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[Xen-users] Re: [Xen-devel] Xen 3.4.3and CentOS PCIback

To: David Gonzalez Herrera <dgonzalezh@xxxxxxxxx>
Subject: [Xen-users] Re: [Xen-devel] Xen 3.4.3and CentOS PCIback
From: Sander Eikelenboom <linux@xxxxxxxxxxxxxx>
Date: Thu, 11 Nov 2010 10:45:52 +0100
Cc: xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>, xen-users <xen-users@xxxxxxxxxxxxxxxxxxx>
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Thursday, November 11, 2010, 2:44:38 AM, you wrote:

>  Hey Sander,

> Thanks.

> On Wed, Nov 10, 2010 at 1:16 PM, Sander Eikelenboom 
> <linux@xxxxxxxxxxxxxx>wrote:

>> Hello David,
>> My suggestions would be:
>> - use pciback.hide=(03:01.0) option on the kernel line in your bootloader,
>> to seize the device, so dom0 never initializes it.

> you mean "pciback.hide=(03:01.0)" going into Dom0 kernel line and on which
> one:

On the  "module    /vmlinuz-2.6.18-194.17.4.el5xen ro root=/dev/gw/root 
console=hvc0 earlyprintk=xen nomodeset " one.

(if you are going to use a pvops kernel in the future it will have to change to 
xen-pciback.hide=(03:01.0) BTW)

> My grub.conf looks like this:

> title     CentOS (2.6.18-194.17.4.el5xen)
> root      (hd0,0)
> kernel    /xen.gz-3.4.3 dom0_mem=1024M physdev_dom0_hide=(03:01.0)
> iommu=verbose loglvl=all guest_loglvl=all
> module    /vmlinuz-2.6.18-194.17.4.el5xen ro root=/dev/gw/root console=hvc0
> earlyprintk=xen nomodeset
> module    /initrd-2.6.18-194.17.4.el5xen.img

> - Why do you use the "@1" in your domU config and not just pci=['03:01.0']
>>  ?

> Well thst' nothing, I was reading on XEN's pvops kernel docs that you can
> arbitrarily assign the device to a specific virtual slot.

>> - I personally always use the passthrough option for pciback when compiling
>> the dom0 kernel, but i don't think that matters much, although perhaps not
>> everything plays nice with a device on 0000:00:00.0

> Well I havrn't messed up with kernel compilation, I would like pv_ops kernel
> so I played a bit with that but not with this 2.6.18, would have to do some
> research on it.

> I also removed the @ from the pci=('') line,

> Thanks for the help and I'll do as you say but if you or someone has any
> other insight on this it'd be nice to hear it

> Thanks.

> ---
> David Gonzalez H.
> Phone Bogotá: +(57-1)289-1168
> Phone Medellin: +(57-4)247-0985
> Mobile: +(57)315-838-8326
> MSN: david@xxxxxxxxxxxxxxxx
> Skype: davidgonzalezh
> WEB: http://www.dghvoip.com/
> Proud Linux User #294661

Best regards,
 Sander                            mailto:linux@xxxxxxxxxxxxxx

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