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Revert "scsi: megaraid_sas: Enable or Disable Fast path based on the PCI Threshold Bandwidth"

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This reverts commit "3e5eadb1a881" ("scsi: megaraid_sas: Enable or
Disable Fast path based on the PCI Threshold Bandwidth")

This patch was aimed to increase performance of R1 Write operation for
large IO size.  Since this method used timer approach, it turn on/off
fast path did not work as expected.  Patch 0013 describes new algorithm
and performance number.

Signed-off-by: Shivasharan S <shivasharan.srikanteshwara@broadcom.com>
Signed-off-by: Kashyap Desai <kashyap.desai@broadcom.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Tomas Henzl <thenzl@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Shivasharan S
2017-02-10 00:59:01 -08:00
committed by Martin K. Petersen
parent 8b9b22ba75
commit 18bbcabdc6
5 changed files with 7 additions and 74 deletions
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drivers/scsi/megaraid/megaraid_sas_fusion.h
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@@ -977,7 +977,7 @@ struct MR_FW_RAID_MAP_DYNAMIC {
u32 desc_table_size; /* Total Size of desc table */
/* Total Number of elements in the desc table */
u32 desc_table_num_elements;
u64 pci_threshold_bandwidth;
u64 reserved1;
u32 reserved2[3]; /*future use */
/* timeout value used by driver in FP IOs */
u8 fp_pd_io_timeout_sec;