Re: [Xen-devel] xenpaging crashes xen in is_iomem_page()

[Patrick Colp <pjcolp@xxxxxxxxx>]

I pulled the latest version of Xen (revision 21859) and ran it on my
EPT box and then ran xenpaging and it's working fine for me.

Have you tried paging more than just 1 page? Not sure why that should
make a difference, but it's worth trying. Also, do you have any
modifications/patches applied to your tree that aren't part of
xen-unstable? Is the guest you're attempting to run xenpaging on an
HVM guest?


Patrick


On 27 July 2010 11:20, Olaf Hering <olaf@xxxxxxxxx> wrote:
> On Mon, Jul 26, Patrick Colp wrote:
>
>> I've not seen this error before. Does your computer have EPT support?
>
> Now I got another system with X5550 cpu, i7 based.
> x86info reports:
> ...
> CPU #8
> EFamily: 0 EModel: 1 Family: 6 Model: 26 Stepping: 5
> CPU Model: Core i7 (Nehalem)
> Processor name string: Intel(R) Xeon(R) CPU           X5550  @ 2.67GHz
>
> And it still crashes this way.
>
> XEN reports this during boot:
>
> ...
> (XEN) VMX: Supported advanced features:
> (XEN)  - APIC MMIO access virtualisation
> (XEN)  - APIC TPR shadow
> (XEN)  - Extended Page Tables (EPT)
> (XEN)  - Virtual-Processor Identifiers (VPID)
> (XEN)  - Virtual NMI
> (XEN)  - MSR direct-access bitmap
> (XEN) EPT supports 2MB super page.
> (XEN) HVM: ASIDs enabled.
> (XEN) HVM: VMX enabled
> (XEN) HVM: Hardware Assisted Paging detected.
> (XEN) Brought up 8 CPUs
> ...
>
>
> So, is xenpaging really working for you?
>
>
> Olaf
>
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