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scsi: lpfc: Zero CGN stats only during initial driver load and stat reset

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Currently congestion management framework results are cleared whenever the
framework settings changed (such as it being turned off then back on). This
unfortunately means prior stats, rolled up to higher time windows lose
meaning.

Change such that stats are not cleared. Thus they pause and resume with
prior values still being considered.

Link: https://lore.kernel.org/r/20210910233159.115896-13-jsmart2021@gmail.com
Co-developed-by: Justin Tee <justin.tee@broadcom.com>
Signed-off-by: Justin Tee <justin.tee@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
James Smart 2021-09-10 16:31:57 -07:00 committed by Martin K. Petersen
parent 3ea998cbf9
commit afd63fa511
2 changed files with 4 additions and 4 deletions
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2
drivers/scsi/lpfc/lpfc_init.c
View File

@ -13394,8 +13394,6 @@ lpfc_init_congestion_buf(struct lpfc_hba *phba)
atomic_set(&phba->cgn_sync_alarm_cnt, 0);
atomic_set(&phba->cgn_sync_warn_cnt, 0);
atomic64_set(&phba->cgn_acqe_stat.alarm, 0);
atomic64_set(&phba->cgn_acqe_stat.warn, 0);
atomic_set(&phba->cgn_driver_evt_cnt, 0);
atomic_set(&phba->cgn_latency_evt_cnt, 0);
atomic64_set(&phba->cgn_latency_evt, 0);

6
drivers/scsi/lpfc/lpfc_sli.c
View File

@ -7764,8 +7764,6 @@ lpfc_mbx_cmpl_cgn_set_ftrs(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
/* Zero out Congestion Signal ACQE counter */
phba->cgn_acqe_cnt = 0;
atomic64_set(&phba->cgn_acqe_stat.warn, 0);
atomic64_set(&phba->cgn_acqe_stat.alarm, 0);
acqe = bf_get(lpfc_mbx_set_feature_CGN_acqe_freq,
&pmb->u.mqe.un.set_feature);
@ -8017,6 +8015,10 @@ lpfc_cmf_setup(struct lpfc_hba *phba)
/* initialize congestion buffer info */
lpfc_init_congestion_buf(phba);
lpfc_init_congestion_stat(phba);
/* Zero out Congestion Signal counters */
atomic64_set(&phba->cgn_acqe_stat.alarm, 0);
atomic64_set(&phba->cgn_acqe_stat.warn, 0);
}
rc = lpfc_sli4_cgn_params_read(phba);