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    SubjectRe: [PATCH RESEND] mm: don't zero ballooned pages
    > Maybe it is my absolute lack of familiarity with what the host actually
    > does with balloon pages but I fail to see why the above matters at all.
    > ksm will not try to merge sub page units (4k for hugetlb or a large base
    > page). And if you need to hide the guest contents then the host can
    > clear the respective subpage just fine. So could you be more explicit
    > why MADV_DONTNEED matters at all? Also does any host actually share sub
    > pages between different guests? This sounds like a bad idea to me in
    > general.

    Okay, I think I got the issue wrong. I thought that the original patch
    tried to also fix a corner case where the guest would assume that it
    would get supplied zero pages afterwards. Please ignore the noise. :)




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