Re: [Xen-users] New binary release of GPL PV drivers for Windows

["Emre Erenoglu" <erenoglu@xxxxxxxxx>]

Hi Jim, some comments below:

On Feb 3, 2008 3:08 AM, jim burns <jim_burn@xxxxxxxxxxxxx> wrote:

On Saturday 02 February 2008 08:44:23 pm James Harper wrote:
> > Feb  2 18:03:42 Insp6400 kernel: blkback: ring-ref 2047, event-channel 5,
> > protocol 1 (x86_32-abi)
> > Feb  2 18:03:42 Insp6400 kernel: blkback: ring-ref 2046, event-channel 6,
> > protocol 1 (x86_32-abi)
>
> That tells me you are running a Dom0 with Xen 3.1.1+ patches applied. Is
> that correct?

Xen 3.1.2, kernel 2.6.21 w/xen.gz compiled from 3.1.0-rc7 (by fedora), all
32bit PAE.

> If you could send me a screen capture of the BSoD, or just the numbers
> on it, that could be useful.

*** STOP: 0x0000007B (0xF8AB9524,0xC0000034,0x00000000,0x00000000)

This seems to be the  same as my problem, Inaccessible Boot Device. Can you try without installing the "xenhide" driver, and then trying an xm block-attach on your domain? The driver loads the new disk but can't access with a 0 mb size etc.

> Yours and others' feedback tells me that I haven't actually fixed the
> bug that a lot of people had reported. And I just can't reproduce the
> problem. What version of Windows are you testing under? I need to know
> the product (eg windows 2003 std edition r2) and what service packs you
> have applied.

WinXP Pro SP2.

> > both windows connections were using the same mac address, and the '2'
> > connection was being ignored by my router/dhcp server. I went into windows
> > Start -> Connect To -> Show all connections, and disabled the original
> > Local Area Connection.
> >
> > I must say, I don't actually see any speed improvements in my crude tests.
Do
> > I have to do anything to configure the hard disk in windows like I had to
> > disable one of my Local Area Connections?
>
> You should disable the existing qemu-provided LAN device, otherwise you
> probably won't see any difference.

As I said, I did disable the original 'Local Area Connection'. I was asking
about the hard disk.

As long as the xenhide driver works and the xenvbd driver handles the disk access, you won't see any difference. In order to confirm, your disk device under device manager, looking at it by view type "by connection", you shall see that the disk is under the xenvbd SCSI controller device.  If it's still under IDE controller Intel, then you'll see no speed difference.

> > What about the remaining PCI devices under 'Other Devices' in Device
Manager,
> > console and vfb, that you didn't have drivers for? I didn't notice any
> > mention of them in the ToDo.
>
> I just disable them. I don't know that there is any benefit in providing
> PV drivers for them. I might put a stub driver together so at least they
> don't stand out in device manager.

Actually, the console is the one area of hvm that cries the most for a speed
increase. Don't know how much can actually be done with a virtual card, tho'.

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Best regards,
erenoglu@xxxxxxxxx
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