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Re: [Xen-devel] xen/arm Problem with virtual disks

On Wed, 2013-09-18 at 17:03 +0300, Andrii Anisov wrote:
> Hello,
> I'm trying to provide my DomU with virtual disk but have faced some
> strange issue. Disk device is discovered in DomU but it is not usable.
> In DomU some trash is read from the xvd* device, and does not reflect
> what is read from the correspondent device in Dom0. Moreover trash
> read from the device differs each time (I checked that by dd)
> I have xen 4.3 release with my patches for panda5 board.
> Dom0 is K3.8, DomU is K3.4.

Did 3.4 really have Xen on ARM support? I thought we started later than

> Could it be a problem in contradiction of blkfront and blkback in
> different kernels?

We did iterate a few times on the ABI before getting to a stable point.
I don't recall precisely when or whether that made any difference to the
block protocol though.

> Could you please give me some clue to debug such an issue?

I'd definitely recommend starting by pulling your domU kernel up to
something more recent, e.g. 3.8 like dom0.


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