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Re: [Xen-devel] linux 3.3-pre-rc1: Starting domU fails with Error: Failed to query current memory allocation of dom0.

On Thu, Jan 12, 2012 at 01:38:32PM +0100, Sander Eikelenboom wrote:
> Hi Konrad,
> Today i tried linuses tree of today (last commit is 
> 4c4d285ad5665bfbd983b95fde8d7a477d24a361).
> It boots dom0 fine, but it fails to start any domU with: "Error: Failed to 
> query current memory allocation of dom0."
> With my previous 3.1.5 kernel everything is fine, nothing else changed in 
> config in between.

Hey Kay,

Your patch that converts the xen-balloon to use the regular device bus driver
(070680218379e15c1901f4bf21b98e3cbf12b527) has some not-so-happy consequences.

The toolstack (xen-tools) use:


But with the change, it is now:


Which means that the tools can't find it now.

I did not see anything in feature-removal-schedule.txt so I don't know
exactly when the full sys_device structure is going away.

Is there any work-arounds that can be inserted in the kernel so that
the old directory still exists at least for 3.3 such that there will be
enough time for the tool-stack to be updated?

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