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Re: [Xen-devel] Intermittent fatal page fault with XEN 4.3.1 (Centos 6.3 DOM0 with linux kernel 3.10.16.)


I will give your patch a try.
I have to recant my previous statement regarding not using nested-virt.
It seems some of the code that is being executed on the vm contains vmx 
Since by virtue of running this code in an hvm subject make it nested-virt.

This raises a question, if this functionality is undesired can we just disable 
nested virt by adding
nestedhvm=false to the configuration file?  Should the cpuid and cupid_check 
settings be changed as well?


On Nov 6, 2013, at 6:09 AM, Jan Beulich <JBeulich@xxxxxxxx>

>>>> On 05.11.13 at 22:36, <Jeff_Zimmerman@xxxxxxxxxx> wrote:
>> Attaching the xen binary and symbols file.
>> Hopefully they will come through.
> Please give the attached patch a try - afaict it should eliminate
> the host crash, but I'm pretty certain you'll then see the guest
> misbehave. Depending on what other load you place on the
> system as a whole, you're either overloading it (i.e. we're
> running out of mapping space in the hypervisor) or there's a
> mapping leak that - so far at least - I can't spot.
> In any event I'd suggest you try running a debug build of the
> hypervisor, so that eventual problems can be spotted earlier.
> Jan
> <nVMX-map-errors.patch>

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