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

[Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>]

On 01/24/2017 11:11 AM, Jan Beulich wrote:
>>>> On 24.01.17 at 16:59, <didi.debian@xxxxxxxxx> wrote:
>> 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.
> Now this is a know issue, but I'm pretty convinced one that's entirely
> unrelated to your problem.


I thought we fixed this. That's what is_hypervisor_range() was
introduced for, and I haven't seen this warning since then.


-boris

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