linux-kernel - RE: [PATCH 1 of 1] cciss: add procfs interface to rescan logical volumes

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Message-ID: <0F5B06BAB751E047AB5C87D1F77A77884C00C15F14@GVW0547EXC.americas.hpqcorp.net>
Date:	Tue, 7 Oct 2008 17:33:35 +0000
From:	"Miller, Mike (OS Dev)" <Mike.Miller@...com>
To:	Arjan van de Ven <arjan@...radead.org>
CC:	Andrew Morton <akpm@...ux-foundation.org>,
	"JensAxboejens.axboe@...cle.com" <JensAxboejens.axboe@...cle.com>,
	LKML <linux-kernel@...r.kernel.org>,
	LKML-scsi <linux-scsi@...r.kernel.org>
Subject: RE: [PATCH 1 of 1] cciss: add procfs interface to rescan logical
 volumes



> -----Original Message-----
> From: Arjan van de Ven [mailto:arjan@...radead.org]
> Sent: Tuesday, October 07, 2008 11:36 AM
> To: Miller, Mike (OS Dev)
> Cc: Andrew Morton; JensAxboejens.axboe@...cle.com; LKML; LKML-scsi
> Subject: Re: [PATCH 1 of 1] cciss: add procfs interface to
> rescan logical volumes
>
> On Tue, 7 Oct 2008 11:24:54 -0500
> Mike Miller <mike.miller@...com> wrote:
>
> > Patch 1 of 1
> >
> > This patch adds a procfs interface so users can force a
> rescan of the
> > logical volumes attached to the controller. A new product
> uses Target
> > Based Management (TBM) out-of-band for configuration purposes. With
> > this method the driver has no way of knowing that something has
> > changed, i.e., new logical volume(s) added or existing volumes
> > deleted. This interface allows the user to echo "rescan volumes" >
> > /proc/driver/cciss/ccissN to force the driver to rebuild
> our table of
> > logical volumes.
> > Please consider this patch for inclusion.
>
>
> I'll ask the obvious question (since you didn't address this)...
> why is this a proc thing and not just a sysfs attribute of the device?
>

Because I'm pretty sysfs stupid. :(

An attribute in sysfs is the ultimate goal but I did this for expediency. Any pointers to sysfs documentation that's either not very outdated or doesn't contradict itself?

Thanks,
mikem

>
> --
> Arjan van de Ven        Intel Open Source Technology Centre
> For development, discussion and tips for power savings, visit
> http://www.lesswatts.org
>
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