linux-kernel - RE: Linux on Hyper-V 1) cd006086fa5d ata_piix: defer disks to the Hyper-V drivers by default 2) db63a4c8115a libata: add a host flag to ignore detected ATA device FW: use hv_storvsc instead of ata_piix to handle the IDE disks devices ( but not for the ...

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Message-ID: <426367E2313C2449837CD2DE46E7EAF90710C295@SN2PRD0310MB382.namprd03.prod.outlook.com>
Date:	Fri, 1 Jun 2012 19:23:00 +0000
From:	KY Srinivasan <kys@...rosoft.com>
To:	Greg KH <gregkh@...uxfoundation.org>, Victor Miasnikov <vvm@....by>
CC:	"stable@...r.kernel.org" <stable@...r.kernel.org>,
	Jonathan Nieder <jrnieder@...il.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: Linux on Hyper-V 1) cd006086fa5d ata_piix: defer disks to the
 Hyper-V drivers by default 2) db63a4c8115a libata: add a host flag to ignore
 detected ATA device FW: use hv_storvsc instead of ata_piix to handle the IDE
 disks devices ( but not for the ...



> -----Original Message-----
> From: Greg KH [mailto:gregkh@...uxfoundation.org]
> Sent: Friday, June 01, 2012 12:26 PM
> To: Victor Miasnikov
> Cc: stable@...r.kernel.org; Jonathan Nieder; linux-kernel@...r.kernel.org; KY
> Srinivasan
> Subject: Re: Linux on Hyper-V 1) cd006086fa5d ata_piix: defer disks to the Hyper-
> V drivers by default 2) db63a4c8115a libata: add a host flag to ignore detected
> ATA device FW: use hv_storvsc instead of ata_piix to handle the IDE disks devices
> ( but not for the ...
> 
> On Fri, Jun 01, 2012 at 07:17:33PM +0300, Victor Miasnikov wrote:
> > Hi!
> >
> > >> cd006086fa5d ata_piix: defer disks to the Hyper-V drivers by default
> > >>and its prerequisite
> > >> db63a4c8115a libata: add a host flag to ignore detected ATA devices
> >
> > >Sorry, but I don't see how this meets the rules for the stable trees, do you?  If
> so, please show me how.
> >
> > About "how"  -- ask K.Y. Srinivasan
> >
> > Hyper-V admins need _worked_ Linux v3.4.X / v3.3.X / v3.2.X
> >
> > Please, _fix_ errors related "use hv_storvsc instead of ata_piix to
> > handle the IDE disks devices ( but not for the CD-ROM)"
> 
> Ok, I'll wait for KY to explain this.

Greg,

Clearly I cannot tell you anything about this that you don't know! Looking at the 
rules for stable tree patches, this patch does not satisfy the requirement that
the patch fix a bug since we are changing the behavior here of the ata driver to
accommodate Hyper-V. I don't know how much flexibility you have here for
taking patches that improve the general usability of Linux in different
environments. All I can say is that It will be nice to have this patch in previous stable 
releases.

Regards,

K. Y



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