02-05 22:29:50 -05:00
lpfc_sli4.h SCSI misc on 20190919 2019-09-21 10:50:15 -07:00
lpfc_sli.c scsi: lpfc: Fix bad ndlp ptr in xri aborted handling 2019-10-24 21:02:04 -04:00
lpfc_sli.h scsi: lpfc: Fix bad ndlp ptr in xri aborted handling 2019-10-24 21:02:04 -04:00
lpfc_version.h scsi: lpfc: Update lpfc version to 12.4.0.1 2019-09-30 22:07:11 -04:00
lpfc_vport.c scsi: lpfc: Fix issuing init_vpi mbox on SLI-3 card 2019-08-19 22:41:09 -04:00
lpfc_vport.h scsi: lpfc: Revise copyright for new company language 2018-07-10 22:15:09 -04:00
lpfc.h scsi: lpfc: Remove lock contention target write path 2019-10-24 21:02:05 -04:00
Makefile scsi: lpfc: Revise copyright for new company language 2018-07-10 22:15:09 -04:00