Re: [Xen-devel] Xen 4.0 crashes with pvops kernel

[Jeremy Fitzhardinge <jeremy@xxxxxxxx>]

On 06/24/2010 12:30 PM, Jan Beulich wrote:
>> If the pte has _PAGE_IO set (which all ioremap ptes should), then it
>> will call xen_set_iomap_pte. This can't fail (not return code), so if
>>     
> Ah, right, I apparently looked at the upstream (i.e. DomU-only)
> implementation rather than your tree.
>   

Yes, that has no way to ioremap real hardware.

>> the hypercall fails then it will leave it unmapped.  It should at least
>> print a warn-on in that case.
>>     
> Yes, that's the minimal requirement I would say.
>   

Currently its implemented as a batched multicall, so the site itself
can't check to see if the hypercall worked.  I should check that it can
actually be called in a batched context.

    J

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