On 09/02/2015 15:37, Chris J Arges wrote:
> > Why do you need that?  If you are disabling something if you are on a
> > virtualized platform, then that is most of the time (and I am not saying
> > always only because of things like microcode.service) wrong.
> 
> A use-case is disabling KSM if running inside an L1 guest.

But even that might not make sense if KSM is disable in L0, I think.

BTW, I think Fedora has disabled KSM by default.

Paolo

> This would be
> changed to ensure better defaults rather than work around issues. The
> qemu-kvm packaging in Ubuntu enables KSM by default if you install the
> package. If we are attempting to do things like nested guests, then it
> may make sense to disable KSM when installing qemu-kvm in the L1 guest.
> Another solution to this issue is to not enable KSM in the package and
> let the user configure this when necessary.
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