linux-kernel - Re: [PATCH 20/22] atari_scsi: Set a reasonable default for cmd_per

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Date:	Mon, 14 Mar 2016 08:49:09 +0100
From:	Hannes Reinecke <hare@...e.de>
To:	Finn Thain <fthain@...egraphics.com.au>,
	"James E.J. Bottomley" <James.Bottomley@...senPartnership.com>,
	"Martin K. Petersen" <martin.petersen@...cle.com>,
	Michael Schmitz <schmitzmic@...il.com>,
	linux-m68k@...r.kernel.org, linux-scsi@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc:	Ondrej Zary <linux@...nbow-software.org>,
	Sam Creasey <sammy@...my.net>
Subject: Re: [PATCH 20/22] atari_scsi: Set a reasonable default for
 cmd_per_lun

On 03/14/2016 05:27 AM, Finn Thain wrote:
> This setting does not need to be conditional on Atari ST or TT.
> 
> Without TCQ support, cmd_per_lun == 2 is probably reasonable...
> 
> Signed-off-by: Finn Thain <fthain@...egraphics.com.au>
> 
> ---
>  drivers/scsi/atari_scsi.c |    3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> Index: linux/drivers/scsi/atari_scsi.c
> ===================================================================
> --- linux.orig/drivers/scsi/atari_scsi.c	2016-03-14 15:26:45.000000000 +1100
> +++ linux/drivers/scsi/atari_scsi.c	2016-03-14 15:26:55.000000000 +1100
> @@ -750,6 +750,7 @@ static struct scsi_host_template atari_s
>  	.eh_abort_handler	= atari_scsi_abort,
>  	.eh_bus_reset_handler	= atari_scsi_bus_reset,
>  	.this_id		= 7,
> +	.cmd_per_lun		= 2,
>  	.use_clustering		= DISABLE_CLUSTERING,
>  	.cmd_size		= NCR5380_CMD_SIZE,
>  };
_2_ ? Are you being overly cheeky here?
I sincerely doubt the driver is capable of submitting two
simultaneous commands ...
Care to explain?

Cheers,

Hannes
-- 
Dr. Hannes Reinecke		   Teamlead Storage & Networking
hare@...e.de			               +49 911 74053 688
SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg
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