Re: [PATCH 09/10] memory-hotplug: enable memory hotplug to handlehugepage

[Michal Hocko]

On Wed 27-03-13 17:29:19, Naoya Horiguchi wrote:
> On Wed, Mar 27, 2013 at 03:19:21PM +0100, Michal Hocko wrote:
[...]
> > If we made sure that all page on the hugepage_freelists have reference
> > 0 (which is now not the case and it is yet another source of confusion)
> > then the whole loop could be replaced by page_count check.
> 
> I think that free hugepages have refcount 0,

You are right. For some reason I totally missed that we drop
the reference from page allocator (put_page_testzero in
gather_surplus_pages).

Sorry about the stupit question.
-- 
Michal Hocko
SUSE Labs
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