On Tue, 12 Sep 2017 22:43:06 +0200 Alexandru Moise 
<00moses.alexande...@gmail.com> wrote:

> This fixes a bug in madvise() where if you'd try to soft offline a
> hugepage via madvise(), while walking the address range you'd end up,
> using the wrong page offset due to attempting to get the compound
> order of a former but presently not compound page, due to dissolving
> the huge page (since c3114a8).

What are the user visible effects of the bug?  The wrong page is
offlined?  No offlining occurs?  

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