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Re: [Xen-devel] Please revert / review 077fc1c04d70ef1748ac2daa6622b3320a1a004c

>>> On 19.06.14 at 18:22, <matthias.kannenberg@xxxxxxxxxxxxxx> wrote:
> Test 2:
> Xen-Version: Compiled a normal 077 commit version without any of your
> patches
> Xen cmd line: added immo=no-sharept as suggested
> Passed-through devices: vga, 2 usb controller (ohci+ehci), sound card
> Result: works fine. domU boots, no BSOD, no other problems, server seems to
> be stable. So not sharing the VT-d page tables seems to do the trick / the
> problem is in the page table sharing.

Just to clarify - page table sharing is intended to get disabled in
-unstable on the AMD side (
still awaiting an AMD IOMMU maintainer ack). But as that's not
immediately a backporting candidate, understanding the problem
to find a solution also for 4.4.x would still be necessary.


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