Re: [Xen-devel] [PATCH] Allow blktap to be able to be booted as system volume for PV-on-HVM(TAKE 2)

["Kasai Takanori" <kasai.takanori@xxxxxxxxxxxxxx>]

Hi Okamoto-san,

Thank you for reply.

> Why did you make a patch only for boot disk?
Because it is not necessary to start with the emulator excluding the system
disk.

The system disk cannot be booted if it doesn't work by the emulator first.
But the data disk will work as blktap if PV driver works after booting.


There is a reason why all xvd* is not replaced with hd* either.

We are working the system disk as hda and CDROM device as hdc.
Moreover, we are working the data disk as xvd *.

disk  = [ 'tap:aio:/image/systemdisk.img,hda,w',
             'phy:/dev/cdrom,hdc:cdrom,r',
             'tap:aio:/image/data1.img,xvda,w',
             'tap:aio:/image/data2.img,xvdb,w',
             'tap:aio:/image/data3.img,xvdc,w',
             'tap:aio:/image/data4.img,xvdd,w',
              ....   ]

Therefore, when xvd * is replaced to hd*,
hd* usually used by the HVM domain cannot be used.

Best Regards,

--
Takanori Kasai

----- Original Message ----- 
From: "Takekazu Okamoto" <tokamoto@xxxxxxxxxx>
To: "xen-devel" <xen-devel@xxxxxxxxxxxxxxxxxxx>
Sent: Thursday, July 19, 2007 2:46 PM
Subject: Re: [Xen-devel] [PATCH] Allow blktap to be able to be
bootedassystemvolume for PV-on-HVM(TAKE 2)


> Kasai-san,
>
> Why did you make a patch only for boot disk?
> I have a patch for all disks on SLES10SP1 (3.0.4). (Not yet in
> SLES10SP1 tree)
> Windows can boot up in HVM domain with our PV drivers for blktap
> disks.
> For your reference, it is attached in this mail.
> I know this is for 3.0.4, not applicable for latest.
>
> Regards,
> Takekazu Okamoto
> Novell Japan
>
> > > > "Kasai Takanori" <kasai.takanori@xxxxxxxxxxxxxx> 2007/07/19 13:41
> Hi All,
>
> I sent the patch to make blktap work with PV-on-HVM.
> For system volume to boot hda or xvda, I corrected the patch.
> However, the patch has not been applied yet.
> Could you apply this patch? Or, please give the comment to me.
>
> Best Regards,
>
> ---
> Takanori Kasai
>
>
> ----- Original Message ----- 
> From: "Kasai Takanori" <kasai.takanori@xxxxxxxxxxxxxx>
> To: "xen-devel" <xen-devel@xxxxxxxxxxxxxxxxxxx>
> Sent: Thursday, July 12, 2007 9:13 AM
> Subject: [Xen-devel] [PATCH] Allow blktap to be able to be booted as
> systemvolume for PV-on-HVM(TAKE 2)
>
>
> > Hi All,
> >
> > I sent the patch to make blktap work with PV-on-HVM.
> > For system volume to boot hda or xvda,
> > I corrected the patch.
> >
> > Signed-off-by: Takanori Kasai <kasai.takanori@xxxxxxxxxxxxxx>
> >
> > This patch made it possible to use either.
> >
> > disk = [ 'tap:aio:/xen/test/rhel5ga_full.img,hda,w' ]
> > or
> > disk = [ 'tap:aio:/xen/test/rhel5ga_full.img,xvda,w' ]
> >
> > It is assumed that hda is a volume of the system
> > if both xvda and hda are specified.
> >
> > disk = [ 'file:/xen/test/rhel5ga_full.img,hda,w',
> >         'tap:aio:/xen/test/drive2.img,xvda,w' ]
> >
> > Best Regards,
> >
> > --
> > Takanori Kasai
> >
> >
> > ----- Original Message ----- 
> > From: "Kasai Takanori" <kasai.takanori@xxxxxxxxxxxxxx>
> > To: "xen-devel" <xen-devel@xxxxxxxxxxxxxxxxxxx>
> > Sent: Friday, July 06, 2007 7:50 PM
> > Subject: [Xen-devel] [PATCH] Allow blktap to be able to be booted as
> > systemvolume for PV-on-HVM
> >
> >
> > > Hi All,
> > >
> > > We were testing the PV driver on the HVM domain.
> > > When blktap was booting system volume, PV-on-HVM domain was not able
> to be
> > > started.
> > >
> > > The configuration file is specified as follows.
> > > disk = [ 'tap:aio:/xen/test/rhel5ga_full.img,hda,w' ]
> > >
> > > The error occurred by the initialization of system volume in
> qemu-dm.
> > > qemu: could not open hard disk image
> 'aio:/xen/test/rhel5ga_full.img'
> > > It is because "aio:" is added to the head of params in xenstore.
> > > However, qemu-dm open device by params.
> > >
> > > This patch corrected the problem of params on the qemu-dm.
> > >
> > > Signed-off-by: Takanori Kasai <kasai.takanori@xxxxxxxxxxxxxx>
> > > Signed-off-by: Tomonari Horikoshi <t.horikoshi@xxxxxxxxxxxxxx>
> > > Signed-off-by: Tsunehisa Doi <Doi.Tsunehisa@xxxxxxxxxxxxxx>
> > >
> > > The execution result is as follows.
> > >
> > > # xm create -f rhel5ga_vti.conf
> > > Using config file "./rhel5ga_vti.conf".
> > > Started domain RHEL5GA-test2
> > > # xm block-list RHEL5GA-test2
> > > Vdev  BE handle state evt-ch ring-ref BE-path
> > > 768    0    0     1      -1     -1
> /local/domain/0/backend/tap/75/768
> > > ...      <<= /* Waiting for booting process */
> > > # xm block-list RHEL5GA-test2
> > > Vdev  BE handle state evt-ch ring-ref BE-path
> > > 768    0    0     4      7      8
> /local/domain/0/backend/tap/75/768
> > > Best Regards,

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