linux-kernel - Re: [PATCH 3/8] scsi: megaraid_sas - add module param max_sectors, cmd_per

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Date:	Tue, 30 Oct 2007 17:38:58 +0000
From:	Christoph Hellwig <hch@...radead.org>
To:	bo yang <bo.yang@....com>
Cc:	linux-scsi@...r.kernel.org, James.Bottomley@...elEye.com,
	akpm@...l.org, linux-kernel@...r.kernel.org, Sumant.patro@....com
Subject: Re: [PATCH 3/8] scsi: megaraid_sas - add module param max_sectors, cmd_per_lun

On Mon, Oct 01, 2007 at 11:51:48AM -0400, bo yang wrote:
> +/*
> + * Number of sectors per IO command will be set in megasas_init_mfi
> + * if user does not provide
> + */
> +static unsigned int max_sectors;
> +module_param_named(max_sectors, max_sectors, int, 0);
> +MODULE_PARM_DESC(max_sectors,
> +	"Maximum number of sectors per IO command");
> +
> +/*
> + * Number of cmds per logical unit
> + */
> +static unsigned int cmd_per_lun = MEGASAS_DEFAULT_CMD_PER_LUN;
> +module_param_named(cmd_per_lun, cmd_per_lun, int, 0);
> +MODULE_PARM_DESC(cmd_per_lun,
> +	"Maximum number of commands per logical unit (default=128)");

I don't think this should be in drivers.  cmd_per_lun is a scsi_host
attribute already and you should change the mid-layer to add an
optional host template method that allows the sysfs file to be writeable.
max_sectors should be handled similar although we don't seem to have
an attribute for it yet (maybe the block layer does?)

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