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Re: [Xen-devel] kernel BUG at drivers/xen/balloon.c:528!

To: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
Subject: Re: [Xen-devel] kernel BUG at drivers/xen/balloon.c:528!
From: Łukasz Oleś <lukaszoles@xxxxxxxxx>
Date: Mon, 19 Jul 2010 15:12:07 +0200
Cc: "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>
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W dniu 16 lipca 2010 18:39 użytkownik Stefano Stabellini
<stefano.stabellini@xxxxxxxxxxxxx> napisał:
> On Fri, 16 Jul 2010, Łukasz Oleś wrote:
>> W dniu 15 lipca 2010 19:41 użytkownik Stefano Stabellini
>> <stefano.stabellini@xxxxxxxxxxxxx> napisał:
>> > On Thu, 15 Jul 2010, Jeremy Fitzhardinge wrote:
>> >> On 07/15/2010 04:07 AM, Łukasz Oleś wrote:
>> >> > Hi,
>> >> >
>> >> > I'm getting kernel panic during boot latest xen/next.
>> >> >
>> >>
>> >> Booting PV or HVM?
>> >>
>> >
>> > This bug is caused by backend drivers trying to initialize in a PV on
>> > HVM guest.
>> > The last port of my series on xen/next should have the right fix.
>> >
>> Now I have problem with vbd and vifs.
>> vbd vbd-51712: 28 granting access to ring page
>> vbd vbd-51712: 28 xenbus_dev_probe on device/vbd/51712
>> vbd: probe of vbd-51712 failed with error -28
>> vbd vbd-51728: 28 granting access to ring page
>> vbd vbd-51728: 28 xenbus_dev_probe on device/vbd/51728
>> vbd: probe of vbd-51728 failed with error -28
>> vbd vbd-51744: 28 granting access to ring page
>> vbd vbd-51744: 28 xenbus_dev_probe on device/vbd/51744
>> vbd: probe of vbd-51744 failed with error -28
>> Initialising Xen virtual ethernet driver.
>> #### netfront can't alloc tx grant refs
>> vif vif-0: 12 creating netdev
>> vif vif-0: 12 xenbus_dev_probe on device/vif/0
>> vif: probe of vif-0 failed with error -12
>> #### netfront can't alloc tx grant refs
>> vif vif-1: 12 creating netdev
>> vif vif-1: 12 xenbus_dev_probe on device/vif/1
>> vif: probe of vif-1 failed with error -12
>> #### netfront can't alloc tx grant refs
>> vif vif-2: 12 creating netdev
>> vif vif-2: 12 xenbus_dev_probe on device/vif/2
>> vif: probe of vif-2 failed with error -12
>> Full log in attachment, vm config is posted in earlier message.
> The warnings are due to the fact that CONFIG_XEN_PLATFORM_PCI is not
> enabled in your config but the kernel tries to initialize the pv
> frontends anyway, the patch I have just sent to the list should fix this
> issue.

Yes, their gone now

> In any case you should enable CONFIG_XEN_PLATFORM_PCI in your kernel
> config, otherwise the pv frontends won't load properly and you are not
> going to have any benefits running a PV on HVM kernel.
> I am not sure why you cannot mount your root device, maybe you didn't
> specify the correct root= in your kernel command line options?

It works fine on bare metal and  ESX. It looks like in initrd system
doesn't see any disks.

When I enabled option CONFIG_XEN_PLATFORM_PCI I was finally able to
boot my sytem. Is this suposed to work in this way?

Łukasz Oleś

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