linux-kernel - Re: [PATCH 8/19]: SCST SYSFS interface implementation

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Message-ID: <4CE199E2.5030106@vlnb.net>
Date:	Mon, 15 Nov 2010 23:36:50 +0300
From:	Vladislav Bolkhovitin <vst@...b.net>
To:	Dmitry Torokhov <dmitry.torokhov@...il.com>
CC:	Greg KH <greg@...ah.com>, Boaz Harrosh <bharrosh@...asas.com>,
	linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
	scst-devel <scst-devel@...ts.sourceforge.net>,
	James Bottomley <James.Bottomley@...senPartnership.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>,
	Mike Christie <michaelc@...wisc.edu>,
	Vu Pham <vuhuong@...lanox.com>,
	Bart Van Assche <bart.vanassche@...il.com>,
	James Smart <James.Smart@...lex.Com>,
	Joe Eykholt <jeykholt@...co.com>, Andy Yan <ayan@...vell.com>,
	Chetan Loke <generationgnu@...oo.com>,
	Hannes Reinecke <hare@...e.de>,
	Richard Sharpe <realrichardsharpe@...il.com>,
	Daniel Henrique Debonzi <debonzi@...ux.vnet.ibm.com>
Subject: Re: [PATCH 8/19]: SCST SYSFS interface implementation

Dmitry Torokhov, on 11/15/2010 09:59 AM wrote:
> On Sat, Nov 13, 2010 at 03:59:38PM -0800, Greg KH wrote:
>> On Sat, Nov 13, 2010 at 08:20:18PM +0300, Vladislav Bolkhovitin wrote:
>>> So, I decided to reimplement it to be completely synchronous. SYSFS
>>> authors did really great job and thanks to the excellent internal SYSFS
>>> design and implementation it is absolutely safe. See:
>>>
>>> [root@tgt ~]# modprobe scst
>>> [root@tgt ~]# cd /sys/kernel/scst_tgt/
>>
>> Sorry, but no, you can't put this in /sys/kernel/ without getting the
>> approval of the sysfs maintainer.
>>
>> I really don't understand why you are using kobjects in the first place,
>> why isn't this in the main device tree in the kernel, using 'struct
>> device'?
> 
> It is my understanding that Vlad is able to reflect the topology by
> manipulating sysfs objects there.

Correct. As I wrote in the previous e-mail, SCST doesn't deal with
devices, so doesn't have a need to use struct device.

>> In the end, I guess it really doesn't matter as this code isn't getting
>> merged so I shouldn't worry about it, right?
>>
> 
> This is quite unfortunate as I still have not seen the public comparison
> of the 2 implementations and the lists of benefits and shortfalls for
> both of them.

Indeed, it is unfortunate :(. Undercover political games continue...

Vlad
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