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

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Message-ID: <4DF9F11F.705@hitachi.com>
Date:	Thu, 16 Jun 2011 21:03:43 +0900
From:	Nao Nishijima <nao.nishijima.xt@...achi.com>
To:	Greg KH <greg@...ah.com>
Cc:	linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
	James.Bottomley@...senPartnership.com, kay.sievers@...y.org,
	jcm@...hat.com, hare@...e.de, stefanr@...6.in-berlin.de,
	yrl.pp-manager.tt@...achi.com
Subject: Re: [PATCH 1/3] [RFC] genhd: add a new attribute in device structure

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@...senPartnership.com>
>> Suggested-by: Jon Masters <jcm@...hat.com>
>> Signed-off-by: Nao Nishijima <nao.nishijima.xt@...achi.com>
> 
> 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
> 

Thanks,

-- 
Nao NISHIJIMA
Software Platform Research Dept. Linux Technology Center
Hitachi, Ltd., YOKOHAMA Research  Laboratory
Email： nao.nishijima.xt@...achi.com
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