Re: [Xen-devel] Is: EPT violations. Was:Re: Problems with pci/vga passthrough

[Diederik de Haas <didi.debian@xxxxxxxxx>]

On zondag 22 januari 2017 19:30:17 CET you wrote:
> One particular thing I noticed is that I get (something that looks like) a 
> kernel crash when booting the kernel with Xen, which I don't get when
> choosing  the GRUB option without Xen.
> See `cknowsvr01-dmesg-with-xen.txt` vs `cknowsvr01-dmesg-without-xen.txt`.

Reported it at https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=852324 but 
given Ben Hutchings' reaction it seems to be a Xen problem after all.

Relevant part of earlier attached dmesg:

[   13.588386] WARNING: CPU: 18 PID: 1 at 
/build/linux-zDY19G/linux-4.8.15/arch/x86/mm/dump_pagetables.c:225 
note_page+0x5e8/0x790
[   13.588388] x86/mm: Found insecure W+X mapping at address 
ffff880000000000/0xffff880000000000
...
[   13.608867] x86/mm: Checked W+X mappings: FAILED, 4602 W+X pages found.

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