Re: [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. :)

-- 

Thanks,

David