Re: Populating multiple ptes at fault time

[Avi Kivity]

Jeremy Fitzhardinge wrote:
> Minor faults are easier; if the page already exists in memory, we should
> just create mappings to it.  If neighbouring pages are also already
> present, then we can can cheaply create mappings for them too.
>
>   

One problem is the accessed bit.  If it's unset, the shadow code cannot 
make the pte present (since it has to trap in order to set the accessed 
bit); if it's set, we're lying to the vm.

This doesn't affect Xen, only kvm.

--
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.

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