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scsi: lpfc: Added recovery logic for running out of NVMET IO context resources

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Previous logic would just drop the IO.

Added logic to queue the IO to wait for an IO context resource from an
IO thats already in progress.

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>
This commit is contained in:
James Smart
2017-05-15 15:20:46 -07:00
committed by Martin K. Petersen
parent 6c621a2229
commit a8cf5dfeb4
8 changed files with 144 additions and 24 deletions
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6
drivers/scsi/lpfc/lpfc_debugfs.c
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@@ -842,6 +842,12 @@ lpfc_debugfs_nvmestat_data(struct lpfc_vport *vport, char *buf, int size)
}
spin_unlock(&phba->sli4_hba.abts_nvme_buf_list_lock);
}
len += snprintf(buf + len, size - len,
"IO_CTX: %08x outstanding %08x total %08x\n",
phba->sli4_hba.nvmet_ctx_cnt,
phba->sli4_hba.nvmet_io_wait_cnt,
phba->sli4_hba.nvmet_io_wait_total);
} else {
if (!(phba->cfg_enable_fc4_type & LPFC_ENABLE_NVME))
return len;