Re: [PATCH 1/3] [RFC] genhd: add a new attribute in device structure

From: Nao Nishijima
Date: Thu Jun 16 2011 - 08:04:05 EST

Hi Greg,

(2011/06/16 0:33), Greg KH wrote:
> On Wed, Jun 15, 2011 at 05:16:28PM +0900, Nao Nishijima wrote:
>> Allow users to set the preferred name of device via sysfs interface.
>> (Exsample) sda -> foo
>> # echo foo > /sys/block/sda/preferred_name
>> Suggested-by: James Bottomley <James.Bottomley@xxxxxxxxxxxxxxxxxxxxx>
>> Suggested-by: Jon Masters <jcm@xxxxxxxxxx>
>> Signed-off-by: Nao Nishijima <nao.nishijima.xt@xxxxxxxxxxx>
> You don't document this new sysfs file (which is required), nor do you
> explain what it is for and how to use it.
> Please do that in this patch, and in a Documentation/ABI/ file for any
> new sysfs file you create.

I'm afraid that my explanation was not enough.
I will add explanation to this patch and Documentation/ABI file.

> I still fail to understand how a "preferred" file will help anyone out
> here at all...

Let me explain, users cannot identify a device from a device name
because device names may change at each boot up time. If kernel show
preferred names in kernel messages, users can easily identify a device
from kernel messages.

> greg k-h


Software Platform Research Dept. Linux Technology Center
Hitachi, Ltd., YOKOHAMA Research Laboratory
Emailï nao.nishijima.xt@xxxxxxxxxxx
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