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From: Hannes Reinecke <hare@suse.de>
To: James Bottomley <jbottomley@parallels.com>
Cc: "linux-scsi@vger.kernel.org" <linux-scsi@vger.kernel.org>,
	"bvanassche@acm.org" <bvanassche@acm.org>,
	"hch@infradead.org" <hch@infradead.org>,
	"dgilbert@interlog.com" <dgilbert@interlog.com>,
	"jlinton@tributary.com" <jlinton@tributary.com>,
	"kai.makisara@kolumbus.fi" <kai.makisara@kolumbus.fi>,
	"kay@vrfy.org" <kay@vrfy.org>
Subject: Re: [PATCH 3/5] Add EVPD page 0x83 to sysfs
Date: Mon, 10 Mar 2014 21:52:03 +0100	[thread overview]
Message-ID: <531E25F3.6090102@suse.de> (raw)
In-Reply-To: <1394475897.2565.46.camel@dabdike.int.hansenpartnership.com>

On 03/10/2014 07:24 PM, James Bottomley wrote:
> On Mon, 2014-03-10 at 15:28 +0100, Hannes Reinecke wrote:
>> EVPD page 0x83 is used to uniquely identify the device.
>> So instead of having each and every program issue a separate
>> SG_IO call to retrieve this information it does make far more
>> sense to display it in sysfs.
>
> Christoph's suggestion of binary sysfs attributes for this rather than
> the text ones you have is better ... because your current ones are going
> to truncate when they run off the one page of data sysfs text attributes
> get (i.e. about 2k of vpd).
>
Yes, I thought of that, too.
I thought to remember that binary attributes are reserved for 
firmware/hardware-dependent interfaces.
If that's not the case I'll be moving to a binary attribute here.
Will be resending the patchset.

What should happen with the first patch in the series, then?
When moving to a binary attribute the first patch isn't required 
anymore; should I drop it or send as a separate patch?

Cheers,

Hannes
-- 
Dr. Hannes Reinecke		      zSeries & Storage
hare@suse.de			      +49 911 74053 688
SUSE LINUX Products GmbH, Maxfeldstr. 5, 90409 Nürnberg
GF: J. Hawn, J. Guild, F. Imendörffer, HRB 16746 (AG Nürnberg)
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  reply	other threads:[~2014-03-10 18:49 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-03-10 14:28 [PATCHv8 0/5] Display EVPD pages in sysfs Hannes Reinecke
2014-03-10 14:28 ` [PATCH 1/5] scsi_sysfs: Implement 'is_visible' callback Hannes Reinecke
2014-03-10 14:28 ` [PATCH 2/5] scsi: Return VPD page length in scsi_vpd_inquiry() Hannes Reinecke
2014-03-12 21:14   ` Muthukumar R
2014-03-12 21:43     ` Douglas Gilbert
2014-03-12 23:21       ` Muthukumar R
2014-03-13  6:45     ` Hannes Reinecke
2014-03-10 14:28 ` [PATCH 3/5] Add EVPD page 0x83 to sysfs Hannes Reinecke
2014-03-10 18:24   ` James Bottomley
2014-03-10 20:52     ` Hannes Reinecke [this message]
2014-03-11  4:14       ` James Bottomley
2014-03-11 11:56         ` Hannes Reinecke
2014-03-11 10:55           ` James Bottomley
2014-03-13  1:53             ` Martin K. Petersen
2014-03-13  3:31               ` James Bottomley
2014-03-12  8:03       ` hch
2014-03-10 14:28 ` [PATCH 4/5] Add EVPD page 0x80 " Hannes Reinecke
2014-03-10 14:28 ` [PATCH 5/5] ses: Use vpd information from scsi_device Hannes Reinecke
2014-03-10 18:20   ` James Bottomley
2014-03-10 20:44     ` Hannes Reinecke

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