Re: [Xen-users] Enable Shadow Page Table

[George Dunlap <george.dunlap@xxxxxxxxxx>]

On Thu, Jul 21, 2016 at 8:14 PM, Alina Nicolae
<alinanicolae992@xxxxxxxxx> wrote:
> Hello,
>
> I have been trying to enable the SPT (Shadow Page Table) features and
> checked if they were enabled using the xenperf command.
> I added this command sed -i '$ a shadow-paging=y' .config to the .config
> file before recompiling xen, but the results of xenperf are the same (0 on
> all the fields related to shadow page table), which means the SPT features
> are still not enabled.
>
> I wonder if you could give me a solution to this problem.

I googled "xen shadow paging", which came up with our perfomance
tuning guide[1].  If you search for "shadow" in that document you'll
find the switch to disable HAP (and thus enable shadow) for HVM
guests.

If that's not what you want you need to be more specific.

 -George

[1] http://wiki.xen.org/wiki/Tuning_Xen_for_Performance

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