linux-kernel - RE: [PATCH 00/25] Staging: hv: Cleanup vmbus driver code

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Message-ID: <6E21E5352C11B742B20C142EB499E0481DF253@TK5EX14MBXC124.redmond.corp.microsoft.com>
Date:	Sun, 1 May 2011 15:46:23 +0000
From:	KY Srinivasan <kys@...rosoft.com>
To:	Christoph Hellwig <hch@...radead.org>, Greg KH <greg@...ah.com>
CC:	"gregkh@...e.de" <gregkh@...e.de>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"devel@...uxdriverproject.org" <devel@...uxdriverproject.org>,
	"virtualization@...ts.osdl.org" <virtualization@...ts.osdl.org>
Subject: RE: [PATCH 00/25] Staging: hv: Cleanup vmbus driver code



> -----Original Message-----
> From: Christoph Hellwig [mailto:hch@...radead.org]
> Sent: Sunday, May 01, 2011 11:41 AM
> To: Greg KH
> Cc: KY Srinivasan; Christoph Hellwig; gregkh@...e.de; linux-
> kernel@...r.kernel.org; devel@...uxdriverproject.org;
> virtualization@...ts.osdl.org
> Subject: Re: [PATCH 00/25] Staging: hv: Cleanup vmbus driver code
> 
> On Fri, Apr 29, 2011 at 09:40:25AM -0700, Greg KH wrote:
> > Are you sure the libata core can't see this ide controller and connect
> > to it?  That way you would use the scsi system if you do that and you
> > would need a much smaller ide driver, perhaps being able to merge it
> > with your scsi driver.
> >
> > We really don't want to write new IDE drivers anymore that don't use
> > libata.
> 
> The blkvsc driver isn't an IDE driver, although it currently claims
> the old IDE drivers major numbers, which is a no-no and can't work
> in most usual setups.

What is the issue here? This is no different than what is done in other
Virtualization platforms. For instance, the Xen blkfront driver is no
different - if you specify the block device to be presented to the guest
as an ide device, it will register for the appropriate ide major number.

Regards,

K. Y 

> I'm pretty sure I already complained about
> this in a previous review round.


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