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


> -----Original Message-----
> From: Michael Kelley (EOSG)
> Sent: Wednesday, January 24, 2018 2:50 PM
> To: KY Srinivasan <kys@microsoft.com>; Stephen Hemminger
> <sthemmin@microsoft.com>; martin.petersen@oracle.com; Long Li
> <longli@microsoft.com>; jejb@linux.vnet.ibm.com;
> devel@linuxdriverproject.org; linux-kernel@vger.kernel.org; linux-
> scsi@vger.kernel.org
> Cc: Michael Kelley (EOSG) <Michael.H.Kelley@microsoft.com>
> 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@microsoft.com>

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

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

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