linux-kernel - RE: [PATCH 1/8] scsi: megaraid_sas

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Message-Id: <1193850744.3411.69.camel@localhost.localdomain>
Date:	Wed, 31 Oct 2007 12:12:24 -0500
From:	James Bottomley <James.Bottomley@...elEye.com>
To:	"Yang, Bo" <Bo.Yang@....com>
Cc:	linux-scsi@...r.kernel.org, akpm@...l.org,
	linux-kernel@...r.kernel.org,
	"Patro, Sumant" <Sumant.Patro@....com>,
	"Kolli, Neela" <Neela.Kolli@....com>
Subject: RE: [PATCH 1/8] scsi: megaraid_sas - add hibernation support

On Wed, 2007-10-31 at 07:25 -0600, Yang, Bo wrote:
> James,
> I did respond to Randy earlier. 

Sorry, I couldn't find it in the archive when I looked ... although the
scsi reflector seems to be missing quite a few of your emails for some
reason.

> About the module params being added : 
> 
> The fast_load parameter is for the user to decide at driver load time
> if (s)he wants to skip scan of devices in PD channels. 
> 
> After driver is loaded the user cannot be permitted to modify this
> value. If the user needs to see the devices in the PD channels, (s)he
> may initiate a scan via sysfs/proc based on the kernel being used.
> Once the user has done the scan, the fast_load value does not have any
> significance and thus not exposed for reading.
> 
> cmd_per_lun & max_sectors are also intended to be provided by user
> only at driver load time. In the current implementation both these do
> appear as read-only values under host# in sysfs. The current design is
> not to allow these values to be modified on the fly. 

fastload sounds reasonable.  cmd_per_lun and max_sectors could
reasonably be altered at runtime ... just execute and unbind and rebind
operation to make them take effect.

James



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