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| author | James Smart <jsmart2021@gmail.com> | 2019-01-28 20:14:29 +0100 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2019-02-06 04:29:09 +0100 |
| commit | 45aa312e211f1c8c44a8e90c184a21bbb5b5572c (patch) | |
| tree | b205f600bf511b4ba1851bf7386085b9be0006ab /drivers/scsi/lpfc/lpfc_hw4.h | |
| parent | scsi: lpfc: Adapt partitioned XRI lists to efficient sharing (diff) | |
| download | linux-45aa312e211f1c8c44a8e90c184a21bbb5b5572c.tar.xz linux-45aa312e211f1c8c44a8e90c184a21bbb5b5572c.zip | |
scsi: lpfc: Allow override of hardware queue selection policies
Default behavior is to use the information from the upper IO stacks to
select the hardware queue to use for IO submission. Which typically has
good cpu affinity.
However, the driver, when used on some variants of the upstream kernel, has
found queuing information to be suboptimal for FCP or IO completion locked
on particular cpus.
For command submission situations, the lpfc_fcp_io_sched module parameter
can be set to specify a hardware queue selection policy that overrides the
os stack information.
For IO completion situations, rather than queing cq processing based on the
cpu servicing the interrupting event, schedule the cq processing on the cpu
associated with the hardware queue's cq.
Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/lpfc/lpfc_hw4.h')
| -rw-r--r-- | drivers/scsi/lpfc/lpfc_hw4.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/scsi/lpfc/lpfc_hw4.h b/drivers/scsi/lpfc/lpfc_hw4.h index c15b9b6fb840..cd39845c909f 100644 --- a/drivers/scsi/lpfc/lpfc_hw4.h +++ b/drivers/scsi/lpfc/lpfc_hw4.h @@ -194,7 +194,7 @@ struct lpfc_sli_intf { #define LPFC_ACT_INTR_CNT 4 /* Algrithmns for scheduling FCP commands to WQs */ -#define LPFC_FCP_SCHED_ROUND_ROBIN 0 +#define LPFC_FCP_SCHED_BY_HDWQ 0 #define LPFC_FCP_SCHED_BY_CPU 1 /* Algrithmns for NameServer Query after RSCN */ |