RE: [PATCH 1/1] scsi: storvsc: Increase cmd_per_lun for higher speed devices

[KY Srinivasan]

> -----Original Message-----
> From: Michael Kelley (EOSG)
> Sent: Wednesday, January 24, 2018 2:50 PM
> To: KY Srinivasan <kys@xxxxxxxxxxxxx>; Stephen Hemminger
> <sthemmin@xxxxxxxxxxxxx>; martin.petersen@xxxxxxxxxx; Long Li
> <longli@xxxxxxxxxxxxx>; jejb@xxxxxxxxxxxxxxxxxx;
> devel@xxxxxxxxxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx; linux-
> scsi@xxxxxxxxxxxxxxx
> Cc: Michael Kelley (EOSG) <Michael.H.Kelley@xxxxxxxxxxxxx>
> Subject: [PATCH 1/1] scsi: storvsc: Increase cmd_per_lun for higher speed
> devices
> 
> Increase cmd_per_lun to allow more I/Os in progress per device,
> particularly for NVMe's.  The Hyper-V host side can handle the
> higher count with no issues.
> 
> Signed-off-by: Michael Kelley <mikelley@xxxxxxxxxxxxx>

Reviewed-by: K. Y. Srinivasan <kys@xxxxxxxxxxxxx>
Acked-by: K. Y. Srinivasan <kys@xxxxxxxxxxxxx>

Thanks,

K. Y
> ---
>  drivers/scsi/storvsc_drv.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/scsi/storvsc_drv.c b/drivers/scsi/storvsc_drv.c
> index f3264c4..6205107 100644
> --- a/drivers/scsi/storvsc_drv.c
> +++ b/drivers/scsi/storvsc_drv.c
> @@ -1657,7 +1657,7 @@ static int storvsc_queuecommand(struct Scsi_Host
> *host, struct scsi_cmnd *scmnd)
>  	.eh_timed_out =		storvsc_eh_timed_out,
>  	.slave_alloc =		storvsc_device_alloc,
>  	.slave_configure =	storvsc_device_configure,
> -	.cmd_per_lun =		255,
> +	.cmd_per_lun =		2048,
>  	.this_id =		-1,
>  	.use_clustering =	ENABLE_CLUSTERING,
>  	/* Make sure we dont get a sg segment crosses a page boundary */
> --
> 1.8.3.1