On Tue 08-11-16 08:31:51, Naoya Horiguchi wrote:

This patch makes it possible to support thp migration gradually. If you fail
to allocate a destination page as a thp, you just split the source thp as we
do now, and then enter the normal page migration. If you succeed to allocate
destination thp, you enter thp migration. Subsequent patches actually enable
thp migration for each caller of page migration by allowing its get_new_page()
callback to allocate thps.

Does this need to be in a separate patch? Wouldn't it make more sense to
have the full THP migration code in a single one?
-- 
Michal Hocko
SUSE Labs

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