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scsi: lpfc: Log when congestion management limits are in effect

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When bandwidth reduces from or recovers back to 100% due to congestion
management, log the event.

Signed-off-by: Justin Tee <justin.tee@broadcom.com>
Link: https://lore.kernel.org/r/20221017164323.14536-3-justintee8345@gmail.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Justin Tee 2022-10-17 09:43:21 -07:00 committed by Martin K. Petersen
parent c44e50f4a0
commit eaf660e428
1 changed files with 12 additions and 0 deletions
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12
drivers/scsi/lpfc/lpfc_sli.c
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@ -1848,6 +1848,18 @@ lpfc_cmf_sync_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
phba->cmf_link_byte_count);
bwpcent = div64_u64(bw * 100 + slop,
phba->cmf_link_byte_count);
if (phba->cmf_max_bytes_per_interval < bw &&
bwpcent > 95)
lpfc_printf_log(phba, KERN_INFO, LOG_CGN_MGMT,
"6208 Congestion bandwidth "
"limits removed\n");
else if ((phba->cmf_max_bytes_per_interval > bw) &&
((bwpcent + pcent) <= 100) && ((bwpcent + pcent) > 95))
lpfc_printf_log(phba, KERN_INFO, LOG_CGN_MGMT,
"6209 Congestion bandwidth "
"limits in effect\n");
if (asig) {
lpfc_printf_log(phba, KERN_INFO, LOG_CGN_MGMT,
"6237 BW Threshold %lld%% (%lld): "