On 11/08/2016 05:01 AM, Naoya Horiguchi wrote: > TTU_MIGRATION is used to convert pte into migration entry until thp split > completes. This behavior conflicts with thp migration added later patches,
Hmm, could you please explain why it conflicts with the PMD based migration without split ? Why TTU_MIGRATION cannot be used to freeze/hold on the PMD while it's being migrated ?

