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Re: [Xen-devel] Question about "xen: Revert commits da72ff5bfcb0 and 72a9b186292d"

Hi Juergen,

We run Xen as dom0 with Windows domU's.

Now with older 4.9.x kernels, we had BSOD's when we booted a domU with old Xen drivers in it.
With the newest kernel (4.9.34), this seems to be resolved.

I was wondering what caused this. And that patch triggered my attention :)


Op 2017-07-04 14:40, schreef Juergen Gross:
On 04/07/17 13:54, Jean-Louis Dupond wrote:
Hi All,

We had some issues with BSOD's on Windows at startup when using some old
Xen drivers inside Windows.
Now when we upgrade to the most recent 4.9.x kernel. The issue seems to
be resolved.

Could it be that the following commit fixes the issue:


As far as I can see it only breaks Xen < 4.0. But could it be it also
breaks Windows VM's with old Xen drivers?

Umm, I don't get it.

Are you using Windows or Linux? Above commit is for the Linux kernel
running as HVM domain. It shouldn't be able to modify behavior of a
Windows guest at all.


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